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Registros recuperados: 28
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A GENERALIZED DISTANCE FUNCTION AND THE ANALYSIS OF PRODUCTION EFFICIENCY AgEcon
Chavas, Jean-Paul; Cox, Thomas L..
A generalization of Shephard's distance functions is proposed, extending the usefulness of distance functions in economic analysis. Applications to efficiency measurements and productivity analysis are presented. New indexes of productivity, and technical, allocative and scale efficiency are proposed and analyzed. Interpretation of these indexes in terms of ray-average cost, ray-average revenue, and cost-to-revenue ratio is discussed.
Tipo: Working or Discussion Paper Palavras-chave: Production Economics.
Ano: 1999 URL: http://purl.umn.edu/12601
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A NONPARAMETRIC ANALYSIS OF THE SOURCE AND NATURE OF TECHNICAL CHANGE: THE CASE OF U.S. AGRICULTURE AgEcon
Chavas, Jean-Paul; Aliber, Michael; Cox, Thomas L..
Tipo: Working or Discussion Paper Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1994 URL: http://purl.umn.edu/12660
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A PRIMAL-DUAL APPROACH TO NONPARAMETRIC PRODUCTIVITY ANALYSIS: THE CASE OF U.S. AGRICULTURE AgEcon
Chavas, Jean-Paul; Cox, Thomas L..
Nonparametric methods for measuring productivity indexes based on bounds for the underlying production technology are presented. Following Banker and Maindiratta, the lower bound is obtained from a primal approach while the upper bound corresponds to a dual approach to nonparametric production analysis. These nonparametric bounds are then used to estimate input-based and output- based distance functions. These radial measures provide the basis for measuring productivity indexes. Application to times series data on U.S. agriculture indicates a large gap between the primal lower bound and the dual upper bound. This generates striking differences between the primal and dual nonparametric productivity indexes.
Tipo: Working or Discussion Paper Palavras-chave: Productivity Analysis.
Ano: 1994 URL: http://purl.umn.edu/12613
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An Economic Analysis of the Impacts of Trade Liberalization on Asian Dairy Market AgEcon
Peng, Tingjun; Cox, Thomas L..
The objective of this paper is to develop an economic analysis of the impacts of further trade liberalization on Asian dairy markets. In order to achieve this, we first make a review of Asian dairy policies from the perspective of domestic support, market access and export subsidy. Then a world dairy model is employed, which reflects both vertical and spatial characteristics of the world dairy sector. We analyze the separate and combined impacts of eliminating Japan's domestic dairy subsidy, removing other Asian countries dairy trade policies excluding Japan, eliminating all Asian countries domestic dairy and trade policies, and multilateral dairy trade liberalization around the world. We find that Japan and Korea's producers will suffer much bigger losses...
Tipo: Working or Discussion Paper Palavras-chave: International Relations/Trade.
Ano: 2005 URL: http://purl.umn.edu/12630
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ANALYSIS OF RECENT OPTIONS FOR CHANGES IN U.S. DAIRY POLICY AgEcon
Cox, Thomas L.; Sumner, Daniel A..
Tipo: Conference Paper or Presentation Palavras-chave: Agricultural and Food Policy.
Ano: 1996 URL: http://purl.umn.edu/16967
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DAIRY DISPUTES IN NORTH AMERICA: A CASE STUDY AgEcon
Cox, Thomas L.; Le Roy, Danny G.; Goddard, Ellen W..
Tipo: Conference Paper or Presentation Palavras-chave: Agribusiness; International Relations/Trade.
Ano: 2001 URL: http://purl.umn.edu/16847
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ESTIMATION OF A U.S. DAIRY SECTOR MODEL BY MAXIMUM SIMULATED LIKELIHOOD AgEcon
Arias, Carlos; Cox, Thomas L..
This paper estimates a multivariate tobit system of monthly wholesale dairy prices where 4 prices are lower censored by the dairy price support program. Using Maximum Simulated Likelihood (MSL) we test/correct for the effects of simulation noise and present two tests for estimating multivariate versus the singel tobit equations.
Tipo: Conference Paper or Presentation Palavras-chave: Demand and Price Analysis; Research Methods/ Statistical Methods.
Ano: 1998 URL: http://purl.umn.edu/20804
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ESTIMATION OF A U.S. DAIRY SECTOR MODEL BY MAXIMUM SIMULATED LIKELIHOOD AgEcon
Arias, Carlos; Cox, Thomas L..
This paper estimates a multivariate Tobit system of monthly wholesale dairy prices where 4 prices are lower censored by the dairy price support program. Using Maximum Simulated Likelihood (MSL) we test/correct for the effects of simulation noise and discuss the relevance of estimating multivariate versus the single Tobit equations.
Tipo: Working or Discussion Paper Palavras-chave: Livestock Production/Industries.
Ano: 1998 URL: http://purl.umn.edu/12617
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Federal Order Reform: The Final Rule AgEcon
Cox, Thomas L.; Cropp, Robert A..
Tipo: Working or Discussion Paper Palavras-chave: Agricultural and Food Policy.
Ano: 1999 URL: http://purl.umn.edu/12693
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HOUSEHOLD DEMAND FOR FRESH POTATOES: A DISAGGREGATED CROSS-SECTIONAL ANALYSIS AgEcon
Cox, Thomas L.; Ziemer, Rod F.; Chavas, Jean-Paul.
A model of household fresh potato consumption incorporating prices, income, family size and other socioeconomic effects is estimated by maximum likelihood Tobit procedures. The effects of truncation bias due to non-purchasing households are evaluated and decompositions of the Tobit elasticities are performed for various sub-groups of the data. The market development implications of this type of disaggregated commodity analysis are explored.
Tipo: Journal Article Palavras-chave: Demand and Price Analysis; Food Consumption/Nutrition/Food Safety.
Ano: 1984 URL: http://purl.umn.edu/32373
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Interregional Analysis of Federal Milk Marketing Order Reform Proposals: Results From the UW-Madison Dairy Interregional Competition Model (IRCM95) AgEcon
Cox, Thomas L..
Tipo: Working or Discussion Paper Palavras-chave: Agricultural and Food Policy; Livestock Production/Industries; Marketing.
Ano: 1998 URL: http://purl.umn.edu/12721
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Interregional Analysis of Interstate Dairy Compacts AgEcon
Cox, Thomas L.; Cropp, Robert A.; Hughes, Will.
Tipo: Working or Discussion Paper Palavras-chave: Livestock Production/Industries; Marketing.
Ano: 1999 URL: http://purl.umn.edu/12728
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INTERREGIONAL ANALYSIS OF THE IMPACTS OF DEREGULATION ON U.S. DAIRY SECTOR AgEcon
Cox, Thomas L.; Chavas, Jean-Paul.
The late 1990's is a period of substantive change in U.S. dairy policy with respect to import quotas, export subsidies, and classified pricing under state and federal milk marketing orders. An interregional model of the U.S. dairy sector is used to provide quantitative measures of the regional impacts of alternative deregulation scenarios.
Tipo: Conference Paper or Presentation Palavras-chave: Agricultural and Food Policy; Livestock Production/Industries.
Ano: 1998 URL: http://purl.umn.edu/20900
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INTERREGIONAL ANALYSIS OF THE IMPACTS OF ELIMINATING EUROPEAN UNION MILK PRODUCTION QUOTAS AgEcon
Bouamra-Mechemache, Zohra; Chavas, Jean-Paul; Cox, Thomas L.; Requillart, Vincent.
An hedonic spatial equilibrium model of the European Union dairy sector is used to evaluate the interregional impacts of eliminating milk production quotas under a variety of domestic policy (intervention prices and domestic production/consumption subsidies) and trade policies (tariff rate quotas and export subsidies). The simulation results indicate that the removal of the EU milk production quotas is welfare improving both only with substantial liberalization of trade. Hence, production quota removal by itself is not a desirable policy alternative for either the EU or the world. Rather, policy reform should involve the joint consideration of domestic and trade policy instruments.
Tipo: Conference Paper or Presentation Palavras-chave: Agricultural and Food Policy; Livestock Production/Industries.
Ano: 2001 URL: http://purl.umn.edu/20677
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ISSUES IN DATA MANAGEMENT OF EXPENDITURE SURVEYS: AN EXAMPLE FROM THE COLOMBIAN 1984-85 URBAN SURVEY AgEcon
Perali, Carlo Federico; Cox, Thomas L..
This study examines some of the issues that are often encountered when analysing the socio-economic information of expenditure surveys using the Colombian 1985 urban expenditure survey as an example. This study discusses the problem of estimating prices when only information on expenditures and demographic characteristics is available, the options available when aggregating commodities and defining demographic or labour information, and the advantages and drawbacks in choosing total expenditure as a proxy for income or as the metric for poverty measurement. The study also applies non-parametric density estimation as a form of exploratory data analysis and as a means to learn from the data about the most proper parametric specification.
Tipo: Working or Discussion Paper Palavras-chave: Research Methods/ Statistical Methods.
Ano: 1995 URL: http://purl.umn.edu/12683
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MAXIMUM SIMULATED LIKELIHOOD: A BRIEF INTRODUCTION FOR PRACTITIONERS AgEcon
Arias, Carlos; Cox, Thomas L..
This paper discusses the increasing importance of probability simulation methods in the context of Maximum Simulated Likelihood. Three probability simulators are analyzed following their chronological order of appearance. This analysis provides an intuitive approach to the basic idea behind probability simulation, the successive improvements and probable future developments. The paper pays special attention to the role of simulation noise in Maximum Simulated Likelihood.
Tipo: Working or Discussion Paper Palavras-chave: Research Methods/ Statistical Methods.
Ano: 1999 URL: http://purl.umn.edu/12662
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MEASURING PRODUCTIVITY GROWTH IN AUSTRALIAN BROADACRE AGRICULTURE AgEcon
Mullen, John D.; Cox, Thomas L..
An important source of growth for Australian broadacre agriculture has been technical progress. We compare alternative measures of productivity growth including the traditional Tornqvist-Thiel total factor productivity index; variants of this approach that allow decreasing returns to scale; the Fisher ideal index; other nonparametric measures that do not impose particular functional forms and an econometric estimate from a translog industry cost function. The annual growth in productivity in broadacre agriculture over the period from 1953 to 1994 was in the range of 2.4 to 2.6 per cent and hence was quite robust to measurement technique.
Tipo: Journal Article Palavras-chave: Productivity Analysis.
Ano: 1996 URL: http://purl.umn.edu/22365
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Nonparametric measures of the impact of public research expenditures on Australian broadacre agriculture AgEcon
Cox, Thomas L.; Mullen, John D.; Hu, Wensheng.
Nonparametric methods are used to measure the impact of public research expenditures on Australian broadacre agriculture over the 1953–94 period. Results using both unrestricted and 30‐year lagged specifications of the research impacts on productivity suggest that while certain aspects of the nonparametric multi‐input/output technologies are quite robust to alternative specifications (in particular, the associated Malmquist total factor productivity indexes), other aspects are less stable (in particular, the indexes on input and, to a lesser extent, output biased technical change). Internal rates of return to research expenditures on Australian broadacre agriculture are estimated to be in the 12 per cent to 20 per cent range.
Tipo: Journal Article Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 1997 URL: http://purl.umn.edu/118046
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NONPARAMETRIC MEASURES OF THE IMPACTS OF PUBLIC RESEARCH EXPENDITURES ON AUSTRALIAN BROADACRE AGRICULTURE: PRELIMINARY RESULTS AgEcon
Cox, Thomas L.; Mullen, John D.; Hu, Wensheng.
Nonparametric methods are used to measure the impacts of public research expenditures on Australian broadacre agriculture over the 1953-94 period. The data and methods used were unable to recover separate impacts due to extension under several alternative specifications. Preliminary results using both unrestricted and 30 year lagged specifications of the research impacts on productivity suggest that while certain aspects of the recovered multi-input/output technologies are quite robust to alternative specifications (in particular, the associated Malmquist total factor productivity indexes), other aspects are less stable (in particular, the indexes on input (and to a lesser extent, output) biased technical change).
Tipo: Working or Discussion Paper Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1996 URL: http://purl.umn.edu/12656
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ON MARKET EQUILIBRIUM ANALYSIS AgEcon
Chavas, Jean-Paul; Cox, Thomas L..
The paper develops the implications of competitive market equilibrium for production and household behavior when some prices are endogenously determined. The properties of market equilibrium functions are explored, including the effects of pricing policy. A Slutsky-type equation relating compensated and uncompensated market equilibrium functions is derived. Implications for multi-market welfare analysis are presented, focusing on the effects of pricing policy and technical change.
Tipo: Working or Discussion Paper Palavras-chave: Industrial Organization.
Ano: 1996 URL: http://purl.umn.edu/12615
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