nonparametric estimation of sample selection models sample selection models provide an important way of accounting for economic decisions that combine discrete and continuous choices and of correcting for nonrandom sampling nonparametric estimators for these models are developed in this paper these can be used for estimating shapes and important economic quantities as in standard nonparametnc regression endogeneity of regressors of interest is allowed for series estimators for these models are developed which are useful for imposing additivity restnctions that arise from selection corrections convergence rates and asymptotic normality results are derived an application to returns to schooling among australian young females is given

the theoretical effects of farm policies on optimal leverage and the probability of equity losses the degree to which the use of debt is increased in response to risk reducing and income augmenting farm policies is studied theoretically a mean variance model is used to determine the optimal leverage adjustment then the effects of policies on the cumulative probability of earning very low rates of return on equity are examined the evidence suggests that farm policies induce a large enough increase in financial leverage to increase the probability of farmers having negative returns to equity

inter vivos transfers and exchange most parents divide their bequests equally among their children whereas inter vivos transfers are usually unequal we propose that exchange is better for inducing inter vivos transfers than bequests inter vivos transfers can be adjusted quickly to the amount of care are less costly than writing a will and can be kept secret from other family members and the public the results from national longitudinal data show that as expected if a parent gives any inter vivos transfers she is more likely to give to children who provide informal care informal care has no effect on the equality of intended bequests

general training in labor markets common value auctions with unobservable investment abstract this paper studies the puzzle of employer financing for the general training of workers a parsimonious theory is developed based on asymmetric information between employers about the quantity of training the labor market is modeled as a common value auction with an informed and an uninformed bidder the novel feature of the game is that one of the bidders can make an unobservable investment that increases the value of the item before the auction by randomizing the amount of training provided an employer can create an endogenous adverse selection problem enabling it to compress the wage structure and capture some returns from its training investment the model generates continuous equilibrium wage and training distributions and identical employees can receive different wage offers and training levels a parametric example is used to illustrate how the shape of the wage distribution depends on the elasticity of production with respect to human capital

the connection between public transfers and private interfamily transfers abstract this paper investigates the anti poverty effectiveness of public transfers taking private transfer responses into account widespread altruistically motivated private transfers would neutralize the distributional impact of public transfers but exchange motivated transfers can reinforce the effects of public transfers on the distribution of economic well being the common technique for gauging anti poverty effectiveness subtracting public transfers from other income and measuring the poverty rate counterfactual yields results that are close to a more complex procedure that takes private transfer responses into account and some of the empirical findings suggest an exchange rather than altruistic motive for private transfers indicating that the effects of public transfers can be magnified by private behavior this is an exact reversal of the prediction that public transfers merely supplant private ones

an empirical examination of the relation between debt contracts and management incentives abstract prior research on the factors influencing the use of debt covenants restricting dividends and additional borrowing is extended by considering management incentives when alternative incentive variables are considered separately we find covenants have a significant negative relation to ceo cash compensation an insignificant relation to the value of ceo equity held and significant positive relations to both the ratio of the value of ceo equity holdings to cash compensation and the fraction of equity held by the ceo in two stage simultaneous equations models only the latter is significant when jointly considered with each of the other incentive variables

two stage residual inclusion estimation addressing endogeneity in health econometric modeling the paper focuses on two estimation methods that have been widely used to address endogeneity in empirical research in health economics and health services research two stage predictor substitution 2sps and two stage residual inclusion 2sri 2sps is the rote extension to nonlinear models of the popular linear two stage least squares estimator the 2sri estimator is similar except that in the second stage regression the endogenous variables are not replaced by first stage predictors instead first stage residuals are included as additional regressors in a generic parametric framework we show that 2sri is consistent and 2sps is not results from a simulation study and an illustrative example also recommend against 2sps and favor 2sri our findings are important given that there are many prominent examples of the application of inconsistent 2sps in the recent literature this study can be used as a guide by future researchers in health economics who are confronted with endogeneity in their empirical work

reputation for quality and adverse selection abstract we analyze a dynamic market with a seller who can make a one time investment that affects the returns of tradable assets the potential buyers of the assets cannot observe the seller s investment prior to the trade or verify it in any way after the trade the market faces two types of inefficiency the ex ante inefficiency i e the seller s moral hazard problem and the ex post inefficiency i e inefficient ex post allocations due to the adverse selection problem we analyze how the observability of information by future buyers through which the seller builds a reputation affects the two types of inefficiency as well as the interplay between them

prospect theory and risk preferences of oregon seed producers prospect theory relates risk preference classifications to gains and losses from a reference income level this study applies prospect theory to reinterpret historical studies of risk preferences of oregon grass seed growers a significant relationship between changes in classifications of preferences and changes in income was found results indicated that those who lost income were concentrated in the category of changing to risk preferrers income changes calculated from crop combinations were also found to be correlated in a theoretically correct pattern with positive measures of risk from crop enterprises the research therefore is consistent with further applications of prospect theory to farm management

estimating labour supply responses using tax reforms the 1980 s tax reforms and the changing dispersion of wages offer one of the best opportunities yet to estimate labor supply effects nevertheless changing sample composition aggregate shocks the changing composition of the tax paying population and discontinuities in the tax system create serious identification and estimation problems we develop grouping estimators that address these issues our results reveal positive and moderately sized wage elasticities we also find negative income effects for women with children

ethnic enclaves and immigrant labor market outcomes quasi experimental evidence i examine the effects of the ethnic enclave size on labor market outcomes of immigrants i account for ability sorting into enclaves by exploiting a danish spatial dispersal policy under which refugees were randomly dispersed across locations first i find strong evidence that refugees with unfavorable unobserved characteristics self select into ethnic enclaves second a relative standard deviation increase in the ethnic enclave size increases annual earnings by 18 on average irrespective of skill level third further findings are consistent with the explanation that ethnic networks disseminate job information which increases the job worker match quality and thereby the hourly wage rate

cooperative investments and the value of contracting recent articles have shown that contracts can support the efficient outcome for bilateral trade even in the face of specific investments and incomplete contracting these studies typically considered selfish investments that benefit the investor e g the seller s investment reduces her production costs the authors find very different results for cooperative investments that directly benefit the investor s partner e g the seller s investment improves the buyer s value of the good most importantly if committing not to renegotiate the contract is impossible then contracting has no value i e the parties cannot do better than to abandon contracting altogether in favor of ex post negotiation

comparing features of convenient estimators for binary choice models with endogenous regressors abstract we discuss the relative advantages and disadvantages of four types of convenient estimators of binary choice models when regressors may be endogenous or mismeasured or when errors are likely to be heteroscedastic for example such models arise when treatment is not randomly assigned and outcomes are binary the estimators we compare are the two stage least squares linear probability model maximum likelihood estimation control function estimators and special regressor methods we specifically focus on models and associated estimators that are easy to implement also for calculating choice probabilities and regressor marginal effects we propose the average index function aif which unlike the average structural function asf is always easy to estimate

renegotiation and optimality in agency contracts we analyse renegotiation in a hidden action principal agent model contract renegotiation offers are made by the agent a refinement is imposed on the principal s beliefs if precisely one action is optimal with respect to both the principal s and the agent s contracts the principal believes that that action has been taken with the refinement imposed perfect bayesian equilibrium allocations are identical to the second best in the classical principal agent model without renegotiation when renegotiation is led by the agent and when equilibria satisfy the refinement equilibrium allocations are ex ante efficient incentive contracting is a common mechanism for promoting ex ante investments and for avoiding ex post opportunistic behaviour in a long term or continuing economic relationship the classical principal agent model holmstrom 1979 grossman and hart 1983 is a natural framework for this class of problem in such a model a risk averse agent performs an action on behalf of a risk neutral principal the agent s action is unobservable and affects the principal s revenue in a random fashion the derivation and characterization of efficient compensation schemes have been the major focus in the principal agent literature generally the incentives to motivate a costly action from the agent take the form of profit sharing the agent s reward is made contingent on his random performance outcomes

testing for nonnormality in farm net returns cash returns from farming are expected to be nonnormally distributed under a wide range of joint price yield distributions adequate testing for such nonnormality requires use of proper whitening procedures as well as appropriate statistics with tests and sample sizes commonly employed a false imputation of normality often will be made however positive correlation between skewness and kurtosis reduces the likelihood of associated decision errors these results are illustrated with data for

impact of conservation agriculture technology on household welfare in zambia this article examines the determinants and impact of conservation agriculture ca technology adoption on farm household welfare in zambia to account for selection bias from both observable and unobservable factors an endogenous switching regression model is employed to estimate the impact of the technology on continuous outcomes like farm output throughput accounting ratio tar poverty gap and severity of poverty a recursive bivariate probit model is however used for the estimation of impact of adoption on a binary outcome like poverty headcount the empirical findings demonstrate that the adoption of ca technology increases maize output and farm tar and reduces household poverty moreover the results reveal that farmers years of schooling social networks access to credit extension services and machinery as well as soil quality positively influence adoption of ca technology

the dynamics of pretrial negotiation it is shown that many cases proceed to court despite ample opportunity for interaction and much of the settlement takes place on the courthouse steps the deadline effect when fixed costs of bargaining are introduced a u shaped pattern of settlement appears with a greater chance of settlement at the beginning and at the end of negotiations than in the middle these characteristics persist even as the time between offers approaches zero the theoretical predictions are consistent with the stylized facts a large proportion of the lawsuits that are settled out of court are settled very close to the trial date or in the first several days of the trial 3 although the deadline effect appears in many other settings as well it has little theoretical support 4

procurement and renegotiation parties bound by an incomplete contract have an incentive to renegotiate after acquiring new information the issue of the parties investment in the relationship before renegotiation is analyzed in a simple two period procurement model the firm invests in the first period it then learns its production cost and the sponsor learns its value for the project williamson s underinvestment presumption is shown to hold under very general assumptions about bargaining and about the ex post asymmetry of information as long as the firm s investment is not observable by the sponsor the introduction of a cancellation fee may well lead to even less investment contrary to what is sometimes argued the role of ex ante price fixing as an alternative way to reintroduce some form of commitment and the problem of cost overruns are discussed last it is shown that if investment is observable by the sponsor andthus may become a joint decision variable the two parties may choose to under or overinvest

when do experts cheat and whom do they target a credence good is a product or service whose usefulness or necessity is better known to the seller than to the buyer this information asymmetry often persists even after the credence good is consumed i propose two new theories of expert cheating suggesting that identifiable heterogeneities among customers can cause expert sellers to defraud their customers according to these theories cheating arises as a substitute for price discrimination and experts cheat selectively for instance experts target high valuation and high cost customers finally selective cheating may damage the communication of useful information from customers to experts and result in inferior services

expected utility debt equity structure and risk balancing the potential effects of agricultural policy on the financial structure of farms is often not fully considered although it has been recognized that policies that reduce business risk may induce farmers to increase financial risk the effects of income policies on farm leverage have not been investigated this paper explores the relationship between farm policy and debt equity structure for a risk averse expected utility maximizer agricultural economists have demonstrated considerable theoretical interest in the futility of agricultural policy many have suggested that policies increasing farm revenues may well result in higher land prices such that landowners receive a windfall gain but incomes of tenant farmers and new entrants are unchanged gabriel and baker added to this nihilism by suggesting that policies that reduce business risk might induce choices that increase financial risk although this important hypothesis is difficult to test gabriel and baker s empirical results appear to be consistent with their hypothesis this paper suggests an alternative to the gabriel and baker model for analysis of the risk balancing hypothesis that is a structural model of the overall debt equity decision for agricultural proprietors structural variables include not only business risk but also expected return from farm operations expected capital gains from land and interest cost the primary assumptions of the model are that a the proprietor s objective is to maximize the expected utility of the rate of return on equity b the utility function of wealth is negative exponential c a normal distribution exists for the rate of return on assets and d taxes are ignored risk concepts and leverage

illegal drug use and employment this article investigates the relationship between employment and the use of marijuana and cocaine for males in national longitudinal survey of youth data from 1984 and 1988 previous studies yielding mixed evidence may have inadequately accounted for the simultaneity between drug consumption and employment i implement an instrumental variable procedure that identifies drug use with variables that are empirically unrelated to employment including the regional cocaine price and a state marijuana decriminalization indicator results indicate that the use of each drug substantially reduces the likelihood of employment exogeneity tests reveal that standard probit estimates are severely biased toward zero

a dynamic analysis of the market for wide bodied commercial aircraft this paper uses an empirical dynamic oligopoly model of the commercial aircraft industry to analyse industry pricing industry performance and optimal industry policy a novel feature of the model with respect to the previous literature is that entry exit prices and quantities are endogenously determined in markov perfect equilibrium mpe we find that many unusual aspects of the aircraft data such as high concentration and persistent pricing below static marginal cost are explained by this model we also find that the unconstrained mpe is quite efficient from a social perspective providing only 10 less welfare on average than a social planner would obtain finally we provide simulation evidence that an anti trust policy in the form of a concentration restriction would be welfare reducing

time related characteristics of tenancy contracts and investment in soil conservation practices we present a dynamic model that shows how different types of land tenancy contracts and their time related characteristics influence farmers decisions to invest in soil improvement and productive inputs using recent household and plot level data from the brong ahafo region in ghana we analyze the impact of land tenancy arrangements contract duration as well as the number of times the contract has been renewed in the past on the intensity of investment in soil conservation measures such as ditches and farmyard manure and productive inputs like chemical fertilizer the empirical findings generally confirm the predictions of the theoretical model and reveal that the intensity of investments on different plots cultivated by a given farmer varies significantly with the type of tenancy arrangement on the plot as well as the time related characteristics of the contract

firms adoption of international standards evidence from the ethiopian floriculture sector global trade in agriculture and food products is increasingly governed by an array of standards a survey conducted in 2010 covering all operational firms in the nascent floriculture industry in ethiopia revealed that only 36 per cent have managed to acquire certification for international private standards this study uses a census based panel dataset from ethiopian floriculture to empirically examine the determinants of firms adoption of international private standards it also analyses overall industry level efforts and public private partnership to launch and implement a national scheme for good agricultural practice and build firms capacity to comply with the standards key words standards certification floriculture exports estate farms ethiopia africa

effects of sustained financial stress on the financial structure and performance of the farm sector financial stress in agriculture as indicated by the problems identified in jolly et al s paper can be caused by many factors farm failures can be the result of everything from poor individual management decisions to weather conditions in other countries differences in the causes of failures have different implications for the analysis of the effects of continuing stress if for example all of the farmers who are failing today are simply poor managers then the effects of continued stress are likely to be minimal in fact the elimination of poor managers might bring about net social benefits by reducing the cost of food if good managers are being forced out of agriculture because of public policies however the effects may be substantially different thus while the central purpose of this paper is to describe the measurable effects of sustained financial stress on the farm sector identifying the causes of today s difficulties is an integral part of the research recent literature hughes and penson perry et al knutson richardson and jolly grant et al suggests three principal reasons for farmers difficulties macroeconomic policies farm policies and individual management decisions the economic environment facing farmers has certainly played a central role in the current cash flow difficulties and or resulting business failures characterizing american agriculture macroeconomic policies of recent years have generated prices and interest rates that have skewed economic returns in the economy away from capital intensive and export sensitive industries such as farming farm policies have also helped to shape current conditions although farm programs under the 1977 and 1981 farm bills were sufficient to mask the early stages of the current decline in farm profitability the resources needed to continue to offset other factors have not been nor are they likely to be forthcoming finally some farmers and farm lenders have contributed to their own problems many of the producers currently confronted with financial difficulties overcommitted themselves during the 1970s assuming continuation of favorable economic conditions as noted by king and sonka because longterm debt and variable interest rates are often used to gain control of assets managers need to consider the viability of a specific decision for several policy and macroeconomic scenarios in addition to the current policy the rest of this paper is presented in three parts first discussion is focused on the aggregate effects of pursuing different macroeconomic policies through the end of this decade the next section deals with the impacts of continued stress on different types of farms given different beginning leverage positions and farm policies finally some of the effects of continued farm financial distress beyond the farm gate are discussed

semi parametric estimation of simultaneous equations with limited dependent variables a case study of female labour supply we propose a general strategy to estimate semi parametrically simultaneous equations with limited dependent variables first each reduced form rf is estimated with various semi parametric methods second the specification of each rf is tested to select an appropriate method third the structural form sf equations are estimated using minimum distance methods and the restrictions among the sf and rf parameters a case study of female labour supply is presented

gender roles and human capital inverstment the relationship between traditional attitudes and female labour market performance this paper investigates the relationship between the labour market behaviour of females and their attitudes towards traditional gender roles an attitudes index is constructed by employing individuals responses to statements related to the role of women and examined to determine whether it is correlated with individual characteristics the paper examines whether these attitudes influence human capital attainment and whether they are weakly exogenous to educational attainment it also focuses on the impact of these traditio nal attitudes upon labour supply and the return to education the results are dramatic it is found that females attitudes towards working women are developed in their youth and result in substantial reductions in their human capital investment labour supply and rates of return to education furthermore it is found that these attitudes are determined outside the educational process

pairwise difference estimation with nonparametric control variables this paper extends the pairwise difference estimators for various semilinear limited dependent variable models proposed by honore and powell 2005 to permit the regressor appearing in the nonparametric component to itself depend upon a conditional expectation that is nonparametrically estimated this permits the estimation approach to be applied to nonlinear models with sample selectivity and or endogeneity in which a control variable for selectivity or endogeneity is nonparametrically estimated we develop the relevant asymptotic theory for the proposed estimators and we illustrate the theory to derive the asymptotic distribution of the estimator for the partially linear logit model

information control in the hold up problem we study the use of information control to mitigate hold up risks we identify a distinction between asymmetric information that creates an ex ante investment incentive and asymmetric information that causes ex post inefficiency which then allows ex post inefficiency to be eliminated without compromising the ex ante investment incentive we characterize the properties of the optimal information structure and the payoffs and welfare achievable with information control in the presence of hold up risks

selection criteria for a microeconometric model of labour supply the wide variety of observed behaviour that is displayed in survey data suggests that microeconometric models should allow a reasonable degree of flexibility in specification however since these models are generally used for policy analysis they are required to satisfy some degree of theoretical consistency this requirement has generally led to the adoption of rather simple inflexible models based on additive preferences or linear labour supply responses we estimate and test a sequence of models for the labour supply of married working women emphasizing the importance of testing both the thecretical and statistical assumptions underlying the models

semiparametric estimation of the intercept of a sample selection model this paper provides a consistent and asymptotically normal estimator for the intercept of a semiparametrically estimated sample selection model the estimator uses a decreasingly small fraction of all observations as the sample size goes to infinity as in heckman 1990 in the semiparametrics literature estimation of the intercept has typically been subsumed in the nonparametric sample selection bias correction term the estimation of the intercept however is important from an economic perspective for instance it permits one to determine the wage gap between unionized and nonunionized workers decompose the wage differential between different socioeconomic groups e g male female and black white and evaluate the net benefits of a social programme

estimation of limited dependent variable models with dummy endogenous regressors applied economists have long struggled with the question of how to accommodate binary endogenous regressors in models with binary and nonnegative outcomes i argue here that much of the difculty with limited dependent variables comes from a focus on structural parameters such as index coefcients instead of causal effects once the object of estimation is taken to be the causal effect of treatment several simple strategies are available these include conventional two stage least squares multiplicative models for conditional means linear approximation of nonlinear causal models models for distribution effects and quantile regression with an endogenous binary regressor the estimation strategies discussed in the article are illustrated by using multiple births to estimate the effect of childbearing on employment status and hours of work

unobservable investment and the hold up problem we study a two person bargaining problem in which the buyer may invest and increase his valuation of the object before bargaining we show that if all offers are made by the seller and the time between offers is small then the buyer invests efficiently and the seller extracts all of the surplus hence bargaining with frequently repeated offers remedies the hold up problem even when the agent who makes the relation specific investment has no bargaining power and contracting is not possible we consider alternative formulations with uncertain gains from trade or two sided investment

investment and screening under asymmetric endogenous information this article provides an analysis of screening contracts in a complete but imperfect information environment as opposed to the usual incomplete information bayesian environment an agent faces a hold up situation while making a cost reducing specific investment that is not observed by the principal to prevent the hold up the agent randomizes his investment strategy and the principal offers a screening contract the informational rents provided by the equilibrium contract finance the investment for a large class of cost functions the randomization is such that the marginal surplus follows a power distribution

dynamic market for lemons with endogenous quality choice by the seller we analyze a dynamic market for lemons in which the quality of the good is endogenously determined by the seller potential buyers sequentially submit offers to one seller the seller can make an investment that determines the quality of the item at the beginning of the game which is unobservable to buyers at the interim stage of the game the information and payoff structures are the same as in the market for lemons our main result is that the possibility of trade does not create any efficiency gain if i the common discounting is low and ii the static incentive constraints preclude the mutually agreeable ex ante contract under which the trade happens with probability one our result does not depend on whether the offers by buyers are private or public

information and bargaining in the hold up problem this article incorporates an information structure with partial information into the canonical hold up problem the optimal information structure balances the tradeoff between ex ante efficiency the information rent effect and ex post efficiency the bargaining disagreement effect with one shot bargaining it occurs at an intermediate level of information asymmetry when there is repeated bargaining it is attained with perfect asymmetry asymmetric information the parameter that is frequently ignored in the literature turns out to be an important welfare instrument for the hold up problem our results therefore provide a basis for institutional design regarding the optimal control of information flow

is there a dead spot new evidence on fomc decisions before elections using new data that chronicle the fed s internal forecast of the output gap from 1973 to 1998 this paper tests for an electoral cycle in the decisions of the federal open market committee fomc the paper provides evidence of a dead spot in the committee s decisions before presidential elections for given values of these internal forecasts the fomc is less likely to decide to tighten monetary policy in the year preceding a presidential election than at other times

rice prices and income distribution in thailand a non parametric analysis rice is a staple crop in thailand significantly entering both household production and consumption this paper examines the effect of rice prices on the distribution of real income across households taking into account household characteristics and geographical location the data set is a large scale survey of 11 893 households simple nonparametric techniques for regression and density estimation are used these methods depend on few assumptions and generate flexible graphical results that are directly informative about the problem at hand the main results are that higher rice prices should benefit all rural households but the largest benefits accrue to rural households in the middle of the income distribution copyright 1989 by royal economic society

land tenure differences and investment in land improvement measures theoretical and empirical analyses this article develops a theoretical framework to examine the relationship between land tenure arrangements and households investment in soil improving and conservation measures it then analyzes this relationship with a multivariate probit model based on detailed plot level data from villages in the brong ahafo region of ghana a major hypothesis tested is that investment in productivity enhancing and conservation techniques are influenced by land tenure arrangements the theoretical analysis and empirical results generally reveal that land tenure differences significantly influence farmers decisions to invest in land improving and conservation measures the findings also show that tenure security does affect farm productivity

estimation in a class of simultaneous equation limited dependent variable models estimation in a class of simultaneous equation limited dependent variable models is considered the minimum chi squared method is used to compare the asymptotic relative efficiency of marginal and new conditional maximum likelihood estimators for this class of models efficient minimum chi squared estimation procedures are described a two step algorithm based on a conditional maximum likelihood estimator provides a natural framework for both computing a linearized and locating the joint maximum likelihood estimator the unimodality of the simultaneous equation tobit likelihood function is proved and this model is used to illustrate the empirical application of some of the estimators considered in the paper the relative efficiency of these estimators in the simultaneous equation tobit model is examined in a set of monte carlo experiments many applications of microeconomic theory to individual data face the joint problems of censoring and simultaneity in particular the dependent variable under investigation may not be continuously observed and some of the conditioning variables representing the outcome of other decisions by the individual may be simultaneously determined smith and blundell 1986 developed an asymptotically efficient test for exogeneity or simultaneity in the simultaneous equation tobit model as a byproduct a conditional maximum likelihood estimator was obtained which is consistent under the alternative hypothesis of simultaneity nelson and olsen 1978 amemiya 1978 1979 and heckman 1978 consider a number of consistent marginal maximum likelihood estimators based on marginal maximum likelihood estimators of the reduced form parameters for the probit and tobit models in contrast the estimator derived from smith and blundell 1986 is based on the corresponding conditional maximum likelihood estimators this paper is concerned with estimation in a class of simultaneous limited dependent variable regression models which includes the simultaneous probit and tobit models as special cases analogous marginal and conditional maximum likelihood estimators to those of nelson and olsen 1978 amemiya 1978 1979 heckman 1978 and smith and blundell 1986 are derived and other new estimators are suggested the minimum chi squared approach discussed by ferguson 1958 malinvaud 1970 and rothenberg 1973 is used to compare the asymptotic relative efficiency of various estimators considered a simple two step algorithm based on the conditional maximum likelihood

endogeneity in semiparametric binary response models this paper develops and implements semiparametric methods for estimating binary response binary choice models with continuous endogenous regressors it extends existing results on semiparametric estimation in single index binary response models to the case of endogenous regressors it develops a control function approach to account for endogeneity in triangular and fully simulataneous binary response models the proposed estimation method is applied to estimate the income effect in a labor market participation problem using a large micro data set from the british fes the semiparametric estimator is found to perform well detecting a significant attenuation bias the proposed estimator is contrasted to the corresponding probit and linear probability specifications jel c14 c25 c35 j22

improving the efficiency of probit estimators the efficiency with which coefficients in probit mod els are estimated is improved by exploiting data on continuous ancillary variates in this paper the resulting gains in efficiency are examined and illustrative calculations are provided extra precision is achieved at the cost of making an extra assumption but this assumption can be tested it is shown that fully efficient maximum likelihood estimation of the probit model with a continuous ancillary variate can be achieved by a simple two step procedure involving an ordinary least squares and a probit estimation

the determinants of price in 3g spectrum auctions this article examined the empirical relationship between prices paid for national 3g wireless licenses when spectrums were sold by auction the reduced form modelling approach was based on the prem

unobserved investment endogenous quality and trade a seller can make investments that affect a tradable asset s future returns the potential buyer of the asset cannot observe the seller s investment prior to trade nor does he receive any signal of it nor can he verify it in anyway after trade despite this severe moral hazard problem this paper shows the seller will invest with positive probability in equilibrium and that trade will occur with positive probability the outcome of the game is sensitive to the distribution of bargaining power between the parties with a holdup problem existing if the buyer has the bargaining power a consequence of the holdup problem is surplus reducing distortions in investment level perhaps counterintuitively in many situations this distortion involves an increase in the expected amount invested vis a vis the situation without holdup

temporary migration human capital and language fluency of migrants this paper investigates human capital investment of immigrants whose duration in the host country is limited either by contract or by their own choice the first part of the paper develops a model which distinguishes between temporary migrations where the return time is exogenous or optimally chosen the analysis has a number of interesting implications for empirical work some of which are explored in the second part of the paper the analysis focuses on language capital and tests the hypothesis that country specific human capital investments are sensitive to the duration in the host country s labour market the results show that the acquisition of language capital is sensitive to the intended duration in the host country

nonparametric estimation of exact consumers surplus and deadweight loss we apply nonparametric regression models to estimation of demand curves of the type most often used in applied research from the demand curve estimators we derive estimates of exact consumers surplus and deadweight loss which are the most widely used welfare and economic efficiency measures in areas of economics such as public finance we also develop tests of the symmetry and downward sloping properties of compensated demand we work out asymptotic normal sampling theory for kernel and series nonparametric estimators as well as for the parametric case the paper includes an application to gasoline demand empirical questions of interest here are the shape of the demand curve and the average magnitude of welfare loss from a tax on gasoline in this application we compare parametric and nonparametric estimates of the demand curve calculate exact and approximate measures of consumers surplus and deadweight loss and give standard error estimates we also analyze the sensitivity of the welfare measures to components of nonparametric regression estimators such as the number of terms in a series approximation

the effect of development aid unpredictability and migrants remittances on fiscal consolidation in developing countries summary we use panel data on 74 developing countries for the period 1980 2007 to examine the effects of aid unpredictability and migrants remittances on fiscal consolidation in these countries using two definitions of fiscal adjustment and a conditional logit model to perform our analysis evidence is shown that except for the case of low income countries especially gradual fiscal retrenchment remittances increase the likelihood of fiscal consolidation be the latter gradual or rapid surprisingly we observe that aid unpredictability does not affect the adoption of fiscal consolidation measures in all the groups considered

the location of markets perceived entrepreneurial risk and start up capital of micro rural firms it is argued that when founders of smes perceive the probability of a successful and lucrative venture to be greater they are more likely to provide a greater proportion of the start up capital this paper provides an empirical examination of two concurrent hypotheses firstly that the size of the debt or equity is affected by factors influencing perceived entrepreneurial risk secondly that the location of the market for the firm s output is a major factor reducing perceived entrepreneurial risk and increasing equity of the start up capital a statistical analysis based on the simultaneous tobit model is used results show that significant factors influencing risk perception include the size of the new business and the sector of economic activity as well as entrepreneurial experience and the location of the markets for the firm s output the results highlight implications for the design and implementation of rural development policies and especially for the instruments supporting rural business creation

an exogeneity test for a simultaneous equation tobit model with an application to labor supply a test of weak exogeneity in the simultaneous equation tobit model is proposed and illustrated using a female labour supply model estimated using cross section data the test statistic can be simply output from any standard tobit maximum likelihood package and is asymptotically efficient the procedure provides consistent estimators for the simultaneous tobit model whose asymptotic covariance matrix is a simple extension of the usual tobit formula we also provide the lagrange multiplier test of weak exogeneity this abstract was borrowed from another version of this item