Linking technical change to research effort: an examination of aggregation and spillovers effects

We used a disaggregate approach to examine investment efficiency of wheat breeding research in India. India's total research effort comprizes 20 research programs spread across 50 experiment stations. A technology spillover matrix was constructed for both potential and actual spillovers. Spillovers and free‐riding were dominant characteristics of technical change during the period studied. Although the aggregate rate of return to wheat improvement research in India was estimated to be 55%, eight programs were found to have earned a negative rate of return when spillins were taken into account. Research output is concentrated on a few strong programs. The two strongest programs generated 75% of all the technical change benefits, even though they claimed just 22% of research resources. These two programs include a significant degree of overlap, while on the other hand many farmers were not reached by any of the programs – 56 and 78% of rainfed and durum area, respectively, in 1990 was still sown with pre‐1976 varieties.     

Efficiency of research investments in the presence of international spillovers: wheat research in developing countries⋆

Expenditures on agricultural research in the public sector, including the International Agricultural Research Centers (IARCs) have stagnated and in some cases, declined sharply in recent years. This has focused attention on issues of efficiency of agricultural research systems, especially the number, size, scope, type, and locations of their programs. This paper examines the issue of research efficiency through a case study of wheat improvement research in developing countries. The basic premise of this study is that the optimal level of research investment should be determined in a global model that incorporates direct research spill‐ins. An analytical framework is developed to determine the threshold levels of crop production in a country (or a region within a country) needed to justify crop improvement research programs of different sizes in the presence of spill‐ins from abroad. Spill‐in coefficients are estimated from yield performance of varieties of different origins grown across a range of environments. The model is then applied to analyze the efficiency of current investments in 69 wheat improvement research programs in 35 developing countries. A major conclusion of the paper is that given the magnitude of potential spill‐ins from the international research system, many wheat research programs could significantly increase the efficiency of resource use by reducing the size of their wheat research programs and focusing on the screening of varieties developed elsewhere. ©2000 Elsevier Science B.V. All rights reserved.     

明清晋陕地区民间水利事务管理探析

晋陕地区地处典型的欧亚大陆性季风气候区,年降水量偏少且呈明显的季节性分布,农作物生长、丰收对人工灌溉的依赖很大。明清时期,伴随着水资源短缺的严峻形势和官方对水利事务管理的收缩,晋陕两地农村水利事务呈现出以乡绅为领导核心的民间管理趋势,水利规约成为民间水利事务管理的制度形式。民间水利事务管理模式的运行,减少并弱化了成员在用水过程中的投机行为、降低了水利纠纷发生的可能性和水利纠纷的诉讼成本。但是,监督体制的缺失和普通农民参与管理的能力不足,使得这种管理方式的效用发挥是有限度的。因此,以史为鉴,协调好国家政权、乡村精英和普通民众的关系,重视民间力量,最大程度地发挥农民阶层的水资源自主管理作用,是解决好水资源开发、利用和管理的有效途径。     

A Water Bank Game with Fishy Externalities

This article describes a classroom game used in a minicourse on economics for Environmental Studies students. The game, inspired by the operation of the Idaho Water Bank and the rising importance of water rights trades in the region, features a double oral auction in which farmers sell diversion rights and hydroelectric companies buy them. The increased in-stream flows create external benefits for fly fishers, who participate in the game in later rounds. The game can illustrate the role of markets in allocating resource use rights, and the effects of external benefits, free riding, and price ceilings.     

Valuing the benefits and costs of improved food safety and nutrition

Assuring the quality of food products, especially their safety and nutrition levels, is an increasing focus for governments, companies, and international trade bodies. In choosing quality assurance programs, public and private decision-makers must assess the benefits and costs of expected improvements in food safety and nutrition. This article discusses methods for measuring these benefits and costs as well as how these valuations are related to the mix of voluntary and mandatory quality management systems used in particular countries or trading blocs. These relationships are illustrated by a short case study of safety assurance systems for meat and poultry products.     

Forest owners’ willingness to accept compensation for voluntary conservation: A contingent valuation approach

To avoid conflicts often associated with mandatory regulations, it is crucial to motivate and incentivize forest owners to participate in voluntary conservation programs. To investigate forest owner preferences and willingness to accept compensation (WTA) to participate, we conduct a contingent valuation survey of non-industrial private forest owners in Norway. We find that WTA is negatively related to the size of the forest holding and absentee ownership, and positively related to the share of the forest classified as productive. The overall mean WTA per year per hectare is estimated at NOK 1800. Costs of reaching conservation goals can be saved by targeting small and relatively less productive forests and absentee owners first, before considering increasingly expensive forest areas. However, this recommendation only holds if desirable biological characteristics are not substantially less likely to be found in such areas. Results are potentially important both for our understanding of forest owner preferences and the costs of voluntary forest conservation schemes currently in use in many countries.     

Variations on a Theme: The Double-Oral Auction Market and Voluntary Contribution Mechanism Experiments

The double-oral auction and voluntary contribution mechanism experiments are the two most commonly used classroom experiments. In addition to running these experiments to illustrate market equilibrium and free riding, variations can be introduced to demonstrate more complex points. Several extensions to these experiments have been reported in the literature. In addition to compiling existing extensions, new extensions are presented and discussed with results from classroom trials at Reed College.     

Generic Product Advertising, Spillovers, and Market Concentration

We examine the decision to advertise a homogenous good. We show that the likelihood of inefficiently low advertising rests heavily on how one models the mechanism by which advertising affects demand. Regardless of this mechanism, however, there is always a lower bound of concentration below which no advertising occurs even when welfare-enhancing. In such cases, mandatory programs will raise welfare if they induce entry, although producer surplus may decline. Our model also provides an explanation for the stylized fact that advertising intensity first rises and then falls as concentration increases.     

Sustaining growth in agriculture: a quantitative review of agricultural research investments

Growth in agriculture depends on many things but one of the most important is investment in agricultural research. Decision making in the agricultural research policy area can only be aided by access to better information. This article overviews a recent endeavor to move policy dialogue beyond merely qualitative impressions towards a process that is underpinned with new and cogent data. The data used have been assembled at ISNAR in a manner designed to make comparisons both over time and between countries more valid than has been the case in the past. The comparisons thus possible reveal considerable diversity both between countries and between broad regional aggregations. Also illuminated here are issues related to the commodity orientation, capital and labor intensity, and size and scope of particular national programs.     

The zip (postal) code difference: methods to improve identification of rural subgroups

Over the past decade national policymakers have grappled with the increasingly difficult issue of implementing programs which sustain the viability of the rural health care system. The set of problems that are of major concern to these decisionmakers include: (1) the shifts in the utilization patterns away from the rural health care delivery system; (2) the impact of modification in the health care reimbursement system which disproportionately favors urban health systems; and, (3) the continuing difficulty in affecting the disproportionate supply of health providers in urban areas compared to rural settings. The complex nature of health services research demands a multidisciplinary approach especially on sociocultural problems such as rural health delivery. Effective analysis in health care crosses many disciplinary boundaries such as medicine, nutrition, economics, sociology, and public health among others disciplines. A major concern to many of these rural health research analysts is the ad hoc treatment of the rural populace in federal and state health policy decisionmaking. The key to understanding the variance in treatment of rural health can be appreciated by reviewing the accuracy of rural definitions. In the present study, a refined rural definition is proposed which will assist research analysts in providing greater information on the distribution of rural health care services. A preliminary analysis of the proposed definitions indicates that a more precise measurement of rural provides greater accuracy in determining the medical needs of rural areas. Adaptation of the concept will benefit the decisionmaking process through improvements in the methodological approach to rural health research. State legislators, regional and state planning agencies, federal funding agencies, foundations, and other programs involved in support of rural life program will be better able to assess the impact of programs through use of the new definition. Finally, a refined typology for rural will also effect other research endeavors and appears to be generalizable to research on other pertinent rural delivery issues such as transportation, education, and regional planning.     

Lessons about Effluent Trading from a Single Trade

Despite many years of existence, programs that allow transferable discharge permits to control water pollution have had quite limited success. This paper discusses a single trade that recently took place in the Lake Dillon drainage basin between point and nonpoint pollution sources. This trade demonstrates many of the challenges that are faced in effluent trading but also highlights the potential efficiency gains that can be achieved through such programs.     

Voluntary Funding for Generic Advertising Using a Provision Point Mechanism: An Experimental Analysis of Option Assurance

The mandatory nature of check-off programs remains a contentious policy issue. A provision point mechanism with a money-back guarantee offers an attractive, alternative voluntary funding approach, yet faces the problem of how to maintain future administrative capacity should contributions fall short of the funding threshold in the present period. To address this concern, a novel two-threshold, provision point mechanism is tested that sets a high threshold to fund marketing and a low threshold, if necessary, to secure administrative capacity for future advertising. Experimental results demonstrate that providing such "option assurance" sustains high overall contributions and, in some settings, can increase producer surplus.     

浅议清洁发展机制(CDM)与云南林业经济发展

以清洁发展机制的游戏规则和云南林业现状为研究背景,分析了云南林业在申请碳汇项目方面可以获得的利益以及在申请该项目方面所具有的优势,并进一步探讨了目前云南申请该项目面临的问题,最后针对相应的问题提出建立省级碳汇交易协调小组、理清游戏规则,注意谈判动向、作好基础研究等建议。     

What is the value of built heritage conservation? Assessing spillover effects of conserving historic sites in Singapore

Quantifying the economic benefits of built heritage facilitates the formulation and assessment of conservation policies and programs. There is however a lack of empirical research about the economic value of built heritage in Asian cities. This lack is problematic, given the rapid pace of demolition and redevelopment of historic landscapes in Asian cities. This study seeks to reduce the current gap in built heritage research by examining whether real estate premiums are generated by the designation of buildings as ‘conserved’ in Singapore, a city-state in South East Asia. Using 20 years of housing transaction data, and controlling for building, neighborhood and year fixed effects, we found that conservation designation had a positive impact on average sale prices per square meter of built area that was largest at residential locations between 800 m to 1.6 km from the conserved site. Findings also suggest that lower-cost public housing resale units gained a substantially smaller premium compared to private housing units. While our findings suggest an economic justification for building conservation programs in Asian cities, they also raise questions about such programs potential impact on neighborhood gentrification, and the need for appropriate taxation policies to ensure horizontal equity between property owners.     

中欧四国强制性企业社会责任制度比较研究

对中国、法国、英国、丹麦强制性企业社会责任(CSR)信息披露制度的发展历程进行系统性整理,基于应规披露内容、应规企业覆盖范围两个方面对中、法、英、丹进行比较分析,总结我国强制性CSR信息披露制度当前发展的不足,并针对这些不足进行对策研究,结合我国情况提出了完善强制性CSR信息披露制度的建议。     

Evaluating how we evaluate success: Monitoring,evaluation and adaptive management in Payments for Watershed Services programs

Payments for Watershed Services (PWS) programs have become an increasingly popular policy mechanism both in the U.S. and abroad. These programs are used to meet a variety of objectives, including improving the quality and quantity of water supplies, protecting endangered species, and advancing rural livelihoods. Monitoring, evaluation and adaptive management are important for filling fundamental knowledge gaps and improving the efficacy of PWS on the ground. However, relatively little work has evaluated how programs themselves monitor and evaluate their impacts and whether adaptive management is utilized. Here, we seek to improve understanding of the factors that contribute to the adoption of monitoring, evaluation and adaptive management practices through a literature review and a survey of PWS programs. Based on qualitative and logistic regression analyses, financial, technical and institutional capacity and leveraging broad stakeholder coalitions emerged as important factors contributing to systematic PWS monitoring, evaluation and adaptive management. This research underscores the importance of investing additional resources to support such capacity and coalition- building in PWS to ensure programs can meet their desired objectives.     

Agricultural research priority setting under multiple objectives: an example from Zimbabwe

Strategic priorities are assessed tor the agricultural research system in Zimbabwe in a situation characterized by multiple objectives, farm types, and agro-ecological zones. Economic surplus analysis is used to rank research programs by commodity and research program areas in total and disaggregated by large and small larms in high and low potential regions. No funding, current funding, and 50% more funding are allowed tor each program in the analysis. An optimal research portfolio is developed, first with all weight placed on efficiency, and second with increasing weights placed on benefits going to small-holder farmers. Even with no additional weight placed on small holders. lesearch programs for both small farms and low potential areas enter into the optimal research portfolio. As more emphasis is given to small holders, the reduction in overall efficiency gained due to research is relatively modest, Maize and cotton were the highest ranked commodity research programs of the 36 commodities considered for both large and small larms. Agronomy and soils research are relatively more important for small holders, while plant breeding and crop protection are relatively more important for large-scale farmers. priority selling: Economic surplus and mathematical programming analysis.     

Dial “A” for agriculture: a review of information and communication technologies for agricultural extension in developing countries

Agriculture can serve as an important engine for economic growth in developing countries, yet yields in these countries have lagged far behind those in developed countries for decades. One potential mechanism for increasing yields is the use of improved agricultural technologies, such as fertilizers, seeds, and cropping techniques. Public sector programs have attempted to overcome information‐related barriers to technological adoption by providing agricultural extension services. While such programs have been widely criticized for their limited scale, sustainability, and impact, the rapid spread of mobile phone coverage in developing countries provides a unique opportunity to facilitate technological adoption via information and communication technology (ICT)‐based extension programs. This article outlines the potential mechanisms through which ICT could facilitate agricultural adoption and the provision of extension services in developing countries. It then reviews existing programs using ICT for agriculture, categorized by the mechanism (voice, text, internet, and mobile money transfers) and the type of services provided. Finally, we identify potential constraints to such programs in terms of design and implementation, and conclude with some recommendations for implementing field‐based research on the impact of these programs on farmers’ knowledge, technological adoption, and welfare.     

On the Relationship between the Student–Advisor Match and Early Career Research Productivity for Agricultural and Resource Economics Ph.D.s

We use a unique data set on students receiving their Ph.D.s from top-ranked agricultural and resource economics programs to investigate how the ranking of a student's dissertation advisor affects his or her early career research productivity. After controlling for program reputation, we find that the higher the relative research productivity of a student's dissertation advisor the greater the student's early career research productivity. Allowing the estimated effects of advisor rank to vary with program reputation suggests that students from lower-ranked programs working with relatively more prominent advisors outperform their peers at highly ranked programs working with less prominent advisors.     

Consumers’ Preferences for Bread: Transgenic,Cisgenic, Organic or Pesticide‐free?

Consumers are apprehensive about transgenic technologies, so cisgenics, which limit gene transfers to sexually compatible organisms, have been suggested to address consumer concerns. We study consumer preferences for rye bread alternatives based on transgenic or cisgenic rye, grown conventionally or without the use of pesticides, relative to traditionally bred rye, grown with conventional or organic farming methods. Stated preference (SP) data from a choice experiment are combined with revealed preference (RP) data from market purchases from the same respondents. Results show that respondents prefer pesticide‐free production methods, and that while cisgenics is preferred over transgenics, the majority of respondents favour traditional breeding methods. The distribution in preferences suggests that some respondents prefer bread from cisgenic crops produced without pesticides over traditional crops produced using pesticides. Preferences for organic bread are stronger than for pesticide‐free products. From a policy perspective results suggest that excluding cisgenics from mandatory labeling in the EU, or including it in the voluntary non‐GM labelling in the US, would cause welfare losses for consumers.