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  • 1
    Publication Date: 2016-08-18
    Description: SUMMARYAustralia has a role to play in future global food security as it contributes 0·12 of global wheat exports. How much more can it contribute with current technology and varieties? The present paper seeks to quantify the gap between water-limited yield potential (Yw) and farmer yields (Ya) for wheat in Australia by implementing a new protocol developed by the Global Yield Gap and Water Productivity Atlas (GYGA) project. Results of past Australian yield gap studies are difficult to compare with studies in other countries because they were conducted using a variety of methods and at a range of scales. The GYGA project protocols were designed to facilitate comparisons among countries through the application of a consistent yet flexible methodology. This is the first implementation of GYGA protocols in a country with the high spatial and temporal climatic variability that exists in Australia.The present paper describes the application of the GYGA protocol to the whole Australian grain zone to derive estimates of rainfed wheat yield gap. The Australian grain zone was partitioned into six key agro-climatic zones (CZs) defined by the GYGA Extrapolation Domain (GYGA-ED) zonation scheme. A total of 22 Reference Weather Stations (RWS) were selected, distributed among the CZs to represent the entire Australian grain zone. The Agricultural Production Systems sIMulator (APSIM) Wheat crop model was used to simulate Yw of wheat crops for major soil types at each RWS from 1996 to 2010. Wheat varieties, agronomy and distribution of wheat cropping were held constant over the 15-year period. Locally representative dominant soils were selected for each RWS and generic sowing rules were specified based on local expertise. Actual yield (Ya) data were sourced from national agricultural data sets. To upscale Ya and Yw values from RWS to CZs and then to national scale, values were weighted according to the area of winter cereal cropping within RWS buffer zones. The national yield gap (Yg = Yw–Ya) and relative yield (Y% = 100 × Ya/Yw) were then calculated from the weighted values.The present study found that the national Yg was 2·0 tonnes (t)/ha and Y% was 47%. The analysis was extended to consider factors contributing to the yield gap. It was revealed that the RWS 15-year average Ya and Yw were strongly correlated (R2 = 0·76) and that RWS with higher Yw had higher Yg. Despite variable seasonal conditions, Y% was relatively stable over the 15 years. For the 22 RWS, average Yg correlated positively and strongly with average annual rainfall amount, but surprisingly it correlated poorly with RWS rainfall variability. Similarly, Y% correlated negatively but less strongly (R2 = 0·33) with RWS average annual rainfall, and correlated poorly with RWS rainfall variability, which raises questions about how Australian farmers manage climate risk. Interestingly a negative relationship was found between Yg and variability of Yw for the 22 RWS (R2 = 0·66), and a positive relationship between Y% and Yw variability (R2 = 0·23), which suggests that farmers in lower yielding, more variable sites are achieving yields closer to Yw. The Yg estimates appear to be quite robust in the context of estimates from other Australian studies, adding confidence to the validity of the GYGA protocol. Closing the national yield gap so that Ya is 0·80 of Yw, which is the level of Yg closure achieved consistently by the most progressive Australian farmers, would increase the average annual wheat production (20·9 million t in 1996/07 to 2010/11) by an estimated 15·3 million t, which is a 72% increase. This indicates substantial potential for Australia to increase wheat production on existing farmland areas using currently available crop varieties and farming practices and thus make a substantial contribution to achieving future global food security.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 2
    Publication Date: 2019-03-14
    Description: The main objective of this study is to determine the influence of service quality on satisfaction of football spectators, looking scarcely investigated in the literature. The results, from a sample of 700 spectators at a football club of the Spanish First Division, reveal three main conclusions: (i) the quality of service of a football event is determined by both tangibles - infrastructure - as intangible - quality and delivery of equipment, and management of the board; (ii) the quality of positively affects service satisfaction experienced by the viewer part associated with football event; (iii) in overall satisfaction directly influences partial satisfaction associated with specific aspects of the sporting event and indirectly the quality of services provided. The study concludes with the main contributions, limitations and future research.
    Keywords: M31 ; ddc:330 ; Perceived quality ; Service ; Customer satisfaction ; Sport event ; Football
    Repository Name: EconStor: OA server of the German National Library of Economics - Leibniz Information Centre for Economics
    Language: Spanish
    Type: doc-type:article
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  • 3
    Publication Date: 2018-12-19
    Description: The preoccupation to consider the heterogeneity in firm behavior within an activity sector has been one of the main reasons for the search and identification of strategic groups, generating an inexhaustible debate in the scope of the strategic management. Nevertheless, this preoccupation has not been limited to identify firm archetypes or configurations, but also it has extended to the study of possible differences in performance between the identified groups. In this paper, we tried to answer to this double problem focusing in the scope of franchising. A data base including all the franshisor chains (664) that operated in Spain in 2005 has been elaborated. Results reveal the existence of five strategic groups (types of franchisors) perfectly differentiated, which are described from the strategic variables they define them. Also, the existence of differences between groups with regard to results is shown based on some performance measures (income, ordinary results and profit).
    Keywords: M10 ; M19 ; ddc:330 ; franchising ; franchisors ; strategic groups ; performance ; profit
    Repository Name: EconStor: OA server of the German National Library of Economics - Leibniz Information Centre for Economics
    Language: Spanish
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  • 4
    Publication Date: 2018-12-19
    Description: Franchising system continues its unstoppable advance worldwide, as in the most commercially developed countries as in those that have some more antiquated commercial structures. For that reason, nowadays, this is an important research topic in the business area. Franchising chains expand themselves through own and franchised units, in this context, this work intends to determine what kinds of units are more efficient. Own and franchised units are compared by the following indexes: sales per employee, sales per establishment and employees per establishment. As performances measures has been used: ROI (return on investment), incomes and ordinary results. This field of research has not been developed in Spain and scantly treated in the scientific international literature.
    Keywords: ddc:330 ; franchise system ; franchised units ; own units ; eficiency ; agency theory ; resource scarcity theory ; extension risk theory
    Repository Name: EconStor: OA server of the German National Library of Economics - Leibniz Information Centre for Economics
    Language: Spanish
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