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  • Articles  (13)
  • E32  (9)
  • global optimization
  • Springer  (13)
  • American Chemical Society (ACS)
  • Cell Press
  • 2010-2014
  • 1995-1999  (13)
  • 1980-1984
  • 1999  (13)
  • Economics  (10)
  • Mathematics  (4)
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  • Articles  (13)
Publisher
  • Springer  (13)
  • American Chemical Society (ACS)
  • Cell Press
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  • 2010-2014
  • 1995-1999  (13)
  • 1980-1984
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Empirical economics 24 (1999), S. 173-180 
    ISSN: 1435-8921
    Keywords: Key words: Inequality ; consumption ; inflation ; unemployment ; JEL classifications: D31 ; D12 ; E32
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract. Using Consumer Expenditure Survey data, we obtain summary measures of the distributions of income and consumption for each quarter between 1980 and 1994. We find that the trends in the distribution of income and consumption and the response of these trends to changes in inflation and unemployment were similar during this period. We find that unemployment does not significantly affect the inequality measures and that inflation has a progressive effect, i.e., that a decrease in inflation is associated with an increase in inequality. Finally, we find that the relationship between inequality and macroeconomic variables during the 1990s may be similar to the relationship that existed prior to 1980.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Empirical economics 24 (1999), S. 373-388 
    ISSN: 1435-8921
    Keywords: Key words: Kalman filter ; NAIRU ; Okun's law ; Phillips curve ; potential output ; structural time-series models ; unobserved-components models ; JEL classification: C32 ; E32
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract. This paper proposes a new approach for estimating potential output and the NAIRU. The methodology models these key unobservable economic variables as latent stochastic trends within a trivariate system of observables comprising information on unemployment, GDP, and inflation. Identification is achieved through the use of a standard version of Okun's law and a Phillips curve. The performance of the procedure is investigated using Swedish quarterly data covering the time period 1970:1–1996:3.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Methodology and computing in applied probability 1 (1999), S. 127-190 
    ISSN: 1387-5841
    Keywords: combinatorial optimization ; global optimization ; importance sampling ; markov chain monte carlo ; simulated annealing ; simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We present a new and fast method, called the cross-entropy method, for finding the optimal solution of combinatorial and continuous nonconvex optimization problems with convex bounded domains. To find the optimal solution we solve a sequence of simple auxiliary smooth optimization problems based on Kullback-Leibler cross-entropy, importance sampling, Markov chain and Boltzmann distribution. We use importance sampling as an important ingredient for adaptive adjustment of the temperature in the Boltzmann distribution and use Kullback-Leibler cross-entropy to find the optimal solution. In fact, we use the mode of a unimodal importance sampling distribution, like the mode of beta distribution, as an estimate of the optimal solution for continuous optimization and Markov chains approach for combinatorial optimization. In the later case we show almost surely convergence of our algorithm to the optimal solution. Supporting numerical results for both continuous and combinatorial optimization problems are given as well. Our empirical studies suggest that the cross-entropy method has polynomial in the size of the problem running time complexity.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Economic theory 13 (1999), S. 309-327 
    ISSN: 1432-0479
    Keywords: Keywords and phrases: Dynamic programming ; Optimal cycles ; Bifurcations. ; JEL Classification Numbers: C61 ; E32 ; Q20.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Summary. In this paper we study the behavior of optimal paths in dynamic programming models with a strictly convex return function. Such a model has been investigated in Dawid and Kopel (1997) who assume that the growth of a renewable resource is governed by a piecewise linear function. We prove that in their model the optimal cycles undergo the following qualitative changes or bifurcations: a cycle of period n“bifurcates” into a cycle of period n+1 for increasing elasticity of the return function. We also show that under the assumption of a concave differentiable growth function the qualitative properties of the optimal policy remain valid: oscillating behavior is optimal. Furthermore, we demonstrate numerically that the period of a cyclic optimal path increases if the convexity of the return function (measured by the elasticity) increases.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Economic theory 13 (1999), S. 393-416 
    ISSN: 1432-0479
    Keywords: Keywords and Phrases: Endogenous fertility ; Old age support ; Growth. ; JEL Classification Numbers: E13 ; E20 ; E32 ; O41.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Summary. This paper examines the interrelationship between capital accumulation, fertility, and growth by introducing an endogenous fertility decision into Diamond's (1965) neoclassical growth model. Under the assumptions that children provide old age support and that individuals incur a variable time cost of raising children, it investigates the potential for cyclical fluctuations in the capital-labor ratio and fertility, as well as for development trap phenomena to be observed. It is shown that when capital and labor are highly substitutable in production, there is a unique steady state equilibrium, and either damped or undamped oscillations in fertility and the capital-labor ratio may occur. However, when the elasticity of substitution between capital and labor is less than one, two steady state equilibria may exist; one with a high capital-labor ratio and a high rate of population growth, and the other with a lower capital-labor ratio as well as a lower population growth rate. The former is a saddle, while the latter may be either a source or a sink. In the latter case development traps are possible.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of economics 69 (1999), S. 239-266 
    ISSN: 1617-7134
    Keywords: economic growth ; cyclical variability ; creative destruction ; entrenchment ; E32 ; H21 ; L16
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract Newly estaboished firms often try to secure their market position by building up a base of loyal customers. While recessions may not destroy technological leadership, they may be harmful for such firm-customer relationships. Without such customer bases, these firms find themselves more vulnerable to attacks by competitors. We formulate this idea within an Aghion-Howitt-type model of creative destruction and discuss its implications for growth. In the context of this model, recessions might be good for growth since they weaken the incumbent firm's position and, thereby, stimulate research by outside firms. The model allows for the extreme case where the leading firm can be so entrenched that growth ceases, unless a recession shakes up its customer base. We find a one-to-one relationship between the average growth rate and the cyclical variability, a U-shaped relationship between the average speed of building up good customer relationships and the average growth rate, and a positive relationship between the arrival rate of recessions and average growth. It is finally shown that an appropriate stochastic tax program can implement the social planner's solution. In some cases, general-equilibrium effects may generate interesting results, conflicting with intuition from a partial-equilibrium approach: we show that, in some cases, a social planner might want to subsidize research in order to discourage it.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of economics 70 (1999), S. 79-89 
    ISSN: 1617-7134
    Keywords: disequilibrium growth ; regime switching ; Keynesian unemployment ; asymptotic stability ; Hopf bifurcations ; E12 ; E31 ; E32
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract This note shows that non-Walrasian disequilibrium models of monetary growth (which are rare) can be considerably simplified in their dynamics if appropriate flexibilities of market economies are taken into account that help to avoid certain types of rationing of economic agents as they are typical for the non-Walrasian modeling of macrodynamics. We consider and modify accordingly an established example of this type of model building and show that propositions on stability and the loss of stability of the then remaining Keynesian regime are much easier to derive and also much more transparent than in their original non-Walrasian setup with its regime switches right at the steady state of the economy.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of economics 70 (1999), S. 187-207 
    ISSN: 1617-7134
    Keywords: overlapping generations ; general equilibrium ; cycles ; D51 ; D90 ; E32
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract We show that equilibrium cycles in an overlapping-generations model are equivalent to asymmetric equilibria in a general-equilibrium model. We use this equivalence to find equilibrium cycles in the overlapping-generations model with two and three generations, respectively. For the example with two generations we show that for certain parameter values cycles of all periods occur.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1435-8921
    Keywords: Key words: ARMA model ; fractionally integrated ARMA model ; persistence ; spectral density estimation ; JEL classification: C22 ; C51 ; 53 ; E32
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract. Econometric issues in the estimation of persistence in macroeconomic time series are considered. In particular, the relative merits of estimates based on ARMA models, ARFIMA models and nonparametric procedures are investigated. It is shown that ARFIMA models are inappropriate for the purpose of estimating persistence. Furthermore, some of the criticism leveled in the literature against the use of ARMA models for estimating long run properties is put into perspective. Methodological issues arising in the estimation of ARMA models that are relevant to estimation of persistence are discussed. It is shown how overparameterization of an ARMA model may lead to severely downward biased estimates of persistence. The theoretical results are employed to explain some of the findings in Campbell & Mankiw (1987a) and Christiano & Eichenbaum (1990). The methodological aspects of the paper are also relevant for the problem of estimating the value of a spectral density at any given frequency. An empirical study confirms persistence estimates reported in Campbell & Mankiw (1987a), and shows that ARMA models as well as nonparametric procedures give very similar estimates of persistence if properly applied.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Empirical economics 24 (1999), S. 529-535 
    ISSN: 1435-8921
    Keywords: Key words: Business cycles ; serial correlation common feature ; frequency-domain methods ; JEL classifications: C22 ; E32
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract. This paper examines the frequency-domain implications of the serial correlation common feature in order to evaluate its merits as an indicator of common business cycles among economic variables. It is shown that the presence of the serial correlation common feature in the first differences of a set of I(1) time series is not informative for the degree and the lead-lag structure of their comovements at the business cycle frequencies.
    Type of Medium: Electronic Resource
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