U.S. Dairy Policy and the Agreement on Agriculture in the WTO: Discussion

The views and conclusions expressed in this discussion are those of the author and not those of his institution.     

WTO农业协议与兵团农业结构的战略性调整

加入ＷＴＯ后的兵团农业要面对国内、国际两个市场,该文主要提出了兵团农业怎样按照市场需求和国际质量标准调整农业生产结构、品种结构和产业结构,以及提高农产品质量,增强产品及加工品在国内、国际市场的竞争力的基本思路。     

Scale Economies and Inefficiency of U.S. Dairy Farms

This study employs data drawn from the 2000 Agricultural Resource Management Survey, a U.S. Department of Agriculture-sponsored farmers' survey. The article estimates returns to scale relationships across dairy farms of different sizes and across different regions, incorporating variables hypothesized to influence farm performance. Results point to significant scale economies in U.S. dairy farms and underscore the importance of taking account of inefficiency when estimating scale economies. Contrary to previous research, the preferred cost function specification does not show a region of decreasing returns to scale. This finding helps explain why the average size of dairy farms has been increasing.     

The U.S. Dairy Sector without Price Supports

Under legislation approved in 1996, the U.S. dairy price support program would end on 31 December 1999. While U.S. dairy markets would continue to be protected by import tariffs and export subsidies, the previous floor under market prices would be removed. Given the prospective market situation, model results indicate that removing the price support program would have only modest impacts on the U.S. dairy industry. Prices of nonfat dry milk may be lower without the price support program than they would be if the program continued, but the net impact on milk prices and production would be small. Unless world demand is substantially stronger than projected or unless U.S. supplies are much larger, unsubsidized U.S. exports of products such as butter and nonfat dry milk appear unlikely. Niche markets and changes in relative values of milk components, however, may offer other U.S. dairy export opportunities. En vertu d'une loi agricole approuvée par les États-Unis en 1996, le régime de soutien des prix des produits laitiers devait se terminer le 31 décembre 1999. Même si les marchés laitiers américains continueraient àêtre protégés par des tarifs douaniers à l'importation et par des subventions à l'exportation, le prix plancher en place serait enlevé. Vu la situation prospective du marché, les résultats modélisés font voir que le retrait du régime de soutien des prix n'aurait que des impacts modestes sur le secteur laitier américain. Les prix de la poudre de lait écrémé seraient peut-être plus bas que si le régime avail été maintenu, maisl'impact net sur les prix du lait et sur la production laitière serait faible. À mains que la demande mondiale n'augmente sensiblement plus que prévu ou que les stocks américains ne soient beaucoup plus importants, il est peu probable que des exportations non subventionnées de produits comme le beurre et la poudre de lait écrémé voient le jour dans le proche avenir. Toutefois, le développement de certains créneaux du marché et les changements affectant les valeurs relatives des composants laitiers pourraient se traduire par d'autres possibilitiés d'exportation pour les produits laitiers américains.     

Environmental Regulation and the Spatial Structure of the U.S. Dairy Sector

Substantial public scrutiny about adverse environmental impacts of the dairy sector has resulted in increased environmental regulations. A behavioral model of location and production is developed to examine the impacts of environmental regulations, traditional location factors, and agglomeration economies on the spatial structure and geographical location of dairy production. The results show that counties in the states with more stringent environmental regulations tend to lose dairy inventories to those with less stringent policies. There are substantially meaningful spatial patterns of dairy production. Current dairy production levels are positively correlated while changes in production levels are negatively correlated across counties.     

Threshold Effects and Asymmetric Price Adjustments in U.S. Dairy Markets

Recent volatility in food prices and the growing disparity between prices at various stages of the marketing channel has generated much interest among agricultural producers, consumers, and policy makers. This study examines the effect of nonlinear threshold dynamics on asymmetric price transmission for three U.S. dairy products (butter, cheese, and fluid milk) using threshold error correction models. The empirical result suggests that price transmission of changes between producer and retail stages of the marketing chain is asymmetric for butter and fluid milk, but not for cheese prices. Also, this paper's findings indicate that conclusions about price asymmetries depend on the model specification assumptions made about symmetry and threshold effects. Thus, previous studies that assumed symmetric behavior and ignored threshold effects may be misleading. La récente volatilité des prix des produits alimentaires et la disparité croissante entre les prix observés aux divers échelons du réseau de distribution ont suscité l'attention des producteurs agricoles, des consommateurs et des décideurs. La présente étude examine l'effet d'une dynamique non linéaire avec seuil sur la transmission asymétrique des prix dans le cas de trois produits laitiers aux États‐Unis (le beurre, le fromage et le lait de consommation), à l'aide de modèles à correction d'erreur avec seuil. Les résultats empiriques montrent que la transmission des variations de prix entre les producteurs agricoles et les détaillants est asymétrique dans le cas du beurre et du lait de consommation, mais ne l'est pas dans le cas du fromage. D'après les résultats de la présente étude, les conclusions concernant l'asymétrie des prix dépendent des hypothèses posées sur la symétrie et les effets de seuil. Par conséquent, les études antérieures dans lesquelles on a supposé un comportement symétrique et ignoré les effets de seuil pourraient induire en erreur.     

The Adoption and Impact of Bovine Somatotropin on U.S. Dairy Farms

Data from a national survey representative of U.S. dairy operations were used to assess adoption and the production and financial impacts of recombinant bovine somatotropin (rbST). Adoption rates of rbST varied significantly across the nation, but were higher among larger diary operations in all regions. However, the scale bias of rbST adoption was substantially diminished when the influence of location and the use of related technologies were measured. An increase in milk production per cow was associated with rbST adoption, but estimated financial impacts were not statistically significant due to substantial variation in the net returns of rbST adopters.     

美国棉花产业政策的思考与启示

棉花产业政策是影响棉花产业持续发展的重要因素。本文通过回顾美国棉花产业政策经历的传统政策阶段、政策变革阶段、新政策的调整三个阶段,分析了美国棉花产业政策的特点,揭示了产生的一系列有效调控效应,从中总结出对我们有益的启示与借鉴。     

Trade Liberalization,Policy Reform and the U.S. Sugar Industry

This study examines the prospects for and potential impacts of liberalized international trade in sugar. It utilizes a state specific, cost of production based estimate of U.S. sugar supply to examine producer surplus under the current sugar policy regime and under a free trade scenario. It also evaluates the long-term viability of sugar production in individual states at free market prices.     

Stability of Farm Income and the Role of Nonfarm Income in U.S. Agriculture

This study measures the variability in real net farm income in the U.S. agricultural sector and per farm and determines if variability has diminished over 1933 to 1999. Second, the role of nonfarm income in reducing the variability in total farm household income is examined. Results indicate that the variability in real net farm income in the sector and at the farm level has not diminished and that nonfarm income has helped to reduce the variability in total farm household income.     

The U.S. Sugar Policy Reforms and World Sugar Trade

This article incorporates the U.S. sugar policy instruments in a spatial Nash equilibrium model of world sugar trade and simulates the consequences of the U.S. sugar policy reforms on sugar trade among major producing and consuming regions of the world. The results show that policy reforms which eliminate import barriers by the U.S. can lead to major changes in the directions and volumes of sugar trade. Specifically, U.S. sugar imports would increase but domestic production and consumer prices would decline. Several regions in the developing world would increase their shares of the world sugar export trade.     

Incidence of the 1996 Canada–U.S. Softwood Lumber Agreement and the Optimal Export Tax

Our partial-equilibrium analysis suggests 63% of the Canada-U.S. Softwood Lumber Agreement's export tax is absorbed by Canadian consumers. Still, sufficient surplus was extracted from U.S. consumers for the agreement to be in Canada's national interest. In fact, the agreement was suboptimal from a Canadian perspective in that a higher tax rate would have raised national welfare, at least in the short run. Although the agreement decreased U.S. welfare, the net loss for the combined U.S. and Canadian economies is modest, about 5% of the bilateral softwood lumber trade value according to our baseline estimates. This suggests the agreement's tariff rate quota scheme is a reasonably efficient mechanism for redistributing economic surplus from U.S. consumers to producers. Still, a better policy may be to enlarge the softwood lumber market via a research and promotion program funded by a modest (say, 5%) tax on Canadian exports.