Technical efficiency and farm size: a conditional analysis

The relationship between technical efficiency and size might be affected by farm heterogeneity. We analyse this relationship conditional on a set of control variables. These control variables are chosen using a production model where technical efficiency is introduced as a parameter. As a result, technical efficiency affects both the input demand and the output supply of a profit maximising producer. The empirical application explores these issues using panel data of dairy farms in Spain.     

Quotas, Alternative Technologies and Immiserization

This paper studies the relationships between technical change and welfare under a production quota regime. The conditions for producer impoverishment and quota owner impoverishment under technical change are identified. Whether the relative efficiency of a marketable quota regime is robust to the choice of technologies is also considered, as is the immiserization motive for banning a technology. The paper demonstrates that two or more technologies may exist in equilibrium and that the adoption of a technology may depend on the marketability of quota.     

Some lessons from the modelling of the Spanish rice market

Spanish accession to the European Comminity (EC) will lead to many changes in Spain's agricultural sector. Predicting the nature of these changes is difficult because the new policy regime differs significantly from historic Spanish policies. In this paper, conventional econometric models of the Spanish rice sector are constrated with a model designed specifically to reflect the pervasive impact of Spanish rice policies. This policy model predicts the historical evolution of production, consumption and trade more accurately than the conventional models. However, the policy model cannot be used to predict the impact of the radical policy changes in Spain resulting from the introduction of the EC rice regime because the historical relationships no longer hold. It is argued that alternative approaches relying more on institutional analysis and expert opinion need to be developed to understand the future of the Spanish rice sector.     

Some Lessons from the Modelling of the Spanish Rice Market

Spanish accession to the European Comminity (EC) will lead to many changes in Spain's agricultural sector. Predicting the nature of these changes is difficult because the new policy regime differs significantly from historic Spanish policies. In this paper, conventional econometric models of the Spanish rice sector are constrated with a model designed specifically to reflect the pervasive impact of Spanish rice policies. This policy model predicts the historical evolution of production, consumption and trade more accurately than the conventional models. However, the policy model cannot be used to predict the impact of the radical policy changes in Spain resulting from the introduction of the EC rice regime because the historical relationships no longer hold. It is argued that alternative approaches relying more on institutional analysis and expert opinion need to be developed to understand the future of the Spanish rice sector.     

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.     

The Effect of the Northeast Dairy Compact on Producers and Consumers, with Implications of Compact Contagion

We model and measure the effects of the Northeast Dairy Compact on prices, quantities, and producer and consumer welfare, underscoring the distribution of these effects across regions and among producers and buyers. Using 1999 as a base year, simulations show that the Compact raised the farm price of milk in the Northeast by $0.45/cwt, lowered the farm price of milk in the rest of the country by $0.02/cwt, and transferred income from producers outside the Compact region and buyers in the Compact region to producers in the Compact region. Non-Compact producer losses exceeded Compact producer gains. Similar results are found for a scenario of Compact contagion—extension of the Compact to include additional states. In both cases, the Compact changed the distribution of the costs and benefits of price discrimination as practiced by milk marketing orders. The regional distribution of the Compact's welfare effects raises again the question of the organization and stability of the federal milk marketing order system.     

我国小麦生产成本收益分析

[目的]近年来,随着中国经济和农业的不断发展,我国已经成为世界上最大的小麦生产、消费国。小麦市场的变动会对我国粮食产业产生巨大影响,因此,对小麦生产成本收益的变化进行探究,可以从整体上把握小麦产业的生产情况,便于国家、厂商以及农户做出适当的调整措施,促进我国小麦产业的可持续性发展。[方法]文章通过对全国农产品成本资料收益汇编数据及农业农村部2018年主产区小麦调研数据进行分析,探讨2012—2017年我国小麦成本收益变化趋势。[结果]我国小麦生产总成本快速增长,总成本从2012年的830.44元/hm~2上涨至2017年的1 007.64元/hm~2,化肥费、机械作业费、人工成本、土地成本在总成本中所占比重较大。小麦的产值与现金收益虽然保持增长,但净利润与成本利润率呈下降趋势,总成本的增长速度快于总收益的增长速度。[结论]小麦生产成本收益变化的原因为小麦产量减少、生产成本上升以及市场价格降低,并且提出了依靠科技提高小麦产量、维护农资市场价格稳定等一系列针对性的建议与措施。     

Production & trade structure and accession to the EC: The case of Greek agriculture

Summary

Greece's climatic and soil conditions, together with the size structure of its farms favour the production of Mediterranean‐type products, in which the country has a comparative advantage. However, the structure of agricultural production and exports has been changing, at least since 1961, when Greece became an Associate Member of the EC, with a shift from traditional crops (tobacco, cotton, olive oil and dried vine fruit), towards fruit and vegetables especially of late towards early varieties which do not coincide seasonally with EC production as well as certain “Northern” products (wheat, maize, and barley). Despite a substantial increase in livestock production, imports of meat, and dairy products have grown considerable faster than imports of other agricultural produce.

By presenting these trends, this paper attempts to show that in the post ‐ EC membership period (after 1.1.1981) developments in agricultural production and trade cannot be attributed to membership, since they had appeared long before it. This evidence also indicates that the above trends are not likely to change significantly within the EC in the future.     

Ex Ante Research Evaluation and Regional Trade Flows: Maize in Kenya

Public sector investment in agricultural research is an important component of developing country efforts to bolster staple cereal production in the face of rapid population growth. This paper uses a spatial equilibrium model to evaluate the potential impact of maize research in six regions of Kenya. The application highlights the important role of research in meeting future food needs, as well as the geographic variability of producer and consumer benefits from technology and trade policy options. Despite significant research induced supply shifts, Kenya will require additional production increases of 1.5 to 2 per cent per year to meet stated goals of self-sufficiency in maize production with open markets. Import restrictions can ensure self-sufficiency and generate producer welfare gains at greater expense to the majority of Kenyans who are net consumers of maize. In the debate over trade policy, public sector investments in maize research should be seen as a potential mechanism to compensate producers for welfare losses associated with market liberalisation.     

Elasticity of demand for Australian cotton in Japan

Although a relatively small producer, Australia exports more than 90 per cent of its cotton production, making it the world's third largest cotton exporter in recent years. This means that export performance plays a major role in determining the profitability of the Australian cotton industry. The primary aim of this study was to determine the competitive position of Australian cotton in the Japanese market, based on the original non-linear Almost Ideal Demand System model using data from 1972 to 1998. The main findings are that the USA had a relatively strong market position and that Australia needs to improve its cost competitiveness and quality image to advance its market standing.     

Cash cropping and food crop productivity: synergies or trade‐offs?

The case for promoting export‐oriented cash crops in Africa has generally been based on their direct potential contribution to agricultural productivity and small farmer incomes. A relatively neglected avenue of research concerns the synergistic effects that cash cropping can have on other household activities, including food production. The conventional view that cash crops compete with food crops for land and labour neglects the potential for cash crop schemes to make available inputs on credit, management training, and other resources that can contribute to food crop productivity, which might otherwise not be accessible to farmers if they did not participate in cash crop programs. This article builds on previous research by hypothesising key pathways by which cash crops may affect food crop activities and empirically measuring these effects using the case of cotton in Gokwe North District in Zimbabwe. Analysis is based on instrumental variable analysis of survey data on 430 rural households in 1996. Results indicate that—after controlling for household assets, education and locational differences—households engaging intensively in cotton production obtain higher grain yields than non‐cotton and marginal cotton producers. We also find evidence of regional spill‐over effects whereby commercialisation schemes induce second round investments in a particular area that provide benefits to all farmers in that region, regardless of whether they engage in that commercialisation scheme. The study suggests that the potential spill‐over benefits for food crops through participation in cash crop programs are important to consider in the development of strategies designed to intensify African food crop production.     

Why Do Some Bt-Cotton Farmers in China Continue to Use High Levels of Pesticides?

China was the first developing country to introduce Bt cotton on a large scale. This paper provides an indepth economic analysis of Bt cotton production by small-scale farmers in China. Data were collected in 2002 in Linqing County, in Shandong Province and comprised a season-long cotton production monitoring with 150 farmers and complementary household interviews. For quality assessment, the Bt toxin concentration of the various Bt varieties used by the farmers was determined for each plot. All farmers were growing insect resistant Bt cotton varieties. Yet, they sprayed high amounts of chemical insecticides, out of which 40% were extremely or highly hazardous. The paper reviews methodological issues inherent to impact assessment of crop biotechnology and identifies market and institutional failure as possible reasons for continued high pesticide use. Using the damage function methodology the coefficients for both damage control inputs, i.e., Bt varieties (measured as toxin concentration), and insecticide quantity were not significantly different from zero. Results show that absence of enabling institutions and lack of farmer knowledge can considerably limit the benefits of Bt cotton for small-scale farmers. The paper points out the importance to include the institutional conditions in the evaluation of agricultural biotechnology in developing countries.     

Institutional Environment and Technical Efficiency: A Stochastic Frontier Analysis of Cotton Producers in West Africa

This paper examines the effects of the institutional environment on West African cotton farmers’ technical efficiency (TE). First, key aspects of the cotton sector institutional environment are discussed, including input and credit access, and producers’ organisations. Then, a stochastic frontier production function, which incorporates technical inefficiency effects, is applied to farm level data collected in Benin, Burkina Faso and Mali. The survey includes farmers’ evaluations of the cotton sector institutional environment. Results suggest that institutional level features influence producers’ TE, besides farm‐level characteristics. Cotton growers who report a negative experience with the joint liability programme, who identify the cotton price mechanism or access to credit as the main constraints to performance, and who cultivate more hectares of cereals are technically more inefficient in producing cotton. Findings suggest that cotton farmers in Mali are less technically efficient in producing cotton than in Burkina Faso and Benin. Agricultural development policies focusing on reducing farmers’ financial stress, particularly through the establishment of adequate price mechanisms (i.e. higher farm‐gate prices and timely payments to farmers) and improvement in the input–credit markets should be encouraged to improve TE in West Africa.     

新冠肺炎疫情对我国粮食安全的影响分析及稳定产量的建议

稳定粮食安全根基是应对各类黑天鹅、灰犀牛事件的有力保障。疫情期间,充足的粮食供给再次发挥了安天下、稳民心的作用。从目前调查的情况来看,疫情对粮食生产经营的影响是暂时的、局部的、有限的,疫情持续也带来农资价格上涨、物资到位迟缓等问题。但种粮效益低、农业气象偏差、传统病虫害与输入性虫害叠加、国际经贸形势日趋复杂等挑战交织,是确保全年粮食产量、供应稳定的主要挑战。要高度重视抗疫战线拉长带来的负面影响,积极疏通农资供应渠道、有序组织返田返工,更要稳住政策支持,完善设施装备配套,强化技术支撑,做好防灾减灾。     

世界软体动物主要物种组产量变动趋势研究

过去60余年来,世界软体动物主要物种组产量呈现出总体稳定增长、个别年份有所波动的趋势。1990年以前10年期产量增幅均超过35％,20世纪90年代增长最快,2000—2008年间增幅变小。20世纪70年代初9养殖产量超过捕捞产量,2008年在主要物种组产量中所占份额高达86％。2008年,各物种组按产量高低排序为蛤类、牡蛎、扇贝、贻贝、鲍鱼和螺类,各大洲按产量高低排序为亚洲、美洲和欧洲,前10大生产国为中国、日本、美国、韩国、泰国、智利、法国、西班牙、意大利、加拿大。     

Bt Cotton,Pesticide Use and Environmental Efficiency in Pakistan

There is a broad literature on the impact of Bt cotton adoption in different countries, but few studies have explicitly looked at environmental and health effects from an economic perspective. We analyse the impact of Bt cotton on environmental efficiency in Pakistan, using farm survey data and a doubly heteroskedastic stochastic production function framework. Negative environmental and health effects of chemical pesticide use are quantified with the environmental impact quotient. Bt‐adopting farms have higher cotton yields, while using lower pesticide quantities and causing less environmental damage. Bt farms are both technically and environmentally more efficient than non‐Bt farms. Bt adoption increases environmental efficiency by 37%. Achieving the same reduction in negative environmental and health impact without Bt would cost conventional cotton farmers US$ 54 per acre in terms of foregone yields and revenues (7% of total revenues). Extrapolating this shadow price of the technology's health and environmental benefits to the total Bt cotton area in Pakistan results in an aggregate value of US$ 370 million. These benefits are in addition to the profit gains for Bt‐adopting farmers. Our results suggest that Bt technology can contribute to sustainable agricultural development.     

Price transmission in the Spanish bovine sector: the BSE effect

A regime-switching vector error correction model is applied to monthly price data to assess the impact of Bovine Spongiform Encephalopathy (BSE) outbreaks on price relationships and patterns of transmission among farm and retail markets for bovines in Spain. To evaluate the degree to which price transmission is affected by BSE food scares, a BSE food scare index is developed and used to determine regime switching. Results suggest that BSE scares affect beef producers and retailers differently. Consumer prices are found to be weakly exogenous and not found to react to BSE scares, while producer prices are conversely adjusted. The magnitude of the adjustment is found to depend on the magnitude of the BSE scare.     

Wheat Policy Options in Sub-Saharan Africa: The Case of Zimbabwe

Like many countries in sub-Saharan Africa, Zimbabwe is experiencing rapid growth in wheat consumption and imports. Policy makers in Zimbabwe and elsewhere must decide whether increased domestic wheat production might reduce dependency on imports and at the same time contribute to economic efficiency and food security goals. The domestic resource cost framework was used to assess Zimbabwe's comparative advantage among six major irrigated crops and to measure the effects of current government policies on producer incentives. The results indicate that irrigated wheat production represents an efficient use of Zimbabwe's resources during times of abundant rainfall, but the nation enjoys a comparative advantage in tobacco, maize, and cotton production during times of water scarcity. Existing agricultural policies provide disincentives for commercial farmers, because private profitability is less than social profitability for the major irrigated crops. However, this tax occurs across all commodities with similar incidence, so that the private incentives among crops are not greatly distorted from their social pattern. Sensitivity analysis confirms the robustness of these findings under a range of possible future economic and political developments. The domestic resource cost approach used in this study provides an operational method for measuring comparative advantage and should be of interest to policy analysts throughout sub-Saharan Africa.     

Vertical integration in West Africa's cotton industry: are parastatals a second best solution?

This article provides a framework to compare market outcomes among vertically integrated monopsonies in the cotton sector of West Africa and alternative, more competitive market structures. Based on a principal agent framework, in the presence of factor market constraints, as well as capital market failure, efficiently operated cotton parastatals increase sector welfare and efficiency by providing input credits. In equilibrium, outcomes with the principal agent model suggest growers receive the reservation income to participate in cotton production while the principal (cotton company) extracts the surplus above the reservation income. Competitive markets entail more equitable distribution of benefits than with parastatal vertical integration, but credit and factor market constraints can still persist. Promotion of a competitive market system will not support cotton productivity growth unless stakeholders pursue complementary programs to develop credit markets and research and extension institutions. In the presence of current market failures, parastatals may be a second‐best solution.