who loses when prices are negotiated an analysis of the new car market we establish that there are large and persistent differences in final transaction prices for identical new cars and that demographic characteristics explain at least 20 of the observed variation older consumers perform progressively worse in negotiations and the age premium is greater for women than for men our results suggest that the complex nature of vehicle transactions leads to price dispersion in this market and that the worst performing groups older women have the lowest rates of market participation we conjecture that the results are driven by the sharp increases in women s education and labor force participation in recent decades

the effect of attending the flagship state university on earnings a discontinuity based approach abstract this paper examines the effect of attending the flagship state university on the earnings of 28 to 33 year olds by combining confidential admissions records from a large state university with earnings data collected through the state s unemployment insurance program to distinguish the effect of attending the flagship state university from the effects of confounding factors correlated with the university s admission decision or the applicant s enrollment decision i exploit a large discontinuity in the probability of enrollment at the admission cutoff the results indicate that attending the most selective state university causes earnings to be approximately 20 higher for white men

the role of education on the adoption of chemical fertiliser under different socioeconomic environments in ethiopia studies on input adoption consider education as one of the most important factors that affect adoption decisions however very little is known about the spill over effect of intra household education on the adoption process and about the impact of education on adoption decisions under different socioeconomic conditions we investigate these two issues using a discrete choice model the results indicate that the decision making process is a decentralised one in which educated adult members of the household actively participate in the decision making process this casts doubt on the traditional assumption that the household head is the sole decision maker the results reveal that there is a substantial and statistically significant intra household spill over effect of education on the adoption decision of households the results of the study also show that the coefficient of the education and the environment interaction variable is negative and statistically significant this demonstrates that education and socioeconomic environments could be substitutes in modern environments and complementary in traditional ones this implies that the expansion of education in traditional areas may be more attractive than in modern areas since education is usually the only means to enhance the ability of farmers to acquire synthesise and respond to innovations such as chemical fertiliser

learning by doing and learning from others human capital and technical change in agriculture household level panel data from a nationally representative sample of rural indian households describing the adoption and profitability of high yielding seed varieties hyvs associated with the green revolution are used to test the implications of a model incorporating learning by doing and learning spillovers the estimates indicate that i imperfect knowledge about the management of the new seeds was a significant barrier to adoption ii this barrier diminished as farmer experience with the new technologies increased iii own experience and neighbors experience with hyvs significantly increased hyv profitability and iv farmers do not fully incorporate the village returns to learning in making adoption decisions

profitability of incremental generic promotion of australian dairy products the motivation for this study rests on two factors first australian dairy farmers spend around 20 million annually on generic promotion and estimates of the returns from this expenditure are required to facilitate efficient investment decisions second while the australian dairy industry has been highly regulated there has been a substantial reduction in assistance over the past decade and farm gate milk prices were deregulated on 1 july 2000 the profit potential of promotion may vary with the degree of regulation so past estimates of the returns from promotion may not hold in the competitive environment of the future hence the aim of this study is to examine the effects of government intervention on the profitability for dairy farmers of incremental changes in generic dairy promotion expenditure using a perfectly competitive market as a reference point competitive market price and quantity outcomes for the australian dairy industry are estimated the impacts of increments in dairy product and competing product generic promotion expenditures on dairy farmers profits are assessed using equilibrium displacement modelling finally graphical procedures are used to examine the effects of dairy industry regulation on the profitability of dairy promotion

impacts of food crop improvement research evidence from sub saharan africa abstract the paper reviews and summarizes evidences of impacts of crop improvement research of major food crops in africa it provides evidence of increased availability of improved varieties of major food crops to farmers in africa increased food production in regions where adoption has occurred and positive returns to research investment indicating that agricultural research in africa has had productivity increasing impacts on its agriculture however research impacts vary considerably across countries and regions within a country as a result of agroclimatic factors and policy environment which affects the supply of seeds and other inputs and the continuity and stability of research investments the paper points to a number of important issues both internal and external to the agricultural research system organization that need to be addressed if agricultural research is to provide a stimulus for modernizing african agriculture given the small size of food crop production area in many african countries it is important for research systems to take full advantage of research spill ins from regional and international research organizations there is a great potential to increase the efficiency of research systems by improving the coordination among members of national research systems and continuing improvements in collaborations between narss and regional and international organizations

the political economy of public research investment and commodity policies in agriculture an empirical study the paper tests a political economy theory of simultaneous government decision making on income redistribution through commodity policies and on public research investment in agriculture we use data from 37 countries on agricultural protection and public agricultural research expenditures pari the empirical results are consistent with the political economy hypotheses the analysis suggest that structural changes in the economy have important effects on the political incentives for governments not only to subsidize or tax farmers but also to invest in public agricultural research furthermore the analysis supports the hypotheses that the impact of such structural changes on government decision making on pari is non linear and conditional on other factors regarding the impact of political institutions the results suggest that more democracy neither leads to more distortionary transfers agricultural protection nor to lower investment in public goods pari

principal challenges confronting smallholder agriculture in sub saharan africa summary this paper uses small scale farm survey data from five countries of eastern and southern africa to highlight four under appreciated issues i how land distribution patterns constrain the potential of crop technology and input intensification to enable many small farms to escape from poverty ii why most smallholders are unable to produce more than a marginal surplus or participate meaningfully in commodity markets iii why most farmers are directly hurt by higher grain prices and iv why the marketed agricultural surplus is exceedingly concentrated among a small group of relatively large smallholders policy and public investment options are reviewed in the light of these findings there is no one future for small farms in africa much depends on government policy and investment decisions

oaxaca blinder as a reweighting estimator the classic regression based estimator of counterfactual means studied by ronald oaxaca 1973 and alan blinder 1973 is shown to constitute a propensity score reweighting estimator based upon a linear model for the conditional odds of being treated

crafting smallholder driven agricultural research systems in southern africa abstract the national agricultural research systems narss in sub saharan africa have made enormous progress over the past four decades in replacing european with african scientists increasing the number of scientists and shifting priorities from export to food crops nevertheless most narss are having difficulty in producing a steady stream of new technologies for small scale farms and in generating adequate financial support from their government zimbabwe and malawi are among the first countries in africa to mount indigenousled reforms of their narss this paper documents the steps taken by the agricultural research council of zimbabwe to generate a consensus among scientists farmers and policy makers to reform the national agricultural research system by increasing the voice of smallholders and other stakeholders in setting research priorities making scientists more accountable to smallholders and generating new sources of financial support from user fees and taxes on commodities malawi is pursuing a commodity approach to revitalizing its narss the experience of both zimbabwe and malawi has shown that there is no blueprint for reforming narss in africa donors can assist the reform process by supporting local initiatives to craft smallholder driven research systems that are staffed with accountable scientists who are adequately financed from local sources

a unified welfare analysis of government policies we conduct a comparative welfare analysis of 133 historical policy changes over the past half century in the united states focusing on policies in social insurance education and job training taxes and cash transfers and in kind transfers for each policy we use existing causal estimates to calculate both the benefit that each policy provides its recipients measured as their willingness to pay and the policy s net cost inclusive of long term impacts on the government s budget we divide the willingness to pay by the net cost to the government to form each policy s marginal value of public funds or its mvpf comparing mvpfs across policies provides a unified method of assessing their impact on social welfare our results suggest that direct investments in low income children s health and education have historically had the highest mvpfs on average exceeding 5 many such policies have paid for themselves as governments recouped the cost of their initial expenditures through additional taxes collected and reduced transfers we find large mvpfs for education and health policies amongst children of all ages rather than observing diminishing marginal returns throughout childhood we find smaller mvpfs for policies targeting adults generally between 0 5 and 2 expenditures on adults have exceeded this mvpf range in particular if they induced large spillovers on children we relate our estimates to existing theories of optimal government policy and we discuss how the mvpf provides lessons for the design of future research

a policy preference function for government intervention in the u s wheat market this paper estimates a policy preference function that explains the government s choices of target prices government held wheat stocks and public wheat research funding the policy preference function depends on producers surplus consumers surplus and budget expenditures an important innovation in this paper is the inclusion of interactions between public research expenditures and other public policy variables results indicate that the government places a premium of 25 to 45 on the welfare of wheat producers of relative to budget expenditures while wheat consumers welfare is discounted as much as 50 relative to budget expenditures the purpose of this paper is to provide an explanation of government commodity programs stock accumulations and research expenditures in the u s wheat sector the explanation is based on a policy preference function ppf that depends on producers surplus consumers surplus and budget expenditures it is assumed that target prices reductions in or additions to government stocks and public research expenditures are chosen to maximize the policy preference function the central contribution of the paper is the estimation of a function that is consistent with the observed government interventions in the u s wheat market that is the paper explains the observed target prices government sales and public research expenditures as rational behavior by a government which seeks to maximize the estimated policy preference function the approach in this paper is based on the political interest group theories of peltzman and becker applications of these ideas to agriculture include rausser and freebairn s description of the beef industry gardner s 1985 analysis

the convention on biological diversity and agriculture implications and unresolved debates1 summary the convention on biological diversity addresses two controversies that surround plant genetic resources pgrs one debate has been over property rights governing pgrs and the distribution of benefits from their use the second has been over the adequacy of measures to maintain crop genetic diversity this paper examines how these two debates are linked and reviews previous multilateral attempts to address them the convention signals wider international acceptance of stricter property rights over pgrs and the need for multilateral assistance for pgr conservation however current proposals to implement the convention appear too limited in scope to achieve their stated conservation objectives while several areas of controversy remain these include debates over i intellectual property protection for biological inventions ii control over pgrs in international gene banks iii the international biosafety protocol regulating biotechnology iv mechanisms to finance pgr conservation and v the allocation of funds between in situ and ex situ conservation q 1998 elsevier science ltd all rights reserved

returns to public investments in agriculture with imperfect downstream competition a multiple market framework is developed to measure the size and distribution of research benefits the model considers an upstream raw product market and a downstream finished product market and allows for imperfect competition in the intermediary food processing sector a central conceptual result is derived an increase in raw product output is a sufficient condition for costreducing innovations in the farm sector to increase social welfare a special case of linear farm supply and isoelastic processing production functions reveals that necessary conditions for welfare to decrease are a convergent farm supply shift an oligopsonistic upstream market configuration and increasing returns to scale processing technology a basic goal of public agricultural research is to reduce the costs of farm production toward this end governments have invested considerable resources to improve basic scientific knowledge develop novel technologies and facilitate the adoption of modern plant varieties and farming methods economists have generally concluded that public investments in agriculture have achieved remarkable success in lowering the marginal cost of farm production due in large part to the effectiveness of land grant research and extension activities chavas and cox cochrane as a result of these cost changes public agricultural investments have been shown to yield impressive social rates of return in numerous studies for a survey of this literature see alston norton and pardey several recent papers have shown that imperfect competition in the downstream processing sector can affect both the size and the distribution of welfare changes dryburgh and doyle consider the impact of technical innovation in a multimarket study of the british dairy industry under alternate downstream in

demand for improved fish feed in the presence of a subsidy a double hurdle application in kenya fish farming households demand for improved fish feed from the private market in kenya is potentially influenced by the government s feed subsidy program this article applies the double hurdle model to a cross section of fish farms to analyze demand for improved fish feed from private markets and whether the government feed subsidy program has an effect on private demand for improved feed the results indicate that households decisions to participate in the improved feed market are affected by the quantity of improved feed received from the government once the participation decision has been made we find evidence of crowding in of the private improved feed sector that is the government s allocations of subsidized feed appear to increase private sector demand in addition the price of improved feed negatively affects the quantity purchased as expected education extension contacts and ease of marketing matured fish increase household propensity to purchase improved feed commercially policies that help reduce the price of improved feed such as reduction in tariffs on imported feeds and feed ingredients will foster demand for the feed as will policies that facilitate marketing of fish at reasonable prices by households

contribution of fisheries and aquaculture to food security and poverty reduction assessing the current evidence following a precise evaluation protocol that was applied to a pool of 202 articles published between 2003 and 2014 this paper evaluates the existing evidence of how and to what extent capture fisheries and aquaculture contribute to improving nutrition food security and economic growth in developing and emergent countries in doing so we evaluate the quality and scientific rigor of that evidence identify the key conclusions that emerge from the literature and assess whether these conclusions are consistent across the sources the results of the assessment show that while some specific topics are consistently and rigorously documented thus substantiating some of the claims found in the literature other areas of research still lack the level of disaggregated data or an appropriate methodology to reach consistency and robust conclusions more specifically the analysis reveals that while fish contributes undeniably to nutrition and food security the links between fisheries aquaculture and poverty alleviation are complex and still unclear in particular national and household level studies on fisheries contributions to poverty alleviation lack good conceptual models and produce inconsistent results for aquaculture national and household studies tend to focus on export value chains and use diverse approaches they suggest some degree of poverty alleviation and possibly other positive outcomes for adopters but these outcomes also depend on the small scale farming contexts and on whether adoption was emergent or due to development assistance interventions impacts of fish trade on food security and poverty alleviation are ambiguous and confounded by a focus on international trade and a lack of consistent methods the influences of major drivers decentralization climate change demographic transition are still insufficiently documented and therefore poorly understood finally the evaluation reveals that evidence based research and policy narratives are often disconnected with some of the strongest and long lasting policy narratives lacking any strong and rigorous evidence based validation building on these different results this paper identifies six key gaps facing policy makers development practitioners and researchers

an economic evaluation of spread on rwanda s rural population abstractsustainable partnerships to enhance rural enterprises and agricultural development spread was a programme to enhance the value chain for commodities in rwanda including coffee the implicit concept was that improving the value chain would increase the incomes for smallholders and hence reduce the poverty rate the results indicate that rwanda coffee prices increased relative to an index price for traded coffee with the implementation of spread in addition the results indicate that participation in the coffee market at this time was associated with higher household income and lower rates of poverty

estimating overall returns to international agricultural research in africa through benefit cost analysis a best evidence approach this study offers a best evidence approach to summarizing recent benefit cost analyses of international agricultural research in africa first from an extensive literature review and the resulting global inventory of impact studies 23 studies are identified that calculate aggregate rates of return for consultative group on international agricultural research cgiar and partner investments in sub saharan africa ssa these studies are then appraised against a review framework consisting of principles criteria and indicators for study rigor subsequently the economic benefits reported by studies grouped on the basis of its analytical rigor are aggregated and set against total investment by the cgiar and national agricultural research systems to determine if the total investment to date can be justified by documented benefits under a range of assumptions as a result the study finds that aggregate investment is justified under a fairly wide range of suppositions under all scenarios the vast majority of documented benefits stem from a relatively limited array of activities with a majority of benefits stemming from biological control 80 close to 20 of total benefits result from crop genetic improvement and less than 1 result from all other activities the implications of these results for research investment strategies in ssa and impact assessment are discussed

risk uncertainty and learning in adoption of a crop innovation risk and uncertainty have often been suggested as causes of poor adoption of rural innovations but empirical evidence has been scarce this study focuses on a new crop type chickpeas in western australia to gather such evidence the empirical models developed are based on a theoretical framework that conceptualizes adoption as a dynamic decision process involving information acquisition and learning by doing by growers who vary in their managerial abilities risk preferences and their perceptions of the profitability and riskiness of the innovation learning encompasses improvements in skill as well as reductions in uncertainty an annual face to face survey of over 100 farmers was conducted over 3 years eliciting the farmers risk attitudes and their subjective distributions of yields and prices two limited dependent variable models tobit and probit are used to estimate the empirical model there is a high degree of goodness of fit for both models the study provides strong empirical support for the primarily economic character of the adoption decision and highlight the importance of economic risk in the process the two risk related factors with greatest impact on the adoption decision were risk aversion and relative riskiness of the innovation risk aversion tended to reduce adoption and to do so to a greater extent as relative riskiness and scale increased results also reveal the key role that trialing of the innovation plays in adoption

measuring returns to an innovation in an imperfectly competitive market application to mechanical harvesting of processing tomatoes in taiwan in this paper we develop and apply a general imperfect competition model to evaluate returns to a cost reducing innovation most related work has applied models of perfect competition results demonstrate that welfare estimates derived from a model of perfect competition may be seriously distorted when the relevant market is imperfectly competitive application to mechanical harvesting of processing tomatoes in taiwan reveals the potential for significant benefits to adoption of mechanical harvesting in taiwan however farmers incentives to adopt the harvester are attenuated because total benefits are reduced by oligopsony power in tomato procurement and imperfectly competitive processors will capture a large share of the benefits that remain in this paper we analyze the welfare impacts of mechanical harvesting of processing tomatoes in taiwan a key distinguishing feature of the study relative to previous empirical work on returns to innovations is that it permits market power to be exhibited in both the markets for the raw agricultural product and the processed product outputs indeed the empirical results find significant processor market power in taiwan in both the procurement of raw tomatoes and the sale of processed products in the domestic market the study demonstrates that welfare estimates derived from a model of perfect competition may be seriously distorted when in fact the relevant markets are imper

the role of application assistance and information in college decisions results from the h r block fafsa experiment growing concerns about low awareness and take up rates for government support programs like college financial aid have spurred calls to simplify the application process and enhance visibility we present results from a randomized field experiment in which low income individuals receiving tax preparation help were also offered immediate assistance and a streamlined process to complete the free application for federal student aid fafsa for themselves or their children treated participants were also provided with aid estimates that were compared against tuition cost amounts for nearby colleges the combined assistance and information treatment substantially increased fafsa submissions and ultimately the likelihood of college attendance persistence and aid receipt in particular high school seniors whose parents received the treatment were 8 percentage points more likely to have completed two years of college going from 28 to 36 during the first three years following the experiment families who received aid information but no assistance with the fafsa did not experience improved outcomes the findings suggest many other opportunities for using personal assistance to increase participation in programs that require filling out forms to become eligible jel codes i2 h4 j24 copyright 2012 oxford university press

the gains from agricultural research under distorted trade abstract this paper explores the gains from research issue within the framework of a product which is traded with the aid of export subsidies because of the taxpayer burden associated with increased exports it is quite possible for the returns to research to be negative a decline in the rate of protection through a rising world market leads to a linear increase in the gains from research while a rise in the internal support price will cause a non linear and negative response if the supply shift is pivotal and a linear and negative response if it is parallel finally global returns to research will be higher than individual country returns and will always be positive in a free trade environment

input subsidy programs in sub saharan africa a synthesis of recent evidence input subsidy programs have once again become a major plank of agricultural development strategies in africa ten african governments spend roughly us 1 billion annually on input subsidy programs isps amounting to 28 6 of their public expenditures on agriculture this article reviews the microlevel evidence on isps undertaken since the mid 2000s we examine the characteristics of subsidy beneficiaries crop response rates to fertilizer application and their influence on the performance of subsidy programs the impacts of subsidy programs on national fertilizer use and the development of commercial input distribution systems and finally the impact of isps on food price levels and poverty rates the weight of the evidence indicates that the costs of the programs generally outweigh their benefits findings from other developing areas with a higher proportion of crop area under irrigation and with lower fertilizer prices factors that should provide higher returns to fertilizer subsidies than in africa indicate that at least a partial reallocation of expenditures from fertilizer subsidies to r d and infrastructure would provide higher returns to agricultural growth and poverty reduction however because isps enable governments to demonstrate tangible support to constituents they are likely to remain on the african landscape for the foreseeable future hence the study identifies ways in which benefits can be enhanced through changes in implementation modalities and complementary investments within a holistic agricultural intensification strategy among the most important of these are efforts to reduce the crowding out of commercial fertilizer distribution systems and programs to improve soil fertility to enable farmers to use fertilizer more efficiently the challenges associated with achieving these gains are likely to be formidable

natural resource management and household well being the case of posaf ii in nicaragua summary measuring the impact of natural resource programs is a key element in the formulation and implementation of policies designed to promote farm income while enhancing the quality of the surrounding environment in this paper we analyze the economic impact of natural resource technologies delivered by the socio environmental and forestry development program ii posaf ii in nicaragua we use cross sectional data for 1 483 households from 212 treated and control communities results obtained from propensity score matching psm ordinary least squares ols weighted least squares regression wls based on psm and instrumental variables iv regression indicate that posaf ii has had a positive impact on the total value of agricultural production of beneficiary farmers an internal rate of return analysis supports the hypothesis that increasing household income while encouraging the sustainable use of natural resources through the implementation of suitable management programs can be complementary development objectives

returns to policy oriented agricultural research the case of barley fertilization in syria summary in 1984 icarda and its syrian partners initiated farming systems research that led to a change in national fertilizer allocation policy evidence is assessed on the policy influence of the fertilizer response research and on the impact of switching to a more inclusive policy that relaxed the government s probation of fertilizer allocation to barley interviews with key informants make a persuasive case for attribution estimates from economic surplus models are consistent with a high rate of return on investment in the policy oriented research this case study provides a contribution to the limited empirical literature on returns to research under policy distortions

the determination of technology and commodity policy in the us dairy industry united states dairy policy includes both predatory and productive components the milk price support program is designed to transfer income to dairy farmers while research and extension expenditures are designed to increase social welfare the purpose of this chapter is to provide an empirical example of the theory developed in chapter 4

the influence of management characteristics on the technical efficiency of wheat farmers in eastern england technical efficiency of wheat farms in eastern england is measured through the estimation of a stochastic frontier production function using panel data for the 1993 1997 crop years variations in the technical efficiency index across production units are explained through a number of managerial and farm characteristic variables following battese and coelli 1995 empirical econ 20 325 332 and incorporating the spirit of rougoor et al 1998 agric econ 18 261 272 the technical efficiency index across production units ranges from 62 to 98 the objectives of maximising annual profits and maintaining the environment are positively correlated with and have the largest influence on technical efficiency moreover those farmers who seek information have more years of managerial experience and have a large farm are also associated with higher levels of technical efficiency future studies that seek to explain variation in technical efficiency should include further aspects of the managerial decision making process

modeling farmers decisions on tea varieties in vietnam a multinomial logit analysis this article analyzes households choice on tea varieties in vietnam by using a multinomial logit model the modeling takes into account the issue of unobserved individual heterogeneity and the endogeneity of some explanatory variables use of chemical and organic fertilizers the results show that important factors influencing the decision to adopt one type of tea varieties include income age household size farming contract and use of organic fertilizers but also membership of professional associations such as the tea association and the farmers union

economic returns to cowpea research extension and input distribution in senegal abstract this paper calculates the rate of return to a set of cowpea research extension and distribution projects in senegal to be between 31 and 92 the results show that a modestly funded program on a secondary crop can be successful they also indicate that programs may increase their effectiveness by addressing specific household needs in this case by focusing on short cycle varieties that provide food during the hunger season prior to the traditional harvest

impacts of foreign policies on the gains from research and promotion abstract this paper compares the direct and indirect effects of rest of the world row policy on welfare in country a the direct effect due to the change in world price caused by the policy in the absence of research promotion induced shifts in supply demand and the additional or indirect effect of the policy on the welfare gain to country a from its investment in research and promotion the results showed that the reduction in aggregate economic benefits from research promotion due to a world price reducing policy in row could be in the range of 25 50 of the direct reduction in social welfare due to the row policy in the case of australian beef veal it is possible for the welfare impact of the row policy via research payoff in country a to exceed the direct welfare cost

climate change and agriculture the role of international trade predictions of future climate and atmospheric conditions are reviewed and the implications for agriculture in different areas of the world are identified the swopsim static world policy simulation model used to evaluate the worldwide economic effects of climate change is described an economic sensitivity analysis of concurrent yield losses in major grain producing regions considering the possibility of concurrent changes in production potential elsewhere in the world is reported agricultural impacts of climate change based on three general circulation models are evaluated

the rate of return to public sector agricultural r d in the uk 1965 80 1989 the rate of return to public sector agricultural r d in the uk 1965 80 applied economics vol 21 no 8 pp 1063 1086

technological change and risk management an application to the economics of corn production the paper investigates the linkages between technological change and production risk with an application to corn the effects of technology on risk exposure are analyzed we define technological progress to be risk increasing risk decreasing if it increases decreases the relative risk premium the analysis is applied to panel data from wisconsin research stations conditional moments including mean variance and skewness of corn yield grain moisture and corn profit are estimated for different sites we investigate how the trade off between expected return and the risk premium varies over time and over space the empirical results indicate that technological progress contributes to reducing the exposure to risk as well as downside risk in corn production although this effect varies across sites they also stress the role of the relative maturity of corn hybrids as a means of managing risk

recent and prospective adoption of genetically modified cotton a global computable general equilibrium analysis of economic impacts abstract this article provides estimates of the economic impact of initial adoption of genetically modified gm cotton and of its potential impacts beyond the few countries where it is currently common use is made of the latest version of the gtap database and model our results suggest that if other developing countries especially in sub saharan africa were to follow the lead of china south africa and most recently india adoption of gm cotton varieties could provide even larger proportionate gains to farmer and national welfare than in those early adopting countries furthermore those estimated gains are shown to exceed and reinforce those from a successful campaign under the wto s doha development agenda to reduce remove cotton subsidies and import tariffs globally

the calculation of returns to research in distorted markets reply abstract most of the emperical literature calculating rates of return to publicly sponsored research assumes that research is the only relevant government intervention for most countries this assumption is untenable this paper shows that improperly measuring government inducedmarket distortions can severely bias research rate of return calculations if the interaction between successful research and other government interventions increases the cost of the other interventions then neglecting market distortions unambigously increases the calculated rate of return three examples of government induced distortions show that the magnitude of the upward bias in calculated rates of return can be extremely large in some cases more than 100 percentage points a normative implication is that governments should account for interactions between research and price interventions when determining research support levels a positive implication is that existing government research funding patterns are more readily explainable as reasonable behavior by a government that accounts for these interactions

genetic improvements in major us crops the size and distribution of benefits the distribution of welfare gains of genetic improvements in major us crops is estimated using a world agricultural trade model multi market welfare estimates were 75 larger than estimates based on the price exogenous change in revenue method frequently used by plant breeders annual benefits of these genetic improvements range from us 400 600 million depending on the supply shift specification of this 44 60 accrues to the us 24 34 accrues to other developed countries developing and transitional economies capture 16 22 of the welfare gain the global benefits of a one time permanent increase in us yields are us 8 1 billion discounted at 10 and us 15 4 billion discounted at 5 gains to consumers in developing and transitional economies range from us 6 1 billion 10 discount rate to us 11 6 billion 5 discount rate

managing green revolution technology an analysis of a differential practice combination in swaziland the process of technology adoption in agriculture is not well understood numerous studies have attempted to explain the adoption process but their shortcomings have resulted in limited success almost all technological adoption studies have characterized adoption as a discrete phenomenon adopters versus nonadopters rather than a continuum that reflects the intensity of use of various technologies only a few studies have used continuous adoption variables 2 most studies view technological practices in isolation from one another that is interdependencies among these practices have largely been ignored 3 some authors have hypothesized a specific type of interdependency referred to as sequential adoption behavior 4 the sequential adoption process is one in which one modern input is adopted and then after a lag another input is adopted for example it is best to adopt modern varieties and fertilizer together because of the interactions among practices however it is argued that farmers may first adopt modern varieties and 2 3 years later adopt fertilizer h d leathers and m smale argue that the empirical evidence shows that for the most part farmers choose to adopt inputs sequentially adopting initially only part of the package and subsequently adding components over time d byerlee and e h de polanco found that the farmers in the mexican alliplano have adopted a package of biochem

labor market returns to two and four year college the paper examines labor market returns to a two and four year college education analysis of the 1972 national longitudinal survey of youth observation that the average person who attended a two year college earned about 10 percent more than those without any college education comparison with the wages of those who attended a four year college education

evaluating returns to agricultural research a review this paper reviews and compares the most common approaches used to evaluate public agricultural research investment ex post studies fall into two major groups a consumer and producer surplus analyses estimating average rates of return to research and b production function analyses estimating marginal rates of return to research ex ante studies fall into four groups a those using scoring models to rank research activities b those employing benefit cost analysis to establish rates of return to research c those using simulation models and d those using mathematical programming to select an optimal mix of research activities

the effects of supply shifts on producers surplus changes in the supply curve caused by technological improvements in production or changes in national policy may or may not benefit producers as a whole depending on the type of shift in the supply curve a structured analysis of different changes in the supply curve that model this situation is given and the change in producers surplus is examined depending on quantitative aspects of the supply and demand curves for supply and demand curves that are linear or power functions a small downward pivot of the supply curve will increase producers surplus only if the equilibrium point is far enough into the elastic region of the demand curve and any downward pivot of the supply curve will decrease producers surplus if the equilibrium point is in the inelastic region of the demand curve similar results are obtained for the more general case of convex supply and demand curves

modern varieties productivity and sustainability recent experience and emerging challenges abstract the contribution of modern varieties of cereal crops to increased productivity in the postgreen revolution period is reviewed and the future role of hybrids and biotechnology discussed particular emphasis is given to the ways in which modern varieties may contribute to input efficiency and sustainability finally economic and institutional issues in restructuring plant breeding programs for the most efficient use of resources in both the public and private sectors and at the national and international levels are analyzed

persistent underinvestment in public agricultural research abstract it is often argued that public support of agricultural research is inadequate however the empirical papers that support this hypothesis rarely reflect formal behavioral theory capable of explaining this phenomenon this paper presents a theory that explains underfunding namely that funding agencies respond too slowly to secular changes in the value of research a model of farmer and funding agency behavior is presented and shown to imply that actual research funding will be consistently smaller than optimal funding the assumptions and results of the model are explained in terms of the institutional literature on public agricultural research agencies

farmers perceptions and adoption of new agricultural technology evidence from analysis in burkina faso and guinea west africa economists investigating consumer demand have accumulated considerable evidence showing that consumers generally have subjective preferences for characteristics of products and that their demand for products is significantly affected by their perceptions of the product s attributes however the role of farmers preferences in adoption decisions have received very limited attention in adoption studies conducted by economists this paper tests the hypothesis that farmers perceptions of technology characteristics significantly affect their adoption decisions the analysis conducted with tobit models of modern sorghum and rice varietal technologies in burkina faso and guinea respectively strongly supports this hypothesis our results provide a strong case for future adoption studies to expand the range of variables used away from the broad socio economic demographic and institutional factors to include farmers subjective perceptions of the characteristics of new agricultural technologies

the effect of housing wealth on college choice evidence from the housing boom we use nlsy97 data to examine how home price variation affects the quality of postsecondary schools students attend we find a 10 000 increase in housing wealth increases the likelihood of public flagship university enrollment relative to nonflagship enrollment by 2 0 percent and decreases the relative probability of attending a community college by 1 6 percent these effects are driven by lower income families predominantly by altering student application decisions we also find home price changes affect direct quality measures of institutions students attend furthermore for lower income students each 10 000 increase in home prices leads to a 1 8 percent increase in the likelihood of completing college

measuring research benefits in an imperfect market second reply in a recent comment on voon 1994 holloway 1999 has made the following conclusions under conditions that are almost identical to ones considered by voon 1994 and by sexton and sexton 1996 pivotal shifts in marginal costs generate strictly greater benefits under monopoly this paper reconsiders the above conclusion a simple geometric approach similar to alston et al 1988 and voon and edwards 1991 is used for the reassessment the analysis shows that a pivotal shift in the marginal costs generates greater benefits under perfect competition than it does under monopoly this is opposite to holloway s finding the model is depicted in fig 1 instead of a parallel shift in the mc curve as in voon 1994 a pivotal shift above the origin is assumed this implies that the supply price elasticity is greater than unity e 1 see voon and edwards 1991 under monopoly

economics of biological control of cassava mealybug in africa abstract pest populations of the cassava mealybug phenacoccus manihoti mat ferr homoptera pseudococcidae were reduced successfully by the biological control agent apoanagyrus epidinocarsis lopezi de santis hymenoptera encyrtidae throughout most of sub saharan africa the economics of the project were evaluated based on data from field trials socio economic surveys published results and financial information provided by the international institute of tropical agriculture iita and the national programmes costs and benefits for the biological control of p manihoti were calculated over 40 years 1974 2013 for 27 african countries for four different scenarios taking into account that impact by a lopezi and speed of the impact differ between ecological zones a reasonable calculation considering compounded interest resulted in a benefit cost ratio of about 200 when cassava was costed at world market prices and of about 370 740 when inter african prices were considered

one discriminatory rent or double jeopardy multicomponent negotiation for new car purchases about half of new car transactions actually consist of two transactions one in which the customer buys a new car from a dealer and the other in which the customer sells his or her existing car to the dealer as a trade in at most dealerships both the price of the new car and the price of the trade in are negotiated in such negotiations as a general rule car dealers are willing to trade off profits made on the new car versus profits made on the trade in to an economist this suggests that the dealer may see the new car customer as the source of a certain amount of extractable profit one discriminatory rent that can be subdivided into two arbitrary buckets the new car margin and the trade in margin economic models of bargaining tend to use a similar paradigm modeling the amount of total economic surplus created by the transaction and supposing that each party will get a share of that surplus that is determined by the party s bargaining power it is usually recognized that there are multiple price mechanisms that could convey the same division of surplus to the two parties if this is indeed a good description of how new car negotiations unfold then an observer comparing a similar set of transactions should expect new car and trade in profit margins to be negatively correlated the better the deal the customer gets on a new car the less good the deal one should expect the customer to get on the trade in an alternative view of this multicomponent negotiation is that customers or dealers or competition and market structure

the world trade organisation s doha cotton initiative a tale of two issues four west african nations have demanded that the world trade organization s doha development agenda include a cotton initiative that involves two issues cutting cotton subsidies and tariffs and assisting farm productivity growth in africa the authors provide estimates of the potential economic impacts of 1 complete or partial removal of cotton subsidies and import tariffs globally and 2 cotton productivity growth through the adoption of genetically modified gm cotton varieties they use the latest version of the gtap database and model their results confirm that unlike for other agricultural subsidies and tariffs for cotton it is subsidy reductions rather than tariff cuts that would make by far the largest impact for sub saharan africa the potential gains are huge relative to the effects on that region of reforming other merchandise trade policies and they could be more than doubled if that reform provided the cash for farmers to take advantage of the biotechnology revolution and adopt gm cotton varieties but those potential gains and the affordability of switching to costly gm seed depend crucially on the extent to which high income countries are willing to lower domestic support to their cotton farmers

systems of innovation theory and the changing architecture of agricultural research in africa abstract this paper examines the on going evolution of the organisational architecture of agricultural research in africa once considered a rural backwater populated by agronomists extension agents and farmers agricultural research is now being explicitly placed within global debates about innovation technology institutions and development this is reflected in a growing interest in the use of systems of innovation theory to both understand and reform innovation processes within agriculture the basic argument put forward in the paper is that the conception of a global agricultural research system and associated efforts to create a coordinated multi layered supra national research infrastructure are at odds with both the realities of research at national level and the bio physical and socio economic heterogeneity that characterises rural africa it is suggested that a less directive approach to support for agricultural research is required to allow national characteristics and differences to come to the fore and to give more room for the development of the all important demand side

the gains from research into tradable commodities this paper develops a model for assessing the aggregate level and distribution of the benefits of reseach into tradable commodities it estimates gains to australia and to the rest of the world from research into the wool and wheat industries

the informational role of product trade ins for pricing durable goods this research theorizes that sellers of durable goods can utilize inferences about the buyer s willingness to pay based not only on her decision to trade in the old good but also on its characteristics we find empirical support for this theory using transaction data for new car purchases the results support the notion that dealers infer a higher willingness to pay and charge higher prices to consumers who trade in a used vehicle than to those who do not we also find that dealers charge even higher prices to those consumers who trade in used cars that are similar to the new one

the impact of agricultural research on productivity and poverty in sub saharan africa while it is widely recognized that agricultural research is a key driver of broad based technological change in agriculture that benefits the poor in many different ways little is known about its aggregate impacts on productivity growth and poverty reduction in sub saharan africa ssa using a polynomial distributed lag structure for agricultural research within a simultaneous system of equations framework this paper first demonstrates that agricultural research contributes significantly to productivity growth in ssa productivity growth is again shown to raise per capita incomes with income increases finally having significant poverty reducing effects with an aggregate rate of return of 55 the payoffs to agricultural research are also impressive agricultural research currently reduces the number of poor by 2 3 million or 0 8 annually while the actual impacts are not large enough to more than offset the poverty increasing effects of population growth and environmental degradation the potential impacts of agricultural research are far greater apart from low research investments ssa faces several constraints outside the research system that hinder realization of potential research benefits the results show that doubling research investments in ssa would reduce poverty by 9 annually however this would not be realized without more efficient extension credit and input supply systems

are consumers myopic evidence from new and used car purchases abstract we investigate whether car buyers are myopic about future fuel costs we estimate the effect of gasoline prices on short run equilibrium prices of cars of different fuel economies we then compare the implied changes in willingness to pay to the associated changes in expected future gasoline costs for cars of different fuel economies in order to calculate implicit discount rates using different assumptions about annual mileage survival rates and demand elasticities we calculate a range of implicit discount rates similar to the range of interest rates paid by car buyers who borrow we interpret this as showing little evidence of consumer myopia jel d12 h25 l11 l62 l71 l81

the calculation of returns to research in distorted markets comment abstract in a recent article oehmke reported that a high internal rate of return for investment in research when the interaction between research and price policy costs was disregarded could become very low or even negative when the effects of research on the costs of price policy were considered in this paper the social returns from research in the presence of the price policies considered by oehmke are reexamined using a simple geometric approach the analysis suggests that an output subsidy in a small importing economy an output subsidy in a closed economy and a target price in a large exporting economy will on oehmke s assumptions cause only small reductions in the internal rate of return from investment in research this implies that the apparent underinvestment by governments in agricultural research cannot be explained away by a large upward bias known to governments in measured rates of return due to failure to account for interactions between research and the costs of price policy measures

the distribution of benefits from technical change among classes of consumers and producers an ex anteanalysis of beans in brazil abstract because new agricultural technology in developing countries has sometimes bypassed small farmers who are an important social group in low income countries design of technology specifically appropriate to small farmers has been advocated as a policy goal this paper appraises the comparative returns to investment in small farm biased scale neutral and large farm biased technology for bean production in brazil a consumer surplus model is developed to estimate the distribution of benefits among producing sectors and classes of consumers while previous studies have relied on geometrical approximations to measure economic benefits as the area under the supply shifts here an exact analytic solution is obtained by integrating from the supply axis scale neutral technology leads to significant small farmer benefits while maximizing benefits to consumers large farm biased technology results in less benefits to small farmers and consumers and only minor gains to large farmers when compared to scale neutral technology small farm biased technology produces the greatest gains to small farmers but the lowest level of benefits to consumers

the impact of agricultural research in africa aggregate and case study evidence abstract this paper presents case study results and aggregate data to evaluate the impact of research in african agriculture of 32 case studies all but eight report annual returns over 20 and many are far higher with most gains arising in the late 1980s and 1990s spurred by policy reforms and changing incentives these innovations have led to sustained growth in aggregate cereal crop yields since 1985 africa s belated green revolution is based on new varieties often with early maturation for drought escape complemented by new management techniques typically labor intensive efforts to conserve soil moisture and build soil fertility

the impact of integrated aquaculture agriculture on small scale farms in southern malawi sustainable agricultural intensification is an urgent challenge for sub saharan africa one potential solution is to rely on local farmers knowledge for improved management of diverse on farm resources and integration among various farm enterprises in this article we analyze the farm level impact of one recent example namely the integrated aquaculture agriculture iaa technologies that have been developed and disseminated in a participatory manner in malawi based on a 2004 survey of 315 respondents 166 adopters and 149 nonadopters we test the hypothesis that adoption of iaa is associated with improved farm productivity and more efficient use of resources estimating a technical inefficiency function shows that iaa farms were significantly more efficient compared to nonadopters iaa farms also had higher total factor productivity higher farm income per hectare and higher returns to family labor

the impact of research led agricultural productivity growth on poverty reduction in africa asia and latin america abstract twenty percent of the world s population or 1 2 billion live on less than 1 per day 70 of these are rural and 90 are in asia and sub saharan africa research led technological change in agriculture generates sufficient productivity growth to give high rates of return in africa and asia and has a substantial impact on poverty currently reducing this number by 27 million per annum whereas productivity growth in industry and services has no impact the per capita cost of poverty reduction by means of agricultural research expenditures in africa is 144 and in asia 180 or 50 cents per day but this is covered by output growth by contrast the per capita cost for the richer countries of latin america is over 11 000

returns from research in economies with policy distortions hybrid sorghum in sudan conventional estimates of the economic return to agricultural research use market prices for the values of products and inputs on this basis economic rates of return are typically well above the cost of capital suggesting that more investment in research would be socially desirable but these estimates may be incorrect if as is often the case market prices are distorted by market failures or government policies and hence do not reflect social values this paper presents a simple partial equilibrium methodology with which to improve the measurement of social returns to research by taking account of multiple distortions in the market prices of products inputs and foreign exchange the method also takes account of variation in domestic and world prices making a product tradable in some years and nontradable in others the method is applied to the case of hageen dura 1 hd 1 sub saharan africa s first commercially successful hybrid sorghum hd 1 was released in the sudan in 1983 from the start of research in 1979 to 1992 the hd 1 breeding program had an estimated irr of 97 when all major policies in the sorghum market the fertilizer market and the exchange rate are taken into account the high rate of return to hd 1 research was due to the program s low cost and rapid payoff pointing to the potential value of small adaptive research programs taking full advantage of foreign technology and genetic material to produce locally appropriate crosses in a short period of time even in the highly distorted economies of africa such programs can yield very high payoffs

adapting household behavior to agricultural technology in west bengal india wage labor fertility and child schooling determinants the emergence of the high yielding varieties hyvs as alternatives to traditional varieties tvs of wheat rice and several other crops has been a major event in many developing countries during the last 2 decades the output income and employment augmenting effects of this modern technology have been documented in many regions of the world the existing studies have focused on aggregate economic indicators at national regional and sectoral levels analyses of technological change and household well being are now needed to explore the implications of this process for intrahousehold allocation of the resources among persons and activities the critical household activity is labor force participation in the market in own enterprise or in home production by male female and child members of the household these activities change as household demand for children changes and parents become able and willing to invest more in the health nutrition schooling and training of their children and thereby improve their productivity quality analysis of these interrelated household decisions helps to clarify efficient policies for rural development and to trace the societal repercussions of these policies ii background and objective although much has been written on the green revolution technology at the national and regional levels in india few studies have dealt with the eastern region of the country the question assumes special significance for the eastern indian states because of several factors first this region produces about three fourths of the country s output of rice the major food crop but the yield per acre is less than in other regions the new technology in rice came to this region at a later date

adoption of agricultural innovations in developing countries a survey this paper reviews various studies which have provided a description and possible explanation to patterns of innovation adoption in the agricultural sector the survey points out that the tendency of many studies to consider innovation adoption in dichotomous terms adoption nonadoption may not be appropriate in many cases where the actual decisions are defined over a more continuous range more attention needs to be given to the socio cultural and institutional environment in area studies so that their interrelation with economic factors affecting adoption can be inferred the presence of several interrelated innovations is another aspect that needs to be considered more carefully in future research since a number of simultaneous decisions may be involved furthermore the possibility of regular sequential patterns in adopting components of a new technological package should be specifically addressed in future studies finally the impact of differential adoption rates on land holding distribution merits attention in future research

technology adoption and agricultural price policy market interventions such as price supports or fertilizer subsidies can lead to gains from speeding up adoption of new technologies but the policies distort resource allocation a framework is developed for optimizing policies in light of the adoption allocation trade off based on adoption coefficients and production parameters from third world agriculture levels and duration of policies are estimated sensitivity analyses are performed gains are small at best and may be zero or negative in view of farmer costs of adjustment and deadweight losses from taxes profit technology adoption if new technologies are desirable why not use price supports or input subsidies to encourage faster technology adoption while frequently raised in policy deliberations this question has received little serious analysis particularly neglected has been the conflict or trade off between a gains in output as producers switch from old to new technologies and b the losses from resource use distortions brought about by price policies when output prices are raised or prices of inputs such as fertilizer are lowered the

investments in african agricultural research abstract over the past three decades africa s public agricultural research systems have changed in substantive ways the total number of researchers increased fourfold the dependency on expatriate researchers significantly declined while the education levels of national researchers improved initially the growth in research staff was matched by growth in expenditures but since the late 1970s real research spending has stagnated in addition loans and grants from donor agencies now account for a sizeable share of total funding for many african agricultural research systems many of the developments of the past decade in personnel expenditures and sources of support for public sector research and development r d in africa are not sustainable spending per scientist has declined continuously during the past 30 years most dramatically during the 1980s resources are spread increasingly thin over a growing group of researchers which has negative effects on the efficiency and effectiveness of agricultural research in africa

encouraging private sector research for tropical agriculture summary agricultural needs in poor tropical countries differ significantly from those in temperate rich countries yet little agricultural research is performed on products for the tropics private research is particularly concentrated in rich countries this is a result of significant failures in the market for research and development r d in particular the difficulty of preventing the resale of seed in developing countries to encourage private r d in tropical agriculture traditional funding of research may be usefully supplemented by a commitment to reward developers of specific new agricultural technologies rewards tied to adoption may be especially useful in increasing up take an illustration of how a commitment to reward developers of new agricultural technologies might work is provided

measuring the impacts of agricultural research on poverty reduction policymakers are increasingly calling upon agricultural research managers to consider poverty reduction objectives when making resource allocations the authors present a simple method to measure the impact of agricultural research on the poor this method has the advantage that it presents the results in a manner consistent with commonly used measures of poverty this consistency and focus should facilitate and enhance dialogue between policymakers and research managers when deciding on resource allocations and assessing impacts on poverty reduction an illustrative application is presented using data from malawi

canadian dairy policy and the returns to federal dairy cattle research abstract the economic surplus approach is used to estimate the returns to federal investments in dairy cattle research in canada a national supply function is estimated using time series data lagged research expenditures are included as explanatory variables in the model facilitating the calculation of marginal as well as average benefits from research simulation analysis is used to study the effects of product market distortions associated with canadian dairy policy as well as of the marginal excess burden on the rates of return to research and on the distribution of research benefits returns were found to be high at the margin distortions in the product market had a small effect on the overall returns to dairy cattle research but had a large impact on the distribution of research benefits rate of return estimates were found to be indicative of underinvestment even when the marginal excess burden was taken into account

measuring research benefits in an imperfect market voon 1994 recently analyzed the benefits of research in an imperfectly competitive market for an agricultural input studies of this type are important because the agricultural industries are becoming more concentrated and agricultural economists have begun to focus more attention on the implications of imperfect competition in the food and fiber sector the magnitude and distribution of research benefits under alternative market structures are important from both the perspective of agents incentives to undertake investments in research and allocating public monies to support research voon specifically compared the welfare benefit from a cost reducing innovation for an agricultural input under conditions of monopoly to perfect competition in the supply of the input the analysis was based on a framework of linear farm demand for the input and linear and rising marginal cost of supplying the input the key result based on simulations of the market equilibrium under alternative demand and cost elasticity configurations was that research benefits were greater under monopoly than under perfect competition this result is wrong specifically for

farmer s rights and genetic conservation in traditional farming systems abstract crop genetic resources are concentrated in some of the world s poorest farming systems these resources have been used by industrial countries without compensating farmers concerns for equity and conservation have led to proposals to protect crop genetic resources as intellectual property this paper argues that conventional intellectual property regulations e g utility patents and plant variety protection should not be used to protect crop genetic resources it suggests that farmers rights as an alternate form of intellectual property rights be used to indirectly compensate farmers by supporting genetic conservation it examines methods of in situ conservation for crop genetic resources

when financial aid is scarce the challenge of allocating college aid where it is needed most abstract inequality in college completion by income is a persistent problem often addressed through financial aid to lower income students prior research has found mixed effects of financial aid but research designs have not identified effects for the poorest students who may benefit the most this study exploits an eligibility cutoff induced by first come first served allocation of funds in the state of wisconsin the analysis focuses on two year technical colleges where there was a large funding shortage affecting students at all income levels i find positive effects of grant aid in reducing dropout and supporting degree completion with larger positive effects for the poorest students

returns to food and agricultural r d investments in sub saharan africa 1975 2014 research enabled growth in agricultural productivity is pivotal to sub saharan africa s overall economic growth prospects yet investments in research and development rd median 38 0 py around 78 5 of the evaluations relate to the commodity specific consequences of agricultural research while 5 5 report on the returns to an all agriculture aggregate the weight of commodity specific evaluation evidence is not especially congruent with the composition of agricultural production throughout africa nor to the best that can be determined the commodity orientation of public african agricultural r d

the diffusion of new agricultural technologies the case of crossbred cow technology in tanzania the recent literature on agricultural technology adoption shows that diffusion of new technologies varies significantly across space and time furthermore puzzles exist about why some seemingly profitable technologies are not adopted especially in livestock production we employ a hazard or duration function to explain diffusion of crossbred cow technology in a unique sample of tanzania farmers a farmer s adoption of crossbred technology depends positively on the proximity of his farm to other users on his schooling and on his access to credit and contact with extension agents

technology production environment and household income assessing the regional impacts of technological change abstract this paper clarifies the factors determining the welfare effects of improved agricultural technologies when technology diffusion is unevenly distributed across production environments household level income effects are shown to depend primarily on a whether the economy is open or closed with respect to world markets b whether households are net consumers or net producers of the commodity for which technological change occurs c whether households are adopters or non adopters of the new technology d the degree to which labor is mobile across agricultural regions and e government intervention in commodity and or factor markets a review of recent empirical work indicates considerable variation in the relative strength of these various factors across countries and that assumptions regarding the mechanism by which commodity prices are determined endogenously as in a closed economy or exogenously as in an open economy is especially critical

market distortions and benefits from research the benefits from cost reducing research and their distribution under a range of price policies are compared with those that would arise in the absence of the policies while any price policy affects the distribution of research benefits the net national or world benefits may be reduced lef unchanged or increased depending on the nature of the policy and the significance of the country in the world market for the commodity some implications for decisions on price policies and for distortions in incentives for the allocation of resources to research are raised

the importance of learning in the adoption of high yielding variety seeds to date due to the lack of panel data most micro level empirical studies of technology adoption have used cross sectional data these studies cannot examine the dynamic processes of adoption such as learning this article uses panel data to study the adoption of a new high yielding variety seed first it establishes that learning is an important variable in the adoption process second it establishes that cross sectional estimates of a dynamic process are biased but that the extent of this bias may be small third it illustrates the econometric methods needed to estimate a dynamic model when controlling for unobserved household heterogeneity

a dual approach to evaluating research benefits in the presence of trade distortions we present a new approach for evaluating the welfare consequences of technical change a major feature is its ability to incorporate multiple distortions and multiple sources of technical change in interrelated markets a modified balance of trade function provides money measures of welfare change in terms of producer profits consumer expenditures and tax revenues alternative specifications of technical change are presented to capture the effects of differences in the form of technical change in an illustrative numerical example the approach is applied to a case involving two distortions and technical changes in two related markets the example shows that the approach is reasonably easy to use and that accounting correctly for price distortions can have important implications for research benefit measures

not whether but where pell grants and college choices abstract pell grants are the largest financial aid vehicle in the united states and yet their role in shaping students college choices is not clear drawing on the enrollment decisions of four cohorts of tennessee high school graduates and quasi experimental pell eligibility derived from federal formulas we find little evidence that marginal pell eligibility affects whether or where students enroll in college inframarginal estimates suggest that students sort into colleges with 11 6 cents higher tuition per dollar of pell aid although other measures of college quality do not significantly improve over the counterfactual an investigation into mechanisms that might be muting student responses to pell favors the application process itself over grant size or institutional aid flexibility

who merits financial aid massachusetts adams scholarship abstract most states now fund merit based financial aid programs the effects of which depend on how strongly students react to changes in college costs i estimate such reactions using quasi experimental aspects of a recent massachusetts merit scholarship program intended to attract talented students to the state s public colleges despite its small monetary value the adams scholarship induced 6 of winners to choose four year public colleges instead of four year private colleges suggesting an elasticity of demand for public college enrollment above unity nonetheless most funds flowed to students who would have enrolled in public colleges absent the scholarship and the aid had no effect on winners overall college enrollment rate which already exceeded 90 regression discontinuity estimates are larger than those from difference in difference specifications because winners with relatively low academic skill and thus nearest the treatment threshold reacted much more strongly to the price change than did highly skilled winners conditional on academic skill low income winners reacted similarly to their higher income peers suggesting that previous research may have mistaken income heterogeneity for skill heterogeneity