institution induced productivity differences and patterns of international capital flows abstract this paper studies theoretically how the cross country differences in the institutional quality iq of the domestic credit markets shape the patterns of international capital flows when such iq differences cause productivity differences across countries iq affects productivity by changing productivity agency cost trade offs across heterogeneous investment projects which have opposite effects on the investment and capital flows from exogenous productivity differences the overall effect of iq could generate u shaped responses of the investment and capital flows this means that capital could flow from middle income to low income and high income countries and starting from a low iq a country could experience both growth and a current account surplus after an institutional reform more generally the results here offer some cautions when interpreting the evidence on the role of productivity and institutional differences on capital flows and question the validity of using financial frictions as a proxy for the quality of financial institutions

on the measurement of risk aversion from experimental data attitudes towards risk are measured for households in northern zambia using an experimental gambling approach with real payoffs that at maximum were equal to 30 of average total annual income per capita the results of the experiment show decreasing absolute risk aversion and increasing partial risk aversion determinants of risk aversion are investigated using random effects interval regression model exploiting the panel data structure of the repeated experiments wealth indicator variables are found to be significant and partial relative risk aversion decreases as wealth increases females are found to be more risk averse than males

production risk in multi output industries estimates from norwegian dairy farms farmers who produce multiple outputs are portfolio managers in the sense that they use inputs to balance expected economic return and variance of return this article estimates the structure of the stochastic multioutput production technology in norwegian dairy farming allowing for a more flexible specification of the technology than previous studies we find that an increase in input levels leads primarily to higher output variability and that inputs also influence the covariance of shocks between outputs risk reducing effects of inputs on outputs are primarily present in the covariance functions technical change leads to shifts in the profit distribution over the data period but no welfare improvement for risk averse farmers

the economic significance of national border effects to address the economic significance of national border effects this paper provides evidence on two fundamental questions 1 do large border effects arise because of high perceived price wedges between foreign and domestic products or because imports and domestic goods are very close substitutes and 2 if price wedges are important do they reflect distortionary barriers to trade or do they arise from nondistortionary factors such as differences in transactions costs or product characteristics i conclude that while border effects may imply barriers welfare costs and a role for policy distortions are probably not as substantial as initial border results suggested jel f1

the econometrics of damage control why specification matters the contribution of damage control agents to production differs fundamentally from that of standard inputs lands labor capital this paper develops an econometric model based on the key characteristics of damage control agents and examines its properties it demonstrates that standard production function specifications overestimate damage control agent productivity and have erroneous implications for the evolution of damage control agent productivity and use in response to changing environments e g the spread of pest resistance it also proposes several alternative specifications and discusses methods for estimating them

weak instruments diagnosis and cures in empirical econometrics what is the weak instruments wi problem and what causes it universal agreement does not exist on these questions we define weak instruments by two features i two stage least squares 2sls analysis is badly biased toward the ordinary least squares ols estimate and alternative unbiased estimators such as limited information maximum likelihood liml may not solve the problem and ii the standard first order asymptotic distribution does not give an accurate framework for inference thus a researcher may estimate bad results and not be aware of the outcome the cause of wi is often stated to be a low r or f statistic of the reduced form equation in the most commonly occurring situation of one right handside endogenous variable we find the situation is more complex with an additional factor the correlation between the stochastic disturbances of the structural equation and the reduced form that needs to be taken into account we discuss in this paper a specification test hahn and hausman 2002a for wi a caution against using no moments estimators such as liml in the wi situation and suggestions for different estimators an approach to inference of frank kleibergen 2002 for wi we end with a caution of how small biases can become large biases in the wi situation we begin with the limited information structural model under the assumptions of hausman 1983

do lower yielding farmers benefit from bt corn evidence from instrumental variable quantile regressions abstract there have been serious questions about whether lower yielding farmers in developing countries who are typically poor smallholders benefit from genetically modified crops like bacillus thuringensis bt corn this article examines this issue by estimating the heterogeneous impacts of bt corn adoption at different points of the yield distribution using farm level survey data from the philippines a recently developed estimation technique called instrumental variable quantile regression ivqr is used to assess the heterogeneous yield effects of bt corn adoption and at the same time address potential selection bias that usually plague impact assessment of agricultural technologies we find that the positive yield impact of bt corn in the philippines tend to be more strongly felt by farmers at the lower end of the yield distribution this result suggests that bt corn could be a pro poor technology since most of the lower yielding farmers in the philippines are poor smallholders with low incomes

intra national versus international trade in the european union why do national borders matter the first objective of this paper is to estimate border effects among european union countries in this context the specification of the gravity equation together with the choice of the distance measure are shown to be crucial for assessing the size of the border effect the second objective is to evaluate the determinants of the cross commodity variation in national border effects contrary to previous findings reported in the literature we show that trade barriers do provide an explanation in particular technical barriers to trade together with product specific information costs increase border effects whereas non tariff barriers are not significant our results further suggest that these barriers are not the only cause since the spatial clustering of firms is also found to matter

insurance moral hazard and chemical use in agriculture this paper examines how crop insurance affects corn farmers fertilizer and pesticide use in the u s midwest crop insurance might be expected to affect chemical use because of moral hazard insured farmers may undertake riskier production than do uninsured farmers results suggest that insurance exerts considerable influence on corn farmers chemical use decisions those purchasing insurance applied significantly more nitrogen per acre 19 spent more on pesticides 21 and treated more acreage with both herbicides and insecticides 7 and 63 than did those not purchasing insurance these results suggest that both fertilizer and pesticides may be risk increasing inputs

crop insurance valuation under alternative yield distributions considerable disagreement exists about the most appropriate characterization of farm level yield distributions yet the economic importance of alternative yield distribution specifications on crop insurance valuation has not been well documented the results of this study demonstrate that large differences in expected payouts from popular crop insurance products can arise solely from the parameterization chosen to represent yield distributions the results suggest that the frequently unexamined yield distribution specification may lead to economically significant errors in crop insurance policy rating and assessment of expected payouts from policies

do voters demand responsive governments evidence from indian disaster relief abstract using rainfall public relief and election data from india we examine how governments respond to adverse shocks and how voters react to these responses the data show that voters punish the incumbent party for weather events beyond its control however fewer voters punish the ruling party when its government responds vigorously to the crisis indicating that voters reward the government for responding to disasters we also find evidence suggesting that voters only respond to rainfall and government relief efforts during the year immediately preceding the election in accordance with these electoral incentives governments appear to be more generous with disaster relief in election years these results describe how failures in electoral accountability can lead to suboptimal policy outcomes

the importance of eu 15 borders for ceecs agri food exports the role of tariffs and non tariff measures in the pre accession period abstract this paper assesses the evolution of the eu 15 market access for the agri food products originating from ceecs a gravity model technique has been used to assess the overall trade resistance border effect and to weight its various components such as tariff and non tariff measures sanitary and phytosanitary standards other quality measures in the pre accession period 1999 2004 the findings reveal despite the undertaken integration and trade liberalisation processes a persisting and significant trade resistance for the ceecs agri food exports to the eu market even just prior their accession in 2004 still present difficulties in market access at the time are partially explained by tariff and non tariff measures while a large part of border effect remains in the domain of other presumably non trade policy related factors home bias consumer preferences etc these results indicate that despite the accession process customs union and adoption of the eu standards the trade integration of the enlarged eu market was not yet completed in 2004

two moment decision models and expected utility maximization two moment decision models are consistent with expected utility maximization only if the choice set or the agent s preferences are restricted this paper identifies a restriction which is sufficient to ensure this consistency and confirms that it holds in many economic models the implications for economic analysis are then derived two different approaches to representing an agent s preferences over strategies yielding random payoffs are in wide use under the mean standard deviation ms approach the agent is assumed to rank the alternatives according to the value of some function defined over the first two moments of the random payoff while the expected utility eu criterion assumes that the expected value of some utility function defined over payoffs is used instead the fact that there are these two competing approaches has generated a considerable literature some authors are concerned with the advantages and disadvantages of each while others deal with conditions under which the potentially different approaches would yield the same results or at least approximately so space does not

aggregation bias compositional change and the border effect borders affect the composition not only the level of interregional trade in disaggregated u s commodity flow data border effects vary substantially across commodities substantial border induced compositional change suggests the possibility that standard estimates suffer from aggregation bias arising from endogenous industry location patterns and the presence of zero observations in commodity level trade adjusting for these effects reduces the estimate of the aggregate border effect from 20 9 to 5 7 jel classification f14 f15 biais d agregation changement de composition et effet de frontieres les frontieres affectent la composition et pas seulement le volume de commerce inter regional une analyse des donnees desagregees des flux de commerce de biens des etats unis montre que l effet de frontieres varie substantiellement selon les biens le changement de composition du commerce engendre par les frontieres suggere la possibilite que les estimations usuelles souffrent d un biais d agregation resultant des patterns de localisation industrielle endogenes et de la presence d observations nulles dans le commerce de certains biens un ajustement pour tenir compte de ces effets suggere que les effets de frontieres passent de 20 9 a 5 7

semiparametric censored regression models aregression model is censored when the recorded data on the dependent variable cuts off outside a certain range with multiple observations at the endpoints of that range when the data are censored variation in the observed dependent variable will understate the effect of the regressors on the true dependent variable as a result standard ordinary least squares regression using censored data will typically result in coefficient estimates that are biased toward zero traditional statistical analysis uses maximum likelihood or related procedures to deal with the problem of censored data however the validity of such methods requires correct specification of the error distribution which can be problematic in practice in the past two decades a number of semiparametric alternatives for dealing with censored data have been proposed in a semiparametric approach part of the functional form of the model usually the regression function is parametrically specified by the researcher based upon plausible assumptions while the rest of the model is not parameterized 1 while the theoretical literature has produced several semiparametric estimators for the censored data model published applications of these estimators to empirical problems in economics have lagged far behind this paper reviews the intuition and computation of a handful of semiparametric estimators proposed for the censored regression model the various estimators are used to examine changes in black white earnings inequality during the

border effects in the enlarged eu area evidence from imports to accession countries by looking at imports of eastern european countries we provide novel insights on the importance and magnitude of border effects and on how they are linked with technical barriers to trade all central eastern european countries ceecs traded with themselves more than with other countries we grouped products into three categories depending on the importance of applicaple technical barriers our results show border effects are the largest for products where we expect to have the most important technical barriers we assess if border effects changed over the transition period and we find that for products where technical barriers are less important the magnitude of border effects was declining at the end of the 90s

attribution error in economic voting evidence from trade shocks this article exploits the international transmission of business cycles to examine the prevalence of attribution error in economic voting in a large panel of countries from 1990 to 2009 we find that voters on average exhibit a strong tendency to oust the incumbent governments during an economic downturn regardless of whether the recession is home grown or merely imported from trading partners however we find important heterogeneity in the extent of attribution error a split sample analysis shows that countries with more experienced voters more educated voters and possibly more informed voters all conditions that have been shown to mitigate other voter agency problems do better in distinguishing imported from domestic growth jel e3 e6

pests and pesticides risk and risk aversion abstract theoretical and applied literature on risk in decision making for agricultural pest control is reviewed risk can affect pesticide decision making either because of risk aversion or because of its influence on expected profit it is concluded that risk does not necessarily lead to increased pesticide use by individual farmers uncertainty about some variables such as pest density and pest mortality does lead to higher optimal pesticide use under risk aversion however uncertainty about other important variables such as output price and yield leads to lower optimal levels of pesticide use neglect of these variables in most studies has led to the false assumption that pesticides are always risk reducing inputs furthermore there is evidence that in general the pesticide dosage which maximises expected profit is lower under risk than under certainty depending on the balance of forces to increase and decrease pesticide use under risk in many circumstances the net effect of risk on optimal decision making for pest control may be minimal the effect on risk of information about pest density and other variables as in integrated pest management programmes is discussed evidence on this issue is mixed a range of analytical techniques for analysing risk in pest control is reviewed throughout the paper gaps in the existing literature are identified

impact of bt cotton in china abstract a sample of 283 cotton farmers in northern china was surveyed in december 1999 farmers that used cotton engineered to produce the bacillus thuringiensis bt toxin substantially reduced the use of pesticide without reducing the output ha or quality of cotton this resulted in substantial economic benefits for small farmers consumers did not benefit directly farmers obtained the major share of benefits and because of weak intellectual property rights very little went back to government research institutes or foreign firms that developed these varieties farmers using bt cotton reported fewer pesticide poisonings than those using conventional cotton

attribution bias in consumer choice when judging the value of a good people may be overly influenced by the state in which they previously consumed it for example someone who tries out a new restaurant while very hungry may subsequently rate it as high quality even if the food is mediocre we produce a simple framework for this form of attribution bias that embeds a standard model of decision making as a special case we test for attribution bias across two consumer decisions first we conduct an experiment in which we randomly manipulate the thirst of participants prior to consuming a new drink second using data from thousands of amusement park visitors we explore how pleasant weather during their most recent trip affects their stated and actual likelihood of returning in both of these domains we find evidence that people misattribute the influence of a temporary state to a stable quality of the consumption good we provide evidence against several alternative accounts for our findings and discuss the broader implications of attribution bias in economic decision making

damage control productivity why econometrics matters cet article consiste d une part en une critique de l approche de lichtenberg et zilberman 1986 pour l explication de la surestimation habituelle de la productivite marginale des pesticides les auteurs montrent que l argument selon lequel les fonctions de production standard cobb douglas translog ne seraient pas adequates pour la modelisation de l action des pesticides sur les rendements agricoles n est vraisemblablement valide que dans des cas tres particuliers d autre part on propose une autre explication potentielle de cette surestimation de la productivite marginale des pesticides l existence de biais d heterogeneite tels qu ils ont ete mis en evidence par mundlak 1961 ces discussions theoriques sont illustrees a l aide d estimations et de tests realises dans le cadre de la methode des moments generalisee a partir d un panel issu du rica de 496 agriculteurs suivis de 1987 a 1990

the economics and econometrics of damage control concern for the potentially harmful side effects of agricultural chemical inputs especially pesticides highlights the need to accurately determine the economic levels of their use we consider three model specification issues interaction of direct production inputs with damage control inputs in damage abatement justification for a priori exclusion of production inputs from the abatement function and the motivations and consequences of alternative stochastic specifications empirical analysis using farm level data shows that misspecification of the stochastic element in the production function can overestimate the marginal physical productivity of pesticides and grossly underestimate the responsiveness of demand to increases in pesticide prices

bt cotton in india field trial results and economic projections abstract the performance of bt cotton in india is analyzed on the basis of field trial data from 2001 the amounts of pesticides applied during the trials were reduced to one third of what was used in conventional cotton while under severe pest pressure yield gains were 80 productivity effects are modeled econometrically with a damage control specification the first approval for the commercial cultivation of bt hybrids was given in 2002 by 2005 the technology is expected to cover one quarter of total indian cotton area medium term projections show sizeable welfare gains for the overall economy with farmers being the main beneficiaries

exports and economic growth in central and east european countries during transition this paper quantifies the contribution of exports to economic growth in central and east european countries ceecs during transition two theoretical models are examined the first is based on an aggregate production function which includes exports as an additional input while the second is based on a two sector exports and non exports model where exports provide positive externalities in non export production each model is estimated with both fixed and random effects using panel data results show that the random effects model is preferred and that exports have a significant impact on economic growth

sequential decision making in production models single equation estimates of production models usually are justified by the assumption that production inputs are chosen as part of a one period decision problem yet most production decisions in agriculture are made sequentially in this paper the farmer s optimal input choices are modeled as optimal controls in a stochastic control problem a two period cobb douglas example is used to show that sequential solutions to production problems may yield models which require either single equation or simultaneous equation estimators functional separability stochastic specification and behavior under uncertainty are discussed in the context of dynamic production models

production risk pesticide use and gm crop technology in south africa technology involving genetic modification of crops has the potential to make a contribution to rural poverty reduction in many developing countries thus far pesticide producing bacillus thuringensis bt varieties of cotton have been the main gm crops under cultivation in developing nations several studies have evaluated the farm level performance of bt varieties in comparison to conventional ones by estimating production technology and have mostly found bt technology to be very successful in raising output and or reducing pesticide input however the production risk properties of this technology have not been studied although they are likely to be important to risk averse smallholders this study investigates the output risk aspects of bt technology by estimating two flexible risk production function models allowing technology to independently affect the mean and higher moments of output the first is the popular just pope model and the second is a more general damage control flexible risk mode

interactions between agricultural and resource policy the importance of attitudes toward risk using a method proposed by meyer for deriving comparative statics results in the presence of risk this paper analyzes the effects of various agricultural and environmental policy alternatives on the choices of a risk averse producer with a just and pope production function many commonly held beliefs about policy effects are not supported unambiguously by economic theory for example a tax on pesticides will not necessarily reduce pesticide use or average output and a reduction in price of agricultural output will not necessarily lead to a reduction in use of water or agricultural chemicals

can gm technologies help the poor the impact of bt cotton in makhathini flats kwazulu natal abstract the results of a two year survey of smallholders in makhathini flats kwazulu natal show that farmers who adopted bt cotton in 1999 2000 benefited according to all the measures used higher yields and lower chemical costs outweighed higher seed costs giving higher gross margins these measures showed negative benefits in 1998 99 which conflicts with continued adoption but stochastic efficiency frontier estimation which takes account of the labor saved showed that adopters averaged 88 efficiency as compared with 66 for the nonadopters in 1999 2000 when late rains lowered yields the gap widened to 74 for adopters and 48 for nonadopters

the psychological effect of weather on car purchases when buying durable goods consumers must forecast how much utility they will derive from future consumption including consumption in different states of the world this can be complicated for consumers because making intertemporal evaluations may expose them to a variety of psychological biases such as present bias projection bias and salience effects we investigate whether consumers are affected by such intertemporal biases when they purchase automobiles using data for more than 40 million vehicle transactions we explore the impact of weather on purchasing decisions we find that the choice to purchase a convertible or a four wheel drive is highly dependent on the weather at the time of purchase in a way that is inconsistent with classical utility theory we consider a range of rational explanations for the empirical effects we find but none can explain fully the effects we estimate we then discuss and explore projection bias and salience as two primary psychological mechanisms that are consistent with our results jel codes d03 d12

something to talk about social spillovers in movie consumption we exploit the randomness of weather and the relationship between weather and moviegoing to quantify social spillovers in movie consumption instrumenting for early viewership with plausibly exogenous weather shocks captured in lasso chosen instruments we find that shocks to opening weekend viewership are doubled over the following five weekends our estimated momentum arises almost exclusively at the local level and we find no evidence that it varies with either ex post movie quality or the precision of ex ante information about movie quality suggesting that the observed momentum is driven in part by a preference for shared experience and not only by social learning

national borders and international trade evidence from the european union in this paper the impact of national borders on international trade within the european union is considered using a gravity model i find that averaged over all eu countries intranational trade is about ten times as high as international trade with an eu partner country of similar size and distance this relatively strong home bias suggests that even within the european union national borders still have a decisive impact on trade patterns jel classification f02 f14 f15 o52 ce memoire examine l impact des frontieres nationales sur le commerce international a l interieur de l union europeenne on montre que en moyenne pour tous les pays de l union europeenne le commerce intranational est a peu pres dix fois plus important que le commerce international avec un pays partenaire de l union europeenne de meme taille et a meme distance ce degre relativement important de preference nationale suggere que meme dans le cadre de l union europeenne les frontieres nationales ont encore un impact determinant sur les patterns de commerce

determinants of foreign direct investment empirical evidence from eu accession candidates this study examines bilateral foreign direct investments fdi between the members of the european union and eight central and east european candidate ceec economies in transition awaiting accession into the european union eu crosssection data were obtained for bulgaria czech republic estonia hungary poland romania slovak republic and slovenia for 1997 once the main characteristics of fdi recipient and donor nations are identified in a bilateral framework it will be feasible to predict future fdi inflows this study reveals that the key determinants of fdi inflows in ceecs are size of the host economy host country risk labour costs in host country and openness to trade countries that are receiving fewer foreign investments could make themselves more attractive to potential donor nations by focusing on some of the key determinants identified by this study

household s risk attitudes in indonesian villages this paper estimates attitudes towards risk using data obtained through interviews of 400 households in villages in indonesia participants were invited to play investment games in order to identify household risk attitudes the game result supports the hypothesis of non decreasing partial relative risk aversion using an ordered probit model the determinants of risk attitude were investigated the results show that the variable of co residence is important an individual living with his or her parents is less risk averse than an individual in a nuclear household co residence can be viewed as a type of security blanket partial relative risk aversion decreases with the level of education and wealth