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  • Articles  (21,314)
  • 1990-1994  (21,314)
  • 1993  (21,314)
  • Computer Science  (11,057)
  • Geography  (7,855)
  • Technology  (2,671)
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  • 1990-1994  (21,314)
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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: Policies to counter the growing discrepancy between economic opportunities in rural and urban areas have focused predominantly on expanding manufacturing in rural areas. Fundamental to the design of these strategies are the relative costs of production and productivity of manufacturing in rural compared to urban areas. This study develops information that can be used to assess the productivity of manufacturing in rural and urban areas. Production functions are estimated for the meat-products and household-furniture industries to investigate selected aspects of location and productivity. The results show that the effect of location on productivity varies with industry, size, and the timing of entry. Although the analysis is specific to two industries, it suggests that development policies targeting manufacturing can be more effective if they focus on industries and plants with characteristics that predispose them to the locations they support.
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: . It is increasingly recognized that the assumption that the supply of tradable output is perfectly elastic, which underlies many regional economic models (esp. economic base models), does not hold in many developing countries. When the supply of tradable output (primarily agricultural products) and, in many cases, non-tradable output is inelastic, the resulting income multipliers will be substantially reduced. Recent calls for the promotion of market towns and smaller urban centers have not fully considered the impact of supply in elasticities on the capacity of such measures to stimulate broad-based development. This study uses data collected from firms in several market-town systems in Niger to examine the probable consequences. The paper argues that such policies are unlikely to be effective in countries like Niger where the vulnerability of the rural economy has severely limited the elasticity of the supply response, especially for agriculture and nonfarm production by small-scale producers.
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: Abstract: Although they are required to make very large investments, port authorities are discovering that they have less and less control over their destinies. The major decisions affecting port traffic are made by shipping lines whose activities are global in scale. This paper examines the plight of public monopoly ports in a highly competitive environment. Several policy options are discussed.
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: Qualitative and quantitative procedures have been used to aggregate communities and counties for regional economic analysis. However, Once aggregated, communities and counties are perceived as homogeneous entities; this often belies the diversity that may exist. In order to capture the non-uniqueness of counties, fuzzy-set clustering procedures were employed to derive a typology of Nevada counties. Fuzzy-set clustering procedures employing fuzzy-set membership values and possibility theory derive county membership values associated for specific county clusters. Information from fuzzy partitions yields a means for posterior evaluation of county clusters which is independent of the algorithm producing them. From county membership values calculated from results of the fuzzy-set clustering analysis for Nevada, specific economic development programs for aggregate and individual counties are derived.
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: The focus of this study is the examination of the interstate differences in per capita state and local revenues. On one side free competition among states is supposed to keep the interstate differences in per capita state and local revenues at a minimum level. On the other side, the interstate differences in variables like income and taste of consumers, natural conditions (like climate), state's size (scale effect), and others may explain the existing interstate differences in per capita state and local revenues. The empirical results indicate that we successfully explained over 90 percent of the variance in per capita state and local revenues. Additional empirical results reveal that the federal government distributes money among states in a discriminate fashion based on region and size.
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: Book review in this Article:A History of Housing in New York City: Dwelling Type and Social Change in the American Metropolis. By Richard Plunz.Long-Wave Rhythms in Economic Development and Political Behavior. By Brian J.L. Berry.Debt Cycles in the World Economy: Foreign Loans, Financial Crises, and Debt Settlements, 1820-1990, By Christian Suter.Negotiating Debt: The IMF Lending Process. By Kendall W. Stiles.Overexposed: U.S. Banks Confront The Third World Debt Crisis. By Raul L. Madrid.Lessons of Economic Stabilization and its Aftermath. By Michael Bruno, Stanley Fischer, Elhanan Helpman, and Nissan Liviatan, with Leora (Rubin) Meridor (editors).New Horizons? Third World Mustrialization in an International Framework. By Robert N. Gwynne.Venture Capital: International Comparisons. By Milford B. Green, editor.A Complicated War: The Harrowing of Mozambique. By William Finnegan.
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  • 7
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    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: Schumpeterian perspectives on industrial change suggest a relationship between new firms and the regionally specific technological bases for innovation. However, the links between such firms and the knowledge bases for innovation are more implicit than explicit. The innovation process in new firms reflects both the capabilities found within the firm as well as information sourcing from without.This paper seeks to articulate the nature of change in relationships between firms in science-based industries and the technological infrastructure accessed to support innovation, as such industries mature out of the birth phase. Innovation is treated as decision making, identifying the firm as innovator and agent of change.Survey research suggests that a shift in the sourcing of information, and an associated shift in the character of information accessed, occurred with maturation in the study industry, comprised of biotechnology firms in the U.S. “Early” and “later” forming firms show somewhat different technology sourcing patterns. Interviews were conducted to help interpret these findings. Implications for industry development are suggested.
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  • 8
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    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: . A recent article in this journal concluded that West Virginia's low labor force participation rates cannot be attributed to economic, demographic, or institutional factors and that they probably result from an Appalachian culture which has a strong preference for non-market activities. This article reviews the diverse social science literature on determinants of labor force participation and then takes a closer look at Appalachian participation. It presents and uses a more comprehensive model, focuses on the county level instead of the state, and examines variations within Appalachia and over time. The main findings are that the Appalachian labor force gap is either nonexistent or very small and that there is no statistical evidence of a unique or pervasive Appalachian cultural effect. Appalachian labor force behavior appears to be quite average given the conditions faced by Appalachians.
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  • 9
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    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: Book reviewed in this article:Book Review Essay Deindustrialization and Regional Economic Transformation: The Experience of the United States. Edited by Lloyd Rodwin and Hidehiko Sazanami.Industrial Change and Regional Economic Transformation: The Experience of Western Europe. Edited by Lloyd Rodwin and Hidehiko Sazanami.The Bias Against Agriculture: Trade and Macroeconomic Policies in Developing Countries. Edited by Romeo M. Bautista and Alberto Valdes.Central and East European Economies in Transition: The International Dimension. By Andras Koves.Where North Meets South: Cities, Space, and Politics on the u.s.- Mexico Border. By Lawrence A. Herzog.Migration, Population Structure, and Redistribution Policies. Edited by Calvin GoldscheiderMigration and Residential Mobility By Martin Cadwallader.State Government and Economic Performance. By Paul Brace.Hollow Promises: Rhetoric and Reality in the Inner City. Edited by Michael Keith and Alisdair Rogers.Wildlife Management and Subsistence Hunting in Alaska. By Henry P, Huntington.Spreadsheet Models for Urban and Regional Analysis. Edited by Richard E. Klosterman, Richard K. Brail and Earl G. Bossard.
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: In recent years, many states have raised the amount of resources they devote to economic development programs, particularly those providing direct monetary assistance to firms. However, scholarly attention to this topic has not kept pace and, as a result, relatively little is known about such policies' effectiveness. This paper examines the effectiveness of monetary incentives using Ohio's experience with such programs in the 1980s. Empirical results show that incentives are significantly related to employment and income growth at the county level. Grants are found to be more effective than loans, and capital subsidies to businesses more effective than either labor subsidies to businesses or capital subsidies to communities. Finally, resources given to creating jobs are more effective than resources for retaining or training existing workers.
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  • 11
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    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: This paper examines the sources of regional convergence in per capita incomes over the last four decades. Growth in per capita income is decomposed into two major components: (1) growth in employment rates and (2) growth in wage rates per worker. Using annual data from the Bureau of Economic Analysis and the Bureau of Labor Statistics, the paper finds that the observed convergence in per capita incomes of sates was largely due to convergence in employment rates; wage rates either did not converge or did so weakly. Employing an instrumental variables technique, the paper finds that rapid growth in the work force with relatively low levels of human capital in initially poor states was a depressing influence on wage rate growth in these states, and was a major reason for the relatively slow convergence in per capita incomes.
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  • 12
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    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: This paper examines a variety of quasi-governmental organizations, mandatory homeowners' associations, special service districts, and transportation management associations, recently established in the urban region. Using the Washington, DC metropolitan area as a case study, this paper explores reasons for their development and implications of them for urban governance. It is argued that these organizations marry the concepts of public special districts and public-private partnerships in a process of private government formation. Private governments, it is suggested, are not wholly a private response to the shedding of services by the public sector, the dominant notion of privatization and local state restructuring, but the result of demands emerging in the private sector stimulated by social and spatial change. This signals the need to add to the concept of public-driven privatization the process of private initiated change where the resulting goods and services are more fully shaped by the needs of private interests. The evidence suggests these institutions do not represent a scaling back of the local state as privatization implies, but an extension of state structures in a fundamentally new direction, an extension which could be labeled the parallel state.
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  • 13
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    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: This paper investigates the migration patterns of occupational groups. The results confirm previous analyses of the differences in movement behavior between occupations but, in addition, show that this variation is a function of the industrial sector of employment. The chief aim of the paper, however, is to uncover the geography of labor flows for different occupational groups using a principal components analysis of interstate flow matrices. The resulting migration regions are homogeneous with respect to the movement behavior of particular classes or labor in each state. Results indicate that migration regions vary by occupation and industry and we argue that these differences reflect job information flows and regional employment structure for various classes of labor. The concluding remarks offer a number of additional avenues for research on occupational migration, and regions in general.
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  • 14
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    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: The fertility downturn in the U.S. since the baby boom has been accompanied by a growing divergence in regional fertility rates. This paper examines the spatial implications of recent fertility trends. Two interrelated questions are posed. First, how and why have the time trends in fertility varied spatially? Second, how have the regional patterns of fertility changed over time? These questions are investigated using a continuous spatio-temporal model of U.S. fertility built using the Dual Expansion Method. Results indicate that the pace of fertility decline has been the most rapid in the Northeast and the slowest in the West. Further, the traditional North-South distinctions in fertility rates are being replaced by East-West patterns. These changes tentatively suggest that regional ethnic composition is becoming an increasingly important factor in accounting for the spatial variation of U.S. fertility.
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  • 15
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    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: John Turner's benchmark model of the Latin American city depicts relationships between urban growth and the intra-urban mobility, shelter, economic status and location of its low-income migrants. This conceptual model, described below, requires additional empirical assessment, quantitative specification, and updating to encompass the deep regional recession since 1980. Evidence from a survey of low-income migrants in Quito in 1989 supports portions of the model. However, Quito does not support the model's other predictions about the geography of shanties, houses, and migrants based on length of residence and employment patterns. The poor scramble for work and shelter wherever they may be found. Quito's enforcement of policies against land invasions confines a relatively large portion of the poor to rented rooms. We conclude that the model underconceptualizes and overstates relationships between a Latin American city's phase of urbanization and the length of residence, location, shelter, and work of its low-income migrants. Rather than abandoning the model, however, we recommend that research use it as a point of departure for investigating the additional contributions of local development and policy.
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  • 16
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    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: Innovation, use of high technology, and flexibility of response to customer needs are studied in two surveys of small manufacturing firms in New York and Pennsylvania. They are shown in both surveys to be separate and unrelated concepts. None of five industry-level classifications of high-technology firms, using SIC codes predict these concepts on a firm level. Only innovation is related to a sophisticated firm marketing program. and to export from the state.
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  • 17
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    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
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  • 18
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    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: This paper discusses recent shifts in the overseas investment strategies of Japan's major multinational manufacturing companies (MNCs). Based on a survey of twenty corporations it is postulated that the move towards the globalization of these companies has taken place in three distinct but overlapping phases: (1) a linear link-up to Japan, (2) a transition stage, based upon international specialization and‘mesh’strategies, and (3) a tetra-polar strategic division of the world. The paper commences with a discussion of recent trends in MNC behavior, and then shows how overseas corporate organization has changed in the Japanese firms surveyed, especially after 1985. The implications of these changes among the major global regions is examined. The paper concludes with an assessment of whether the strategies of Japanese MNCs have converged with those. of United States or European MNCs, and to what degree they have retained their own distinctive attributes.
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  • 19
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    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: This paper develops a conceptual model of the process of community change in response to elderly immigration. Analysis of intra-regional variation in elderly migration patterns in Appalachia, and synthesis of an emergent literature on the benefits and costs of attracting elderly migrants, serve as a backdrop for case studies, based on field observations and interviews, of three contrasting Appalachian communities at different stages of development as retirement destinations. The analyses suggest a temporal model of community development involving overlapping phases of emergence, recognition, restructuring, saturation, and the development of new concerns, as the process of demographic change evolves and its economic, environmental, infrastructural, social, and political correlates become manifest. It is concluded that communities considering attraction of elderly migrants as a development option should carefully consider both the diverse characteristics and needs of potential migrants and the long-term implications and desirability of the community transformation that results from adopting such a strategy.
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  • 20
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    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: This paper provides a profile of regional income inequality using a distributional criterion whereby a state's share of total income equals its share of total population. The results for 1929 to 1990 show that inequality persisted among regions with a substantial declining trend up to 1979 and a slight rise thereafter. On the other hand, equality among states within their regions is found to have been the condition since 1929.
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  • 21
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    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: The Free Trade Agreement (FTA) implemented beginning in 1989 by the United States aid Canada will have significant impacts on bilateral trading patterns. In addition to its long-term, investment-related repercussions, the FTA will affect the volume, commodity composition, and spatial distribution of trade and, consequently, the transportation services required to move commodities between the two nations. This paper examines the changing spatial structure of U.S.-Canadian trade under the FTA. It employs commodity-specific analyses of tariffs and non-tariff barriers, as well as price and income elasticities of demand, to estimate sectoral and special changes among U.S. states in total, land, water, and airborne commodity flows since 1988 attributable to the FTA. The analysis details the assumptions and methodology used, elaborates upon the likely consequences for me nation's ten largest customs districts, particularly New York, and concludes with some comments on other forces that may alter the expected results.
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  • 22
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    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: Book reviewed in this article:Saving The Planet: How To Shape An Environmentally Sustainable Global Economy. Lester R. Brown, Christopher Flavin and Sandra Postel.International Trade And Global Development: Essays In Honour Of Jagdish Bhagwati. Edited by Ad Koekkoek and L.B.M Mennes.The State Offshore: Petroleum, Politics And State Intervention On The British And Norwegian Continental Shelves. Brent F. Nelson.The Promised Land: The Great Black Migration And how IT Changed America. Nicholas Lemann.The Burden Of Dependency: Colonial Themes in Southern Economic Thought. Joseph J. Persky.Credrr Where It's Due: Development Banking for Communities. Julie Ann Parzen and Michael Hall Kieschnick.Challenging Uneven Development: An Urban Agenda For The 1990s. Edited by Philip W. Nyden and Wim Wiewel.Sources Of Metropolean Growth. Edited by Edwin S. Mills and John F. McDonaldSoft Coal, Hard Choices: The Economic Welfare Of Bituminous Coal Miners, 1890–1930. Price V. Fishback.South Africa's Labor Empire: A History Of Black Migrancy To The Gold Mines. Jonathon Crush, Alan Jeeves, and David Yudelman.Politics Or Markets? Essays On Haitian Underdevelopment. Mats Lundahl.The Illusion Of Choice: How The Market Economy Shapes Our Destiny. Andrew Bard Schmookler.Wilderness Areas, Regional Planning, and the Quality of Life
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  • 23
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    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: Analysts faced with the challenge of constructing a regional input-output table from partial or nonsurvey-based data typically adapt a national input-output table to reflect the regional economic structure. Detailed benchmark input-output tables with more than 500 industry sectors are compiled for years at five-year intervals, but are many years out of date by the time they are released. Annual updates are compiled for intervening years, but detail only 85 industry sectors. Analysts therefore must choose between the currency of the data and its detail in the national table that serves as the reference. This paper presents a table disaggregation and adjustment (TDA) method for combining the information from the detailed benchmark tables with the more current but aggregated data. Empirical tests demonstrate that the TDA method generates base data that analytically outperform the aggregated annual update data.
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  • 24
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    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
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  • 25
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    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: This research examines key components of the broad national debate over the decline of the middle economic class of the United States at the regional level. Full-time and part-time workers’distributions of earnings among the low-, middle- and upper-earner groups are examined for the four major Census regions from 1967 to 1987. The premise is that the postwar boom era was a period in which the earnings of one full-time worker could purchase a middle standard of living (using home ownership as a proxy) for a household. Thus, change in the purchasing power of full-time earnings for home ownership is tracked between 1967 and 1987 at the regional level. In addition, regional changes in levels of fringe-benefit recipiency are examined.Full-time workers have seen a dramatic upwards shift in their earnings disiributions in all regions, accompanied by substantial erosion in their purchasing power. Earnings distributions across regions have converged, but the costs of home ownership have diverged. As a result, certain regions offer locational advantages for consuming the middle standard of living. Arising from these findings, this paper concludes with a set of questions for policymakers.
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    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: Book Reviews in This Article:THE DIVERSITY OF LIFE By Edward O. Wilson.THE CAR AND THE CITY: THE AUTOMOBILE, THE BUILT ENVIRONMENT AND DAILY LIFE. By Martin Wachs and Margaret Crawford, editors.WHO'S BASHING WHOM? TRADE CONFLICTS IN HIGH-TECHNOLOGY INDUSTRIES By Laura D'Andrea Tyson.THE PENTAGON AND THE CITIES. By Andrew Kirby, ed.DEFENSE, WELFARE AND GROWTH: PERSPECTIVES AND EVIDENCE. By Steve Chan and Alex Mintz.SACRED COWS AND HOT POTATOES: AGRARIAN MYTHS IN AGRICULTURAL POLICY. By William P. Browne, Jerry R. Skees, Louis E. Swanson, Paul B. Thompson, and Laurian J. Unnevehr.RURAL POLICIES FOR THE 1990S. Edited by Cornelia B. Flora and James A.ELECTRONIC BYWAYS: STATE POLICES FOR RURAL DEVELOPMENT THROUGH TELECOMMUNICATIONS. By Edwin B. Parker and Heather E. Hudson with Don A. Dillman, Sharon Strover, and Frederick Williams.
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  • 27
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    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: Five versions of a regional economic forecasting and simulation model are implemented to evaluate the forecasting accuracy and significance for impact analysis of alternative regional labor market closures. The five versions correspond to the following specifications: downward-sloped labor demand and upward-sloped labor supply, vertical labor demand and upward-sloped labor supply, an input-output version, and two general equilibrium configurations of labor demand and supply. It is found that the estimated impacts of an exogenous employment stimulus differ greatly across the model versions. Also, post-sample forecasts for 1981-1988 are run for the fifty states plus Washington D.C. with each model version to test their relative forecast accuracy. The forecast comparison shows that the general equilibrium version that specifies inelastic supply is inferior to the other versions for short-term forecasts of wage rates and long-term employment forecasts. For both short- and long-run population forecasts, the versions with completely immobile labor are more accurate than those with completely mobile labor. However, versions that specify an upward-sloped labor supply (partial labor supply adjustment) are the most accurate.
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  • 28
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    Growth and change 24 (1993), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: The peace dividend typically is conceptualized as the transfer of dollars from defense to domestic, social needs. This Perspective redefines the peace dividend in terms of the conversion of talent, expertise, and technologies from the production of weaponry to commercial products and processes, which will have positive effects overall on the American economy. The dynamic of this conversion is specified in terms of corporate reorganization among American military industrial firms (MIFs) in existing and strategic industries such as electronics, as well as new growth sectors such as environmentally conscious industries.
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  • 29
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    Journal of regional science 33 (1993), S. 0 
    ISSN: 1467-9787
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: . Considerable effort has been devoted within the recent literature to the valuation of urban amenities and disamenities, as well as to econometric procedures required for the estimation of their implicit market “prices.” This study questions the equilibrium conditions invoked within this literature to derive estimates of marginal willingness to pay, conditions premised upon “perfect” labor mobility among cities. It is shown that such assumptions need not be invoked if one considers the amenity price-mobility relationship directly. This is accomplished by appending a binary migration model to a first-stage wage equation, a procrdure that provides estimates of willingness to pay that can diverge from market-determined implicit prices. Comparison of such values yields important information on the adequacy of market compensation for disamenities (amenities) throughout metropolitan areas.
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    Journal of regional science 33 (1993), S. 0 
    ISSN: 1467-9787
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    Topics: Geography , Economics
    Notes: Book Reviewed in this article:The Economics of Oligopolistic Competition: Price and Nonprice Rivalry, Collected Papers of Robert E. Kuenne, by Robert E. Kuenne.Urban Transportation Economics, by Kenneth A. Small.Infrastructure and the Space-Economy: Essays in Honor of Rolf Funck, edited by Karin Peschel.Spatial Statistics: Past, Present, and Future, edited by Daniel A. Griffith.Wage Flexibility and Unemployment Dynamics in Regional Labor Markets, by Thomas Hyclak and Geraint Johnes. Review by Lori G. KletzerPut Up or Give Way: States, Economic Competitiveness, and Poverty, by John Sidor.The Production of Space, by Henri Lefebvre.River Towns in the Great West: The Structure of Provincial Urbanization in the American Midwest, 182CL1870, by Timothy R. Mahoney.China's Coastal Cities: Catalysts for Modernization, edited by Yue-manYeung andXu-wei Hu.Technology and Economic Development: The Dynamics of Local, Regional, and National Change, by Edward J. Malecki.The Rise of the Gunbelt: The Military Remapping of Industrial America, by Ann Markusen, Peter Hall, Scott Campbell, and Sabina
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    Singapore journal of tropical geography 13 (1993), S. 0 
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    Expert systems 10 (1993), S. 0 
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    Topics: Computer Science
    Notes: Abstract: Cooperating experts approach attempts to integrate and coordinate the activities of multiple specialised problem solvers that come together to solve complex tasks such as design, medical diagnosis, business management and so on. Due to the different goals, knowledge and viewpoints of agents, conflicts may arise at any phase of the problem-solving process. Managing diverse expertise requires well-organised models of conflict resolution. In this paper, a model for cooperating experts is described which openly supports multi-agent conflict detection and resolution. The model is based on the idea that each agent has its own conflict knowledge which is separated from its domain level knowledge, and each agent has its own conflict resolution knowledge which is not accessible and known by others. Furthermore, there are no globally known conflict resolution strategies. Each agent involved in a conflict chooses a resolution scheme according to its self interest. The model is described by using an example in the domain of office design and it is compared with other systems.
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    Notes: Abstract: Maintainability problems associated with traditional software systems are exacerbated in rule-based systems. The very nature of that approach — separation of control knowledge and data-driven execution — hampers maintenance. While there are widely accepted techniques for maintaining conventional software, the same is not true for rule-based systems. In most situations, both a knowledge engineer and a domain expert are necessary to update the rules of a rule-based system. This paper presents, first, an overview of the software engineering techniques and object-oriented methods used in maintaining rule-based systems. It then discusses alternate paradigms for expert system development. The benefits of using case-based reasoning (from the maintenance point of view) are illustrated through the implementation of a case-based scheduler. The main value of the scheduler is that its knowledge base can be modified by the expert without the assistance of a knowledge engineer. Since changes in application requirements can be given directly to the system by the expert, the effort of maintaining the knowledge base is greatly reduced.
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    Notes: Abstract: The LFA algorithm is a linear forward-chaining algorithm for AI production systems. It finds all the possible solutions for each given problem in a time proportional to the number of rules in a knowledge base, after all the possible evidence about the problem has been given. This paper presents the algorithm in detail. Another new technique, the‘rule schema + rule body’representation, which is coupled with the chaining algorithm to support high efficiency of production system interpreters, is also described here.
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    Notes: Abstract: We describe a one-class classification approach to an automatic target detection problem, which involves distinguishing targets from clutter in diverse environments. We use only target statistics to construct the classifier. The classifier combines conventional and neural network methods. The classifier is a Parzen estimator, which requires storage and recall of all training points. To reduce the size of the training set, we apply two neural network learning algorithms: (1) we use a backpropagation network to approximate the Parzen estimator; (2) we apply the infomax learning principle to compress the size of the training set before constructing the Parzen estimator. We find that the results obtained with the infomax scheme approach those obtained with Parzen alone and are better than those obtained with backpropagation.
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    Notes: Virtual Reality: Applications and Explorations Alan Wexelblat (Ed.)
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    Expert systems 10 (1993), S. 0 
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    Notes: Abstract: IEADVISE is an undergraduate course-advising expert system developed and used by the Department of Industrial Engineering at the University of Missouri-Columbia, USA. The motivation for this development was the need for an online system that would make undergraduate course-advising accessible at all times to the Industrial Engineering students. Expert System Environment (ESE), an expert system shell on the IBM mainframe, was chosen as the development tool. This paper describes the knowledge base, the expert system and its operation, and the verification and validation procedures. Results of the verification and validation performed to ensure accuracy and reliability will be discussed.
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    Expert systems 10 (1993), S. 0 
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    Notes: Abstract: Although MIS professionals had predicted that expert systems would improve productivity enormously, and a number of expert system application success stories have been reported, the expert system revolution has not yet happened. Moreover, there have been many cases, less well publicised, where expert systems have failed. Most problems concerning expert systems failure stem from non-technical issues such as cognitive and psychological problems, rather than such purely technical issues as an inference engine and an expert system shell. Here, the major reasons for expert systems failure and the need to consider human factors are discussed. We then propose human factor principles that can help designers handle most of these non-technical problems and many technical ones elegantly, improving the performance and acceptance of expert systems. Finally, some human factor guidelines for expert systems are presented so that these considerations may be incorporated into expert systems development in a clear and comprehensible manner.
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    Notes: Abstract: This paper describes a system of shallow and deep knowledge acquisition and representation for diagnostic expert systems. The acquisition system is integrated into a diagnostic expert system shell. Shallow knowledge is represented in a failure model as a set of cause-effect relations among the possible faults, while deep knowledge is represented in three deep models: a functional, a deep causal and a taxonomic model. The acquisition and the representation of all the models are fully integrated. The deep knowledge is used by the final expert system in order to provide the user with deep explanations of the cause-effect relations of the failure model.
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    Notes: Abstract: An important problem in financial investment is the classification of bonds based on the likelihood that the issuing company may default on the promised payments. Much effort has been invested into simulating the bond rating process using statistical tools. A weakness of these tools is the requirement of statistical assumptions which may not be appropriate for the bond rating problem. In this paper we present results of a study comparing an artificial neural network system, a rule-based expert system and statistical techniques applied to the bond rating problem. The bond rating process is simulated by using published financial data.
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    Notes: Abstract: This paper describes how statistical techniques and rule induction have been combined to form a data exploration toolkit. The ways in which such an approach alleviates the problems associated with other techniques for data exploration are discussed. Finally, we present some case studies carried out with the toolkit.
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    Notes: Understanding Neural Networks: A Primer (2nd Ed.) Claude Cruz
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    Notes: Abstract: This paper describes a project undertaken in the Department of Information and Library Studies at Loughborough University to develop a prototype expert system to assist with the selection of online business databases for British company information. The project was funded by the British Library Research and Development Department for 21 months, commencing July 1990. Specific phases of the project comprised a literature survey, knowledge acquisition involving experts in online searching, the design and development of a system called CIDA (Company Information Database Adviser) which was some 4Mb in size, and a user evaluation of this prototype. The study demonstrated that expertise in business database selection can successfully be distilled into a number of rules which can be applied by an expert system.
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    Notes: Abstract: Expert systems are useful tools for the efficient application of image processing software packages. This paper describes an image processing expert system based on the SPIDER package (Tamura et al. 1983). The system supports inexperienced users who wish to solve image processing problems by means of SPIDER subroutines. We give a detailed description of the concepts underlying the construction of the system and present the main components of the knowledge base. The modular structure of the knowledge base can be considered as a generalised approach to software configuration expert systems which can easily be adapted to other image processing software packages and other problem domains.
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    Notes: Abstract: The vitality of effective methods and processes for developing knowledge-based systems (KBS) is examined. The paper discusses what should be expected from a methodology. Have their advocates been getting it all wrong all the way? That is certainly a suggested view put forward. The criticism includes an articulation of the major schools of thought in developing KBS; their implicit assumptions and philosophies, especially the prototyping options, are presented in the light of this paper. After the criticism, the philosophical basis of a new comprehensive KBS development methodology is presented. This breeds the line model of development, which in turn creates what is suspected to be an essential concept of thought in the developer's mind.
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    Notes: Abstract: Expert system researchers have paid little attention to studying empirically the psychological validity of alternative methods for combining certainty factors. These combining methods, called certainty factor algebras (CFAs), have been organized into a classification framework and a normative mapping has been prescribed to indicate which operators (e.g. AND, OR, +, −, 〉) should be mapped into each CFA category. However, with the exception of one study concerned solely with the AND operator, there has been no empirical base for assessing the representativeness of the normative mappings. We report on the results of an experiment that compares certainty-combining behaviors versus diverse CFA results for logical, arithmetic and relational operators. This includes a consideration of certainty magnitude and operand magnitude effects. The result is a significant improvement in our understanding of the psychological validity of certainty factor algebras. Such an understanding is important both to knowledge engineers and to the creators of expert system development tools.
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    Notes: Book reviewed in this article:Advanced Information Systems for Lawyers, V. Mital and L. Johnson
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    Notes: Abstract: Function points have become an accepted measure of software size and are becoming an industry standard. However, the application of function point analysis is fairly complex and requires experience and a good understanding to apply it in a consistent manner. This paper describes the development of a knowledge-based, object-oriented system to assist an analyst in performing function point analysis. The objective of the function point analysis (FPA) tool is to allow an analyst to estimate system size in function points without having extensive training or experience using the function point method. The FPA tool uses information available in a functional specification that is a product of the requirements analysis phase of the software development life cycle. An object-oriented model was used to represent the functional requirements of a software system.
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    Notes: Abstract: This paper presents an expert system shell whose inference mechanism uses backward chaining. In particular the modules devoted to constructing and consulting the knowledge base are illustrated. The programming environment is based on the Arity-Prolog language, a popular Prolog dialect running on IBM PCs and compatibles.
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    Notes: Abstract: The SKADE system models expertise in corporate settlement decisions using the blackboard approach. The full model has four knowledge sources: General Counsel, Attorney, Manager and Insurance Adjuster. The combined expertise from each of these is required to make the settlement decision. A control component in the model coordinates the activities of the various knowledge sources. Based on the latest data entries on the blackboard, the control selects and executes the next knowledge source. The blackboard model reproduces the experts' opportunistic reasoning processes by the interaction between the various knowledge sources. The results of analyses of a hypothetical case through a series of experiments with the SKADE system indicate that the blackboard is an appropriate model for development of multiple cooperative expert systems in the settlement decision domain. Compared to straight rule-based models, this blackboard provides more efficient problem solving. The initial success with the blackboard model suggests that further work needs to be done to see whether more complex models can be built to incorporate a broader range of determinants of settlement decisions.
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    Polar research 12 (1993), S. 0 
    ISSN: 1751-8369
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    Topics: Geography , Geosciences
    Notes: A total of 26 polar bears have been killed in Svalbard since January 1987. Fifteen of these cases were self defense, four precautionary measures, six acts of mercy and one unknown. Twelve of the 15 self defense cases occurred in the wilderness; none occurred in populated areas. Most self defence cases involved nonresidents of Svalbard and hence people not familiar with polar bear behaviour and encounters.
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    Notes: The polythcrmal valley glacier Erikbreen (79°40′N 12°30′E), northern Spitsbergen, was investigated in 1970 and 1990 using digital photogrammetry and digital elevation model (DEM) techniques. The bottom topography was derived from radio-echo soundings. Based on the DEM, mass balance and changes of surface slope, crevasse and flow pattern were evaluated, and internal ice deformation velocities were calculated. Calculations of the total mass balance show that Erikbreen has not been in equilibrium for the last 20 years. The average surface lowering was 0.38 m/a and the volume had decreased by 5% to 6% from 1970 to 1990 or on the average by 3.5 × 10−1 water. The glacier surface subsided over the whole glacier area except in minor areas with northfacing slopes in the accumulation area. The surface slope and the crevasse pattern, however, did not change significantly during the 20-year-period, except in areas below 100 ma.s.l.
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    Notes: The oribatid mite Maudheimia wilsoni Dalenius was found to be numerous on the underside of stones at Jutulsessen (72°S, 3′E) in Dronning Maud Land, Antarctica. Daily temperature fluctuations of the microhabitat from as high as 19°C and to as low as – 17°C were observed during the austral summer. Optimal activity of the mites occurred at 10°C. Even in January the mean supercooling point of adult mites was as low as -30.8±4.7°C. Haemolymph osmolality ranged from 500 to 800mOsmol and thermal hystersis freezing points from −4.7 to −6.1°C. Adult mites had a mean water content of 43.6% and a water loss rate of 0.12 μgh−1 at 15°C and 10% relative humidity.
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    Notes: During the second half of August 1992 polar bears were observed feeding intensively in the little auk Alle alle colony on Rubini Rock, Hooker Island, Frans Josef Land. They dug out nests eating eggs, chicks and adult birds. Their activity results in both worsening the breeding conditions and decreasing the breeding success of the little auks. The polar bear has not earlier been known as a little auk predator.
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    Notes: The main purpose of this research was to measure the near surface ground temperatures and describe the main characteristics of the thermal regime of a sheltered arctic coastal cliff. Measurements were made near Ny-Alesund, western Spitsbergen, Svalbard (79°N, 12°E), in a transect across sediments on top of a coastal cliff, in a 8 m high coastal cliff and across the beach below the cliff. Temperatures were logged hourly from August 1987 to August 1988. A local snow cover of 1–4 m on the beach had a strong influence on surface heat exchange, and hence the dynamics of the ground thermal regime. Late winter temperatures in the cliff and backshore sediments were stable and ranged from -5°C to -9°C. At the first snow melt events in spring there was a large heat flux into the ground due to the release of latent heat from refreezing of meltwater. The interpretation of the temperature records leads to a discussion on some aspects of cryogenic weathering. The snow-melt period in spring and summer may be a period of rock fracturing, based on the model of segregation ice growth at subzero temperatures. Steep temperature gradients and available meltwater at the surface favor water migration in the heavily fractured dolomitic limestone even at the low hydraulic conductivities expected at below zero temperatures.
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    Notes: Glasgow's revival of the “imagery debate” in computational terms provides a renewed opportunity to review the role of logical reasoning in general problem solving. Of special interest is the long-standing distinction between analogical or depictive problem representations, and the more abstract linguistic forms typified by traditional formal logic syntax.In our brief statement, we recall that logical reasoning rests on semantics not syntax, and that the concepts of soundness, completeness, and consistency are manifest in both depictive and linguistic representations. We emerge with two conclusions: (1) enduring confusion regarding computational aspects of the “imagery debate” arise from long-standing confusion regarding key logical concepts, and related notions such as epistemological versus heuristic adequacy, logical versus probabilistic independence, and direct versus indirect representations; (2) the desire for depictive reasoning methods is ultimately motivated by human needs, not computational needs.
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    Notes: Whilst I agree largely with Janice Glasgow's position paper, there are a number of relevant subtle and important issues that she does not address, concerning the variety of forms and techniques of representation available to intelligent agents, and issues concerned with different levels of description of the same agent, where that agent includes different virtual machines at different levels of abstraction. I shall also suggest ways of improving on her array-based representation by using a general network representation, though I do not know whether efficient implementations are possible.
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