resolving differences in willingness to pay and willingness to accept reply gwendolyn c morrison 1997 raises a logical point regarding our experimental test of the divergence between willingness to pay wtp and willingness to accept wta measures of economic value shogren et al 1994 she argues that our design does not provide a true test of the existence of a fundamental endowment effect since we did not control for the potential of a pivoting indifference map daniel kahneman et al 1990 she concludes that even though our ev idence shows that the mean wtp and wta bids for market goods with close substitutes e g candy bars and coffee mugs converge after market experience the endowment effect might still be alive and well albeit at statisti cally insignificant levels

paired comparison and contingent valuation approaches to morbidity risk valuation abstract this research uses an experimental approach for eliciting consumer valuations of morbidity risk reductions associated with safter chemical products and introduces the paired comparison questions approach to non market valuation in four applications the paired comparisons approach yields higher morbidity valuations than the more familiar contingent valuation approach however both methodologies produce large values of morbidity reduction benefits in comparison to estimates derived from wage hedonic studies explanations for the difference in the estimates and their magnitudes are suggested along with the public policy implications

estimating the public good value of preserving a local historic landmark the role of non substitutability and citizen information this study applies stated preference methods to estimate the public good values of preservation and restoration of a local historic landmark in a medium sized us city the survey device centres on

use value of cultural experiences a comparison of contingent valuation and travel cost abstract few applications to assess the value of cultural experiences exist this is particularly frustrating for cultural institutions as it provides them with few opportunities to reveal their importance in terms of attractiveness and thus what drives tourism demand this study applies the travel cost method tcm and contingent valuation method cvm to assess the value of two rural cultural institutions in order to compare the results of the valuation methods the results reveal that visitor experiences consist of a core cultural experience as well as other valuable experiences before and after whereas cvm allows for a valuation of the core cultural experience separately from other experiences the tcm is limited to an overall assessment the tcm is therefore an inappropriate measure of the value of the cultural experiences when the total experience includes several other experiences if visitors travel for the sake of only one cultural experience tcm may be preferable due to its simple applicability and cost efficiency if however as is most often the case a cultural experience is part of a bundle of experiences the application of cvm is recommendable this is also the case if only visitors who state the cultural experience to be the primary reason for travelling are included

does work pay in france monetary incentives hours constraints and the guaranteed minimum income abstract this paper uses a representative sample of individuals on france s main welfare program the revenu minimum d insertion or rmi to estimate monetary incentives for employment among welfare recipients based on the estimated joint distribution of wages and hours potentially offered to each individual we compute potential gains from working in a very detailed manner relating these gains to observed employment we then estimate a simple structural labor supply model we find that potential gains are almost always positive but very small on average especially for single mothers because of the high implicit marginal tax rates embedded in the system employment rates are sensitive to incentives with extensive margin elasticities for both men and women usually below one conditional on these elasticities simulations indicate that existing policies devoted to reducing marginal tax rates at the bottom of the income distribution such as the interessement earnings top up program have little impact in this population due to their very limited scope the negative income tax prime pour l emploi seems to be an exception

sampling variability some observations from a labour supply equation in economics the number of observations available for empirical work is often predetermined researchers assume some large sample distribution and carry through with measurement and testing applied to data sets of varying sizes the consequences of sampling variability are generally ignored it is shown in a re sampling experiment using data sets of different sizes and estimating log linear male labour supply equations that a wide range of what appears to be statistically supported estimates of the wage elasticity of labour supply are generated testing based on bootstrapped estimates shows that 4000 observations are required to reduce sampling variability to statistically acceptable levels

a satisfactory benefit cost indicator from contingent valuation abstract standard economic concepts are used to develop a model of individual behavior when subject to the constraints of the contingent valuation choice context the model yields refutable consequences that are consistent with previously reported empirical findings including some that have been thought to be anomalous the model is used to show that different contingent valuation formats have predictably different performance characteristics notably the hicksian compensating measures are satisfactory benefit cost indicators when elicited using any one of several formats identified in the text of the formats examined one form of a policy referendum appears to have the most satisfactory characteristics overall we conclude that contingent valuation is a progressing research program

fairness spillovers the case of taxation abstract it is standardly assumed that individuals react to perceived unfairness or norm violations in precisely the same area or relationship where the original offense has occurred however grievances over being exposed to injustice may have even broader consequences and also spill over to other contexts causing non compliant behavior there we present evidence that such fairness spillovers can incur large economic costs a belief that there is unfairness in taxation in the sense that the rich do not pay enough taxes is associated with a twenty percent higher level of paid absenteeism from work

convergence or convenience international conservation ngos and development assistance in tanzania abstract international conservation ngos and development agencies have historically operated independently of one another recently their agendas have converged to consider both environmental and human needs with an emerging focus on private sector involvement in conservation new funding from international finance institutions has become available for ngo initiatives and today there is little difference between the environmental strategies of international development agencies and those of the major conservation ngos operating in tanzania while this is due in part to independent shifts in both sectors ngos may also be serving to carry out and legitimate the neoliberal policies of development institutions

application of stochastic choice modeling to policy analysis of public goods a case study of air quality improvements this paper demonstrates the applicability of the stochastic choice method in performing policy analysis of changes in public goods using survey data the air quality problem studied involves air pollution control for the tampa bay area of florida and relatively simple choices between changes in a public good and disposable income it illustrates the use of surveys as a public forum in which preferences are revealed 26 references 2 tables

confidence intervals for evaluating benefits estimates from dichotomous choice contingent valuation studies i evaluate the potential usefulness of nonmarket valuation concepts and techniques from environmental economics for improving wildlife conservation the concepts include distinguishing between on site recreation use value and off site passive use or

the effects of information on willingness to pay values of endangered species the contingent valuation method cvm has been employed in several research studies to measure the economic value of environmental commodities brookshire kramer and mercer loehman park and boldt lohr battard and bath the use of cvm allows for flexibility and for application to a wide range of environmental amenities not only those that can be measured in conjunction with some marketable goods however because of its hypothetical character the validity of cvm is often disputed a structural element that might have an especially strong influence on cvm valuation is the contingent market information structure bergstorm stoll and randall information content and presentation in contingent markets are controlled by the researcher the design of an information structure can influence a participant s cognitive valuation process and in turn final revealed valuations information is thus conceptualized as an input into the cognitive decision process of which stated valuations are the final result the role of information in a contingent valuation methodology is extremely important because it conveys the knowledge of an environmental issue with which the respondent will assimilate and base value judgment on this research study proposes that information disclosure can influence an individuals reported willingness to pay wtp values for the preservation of an endangered species the means by which information is disclosed by the researcher is critical in the valuation process new information disclosed about an ecological good might affect the wtp behavi r of the individuals kula

tied wage hours offers and the endogeneity of wages in the standard model of labor supply each worker is a price taker where the relevant price is an hourly wage rate which is fixed in the short run and which does not depend upon the number of hours supplied with this basic assumption the wage can be regarded as exogenous for the purpose of estimating a labor supply function this paper proposes and implements a pair of tests for the exogeneity of wages in a longitudinal labor supply model and for the particular failure of exogeneity associated with jobs that offer wage hour packages the first test is very simple it amounts to a test of whether hours granger cause wages at the individual level the second test involves a simultaneous estimation of labor supply and wage offer equations both tests indicate that the offered wage is related to hours worked though the offer locus is for this sample very flat the principal conclusion is that labor supply equations cannot properly be estimated in isolation from the process generating wages even when long time series are available on a sample of individuals this abstract was borrowed from another version of this item

fixed costs and hours constraints hours constraints are typically identified by worker responses to questions asking whether they would prefer a job with more hours and more pay or fewer hours and less pay because jobs with different hours but the same rate of pay may be infeasible when there are fixed costs of employment or mandatory overtime premia the constraint in those cases may be illusory cross section estimates of reported hours constraints are consistent with this model implying that the overall level of hours constraints may exaggerate the extent to which the labor market is characterized by frictions and imperfections

female labor supply with a discontinuous nonconvex budget constraint incorporation of a part time full time wage differential this paper incorporates the well documented part time full time wage differential into an empirical labor supply model with both a heterogeneity and a random error term and estimates that model fo

why was there mandatory retirement abstract lazear argues that hours constraints and mandatory retirement form part of an efficient contract which inhibits worker shirking he argues that initially workers earn less than their vmp and must work more than they want while later they earn more than their vmp and must work less however if bonding is costly incentive compatibility requires that workers can never exceed the contracted hours in addition hours will be set so that vmp exceeds the disutility of employment consequently being paid more than their vmp is only sufficient not necessary for workers to be constrained to work less than they wish

choice among wage hours packages an empirical investigation of male labor supply this article specifies and estimates an empirical model of male labor supply based on an implicit market model of wage hours determination we discuss how moving from a standard labor supply model to an implicit market model affects model specification and choice of estimation technique we find that average hourly earnings are not independent of hours worked and that ols estimates of the wage hours relationship are biased we also show that a labor supply model that assumes wages to be independent of hours worked produces a positively biased estimate of the effect of the wage on labor supply

a theory of dual labor markets with application to industrial policy discrimination and keynesian unemployment this paper develops a model of dual labor markets based on employers need to motivate workers in order to elicit effort from their workers employers may find it optimal to pay more than the going wage this changes fundamentally the character of labor markets the model is applied to a wide range of labor market phenomena it provides a coherent framework for understanding the claims of industrial policy advocates it also can provide the basis for a theory of occupational segregation and discrimination that will not be eroded by market forces finally the model provides the basis for a theory of involuntary unemployment

willingness to pay and willingness to accept how much can they differ comment i agree with the point made by edoh y amiran and daniel a hagen 2003 that there can be a substantial or even infinite divergence between the wta and wtp for a public good even where there is a nonzero elasticity of substitution between market goods and the public good provided that the indifference curves are asymptotically bounded with respect to market goods in the manner they describe this is an important point they are also correct to point out that the elasticity of substitution is a local concept whereas their asymptotic boundedness condition applies also for discrete changes my 1991 paper used a local analysis because it was following the structure of the analysis in robert d willig 1976 and alan randall and john r stoll 1980 i wanted to show that while randall and stoll appeared to extend willig s local result on wta versus wtp from price changes to changes in the quantity of a public good the relevant elasticity was in fact different and involved the substitution elasticity as well as the income elasticity i view these points by amiran and hagen as not two separate results but essentially the same result their asymptotic boundedness condition generalizes my zero elasticity of substitution condition to discrete changes the asymptotic boundedness condition can be expressed as follows assuming a bivariate utility function u x q and given a reference point x q associated with a reference utility level u u x q there exists some q q such that for all q q there exists no x such that u x q u in other words no amount of x can substitute for the reduction in public good from q to q q in the case of a zero elasticity of substitution q q but as amiran and hagen show in their theorem 1 this is unnecessarily restrictive when dealing with a discrete reduction in q furthermore their theorem 2 can be viewed as a special case of their theorem 1 in which q 0 which makes q an essential commodity it is well known in consumer theory that the wta to avoid the loss of an essential market good is infinite their theorem 2 extends this result to the case of an essential nonmarket good but as their theorem 1 shows essentialness is not necessary for an infinite wta the boundedness condition is the key and this implies a fundamental lack of substitutability between money market goods and the public good

the impact of information on environmental commodity valuation decisions a conceptual model is developed which provides insight into how information affects willingness to pay for environmental commodities a refutable hypothesis of the effects of a specific information type on the magnitude of willingness to pay for an environmental commodity is developed this hypothesis is tested using a contingent valuation method experiment results indicate that information affects willingness to pay in a theoretically plausible manner the results support the contention that information is important for accurate environmental commodity consumer valuations

intertemporal substitution and constraints on labor supply evidence from panel data intertemporal substitution and constraints on labor supply evidence from panel data i introduction through much of the 1970s and 1980s macroeconomic stabilization analysis has been dominated by equilibrium models in which fluctuations in employment result from intertemporal substitution workers voluntarily vary their labor supply over time in response to movements in wages and interest rates a number of recent empirical tests of intertemporal substitution models for example altonji 1982 mankiw et al 1985 ham 1986 strongly reject the intertemporal substitution approach these results have led some economists to reject equilibrium macro models in favor of keynesian models in which workers face quantity constraints on labor supply in keynesian models employment fluctuations result from changes in the severity of constraints that is changes in involuntary unemployment rather than intertemporal substitution on the other hand many economists remain unconvinced by recent rejections of intertemporal substitution models because the results are consistent with many possible explanations for tractability empirical studies always impose restrictive assumptions such as separability of utility over time and between goods or such as the existence of a representative consumer data also suffer from numerous problems such as aggregation bias measurement error and the use of average rather than marginal wage rates consequently even the authors of the studies seem hesitant to draw firm conclusions they often simply conclude that workers behavior is explained either by quantity constraints or by a more complicated intertemporal substitution model than the one they have tested 1 this paper attempts to determine which of these explanations is correct are changes in employment a sophisticated form of intertemporal substitution or are they involuntary the crucial data come from questions in the panel study of income dynamics about whether workers experience unemployment or are unable to work as many hours as they want following ham 1982 1986 this information is used to classify workers as quantity constrained in their labor supply or unconstrained i then test a simple intertemporal substitution model for each group of workers if the tests suffer from overly restrictive utility functions or data problems then the model should be rejected for both samples on the other hand if some workers truly face quantity constraints then the model should perform better for the sample of unconstrained workers 2 the tests yield two main results first the model indeed performs worse for the constrained workers for this group the data reject the model s overidentifying restrictions and the parameter estimates contradict the model in contrast the results for the unconstrained workers are weakly consistent with the model as keynesian theories suggest quantity constraints alter workers behavior second the estimates of the intertemporal labor supply elasticity for prime age men are close to zero even for unconstrained workers even if workers are free to vary their hours they apparently choose to respond little to movements in wages the paper addresses two other issues first do constraints on borrowing influence labor supply in the intertemporal substitution model workers borrow and lend to smooth consumption while varying hours of work as this suggests the model performs best for workers who not only face no labor supply constraints but who also own substantial assets and thus are unlikely to face liquidity constraints finally the paper proposes a new approach to identifying intertemporal labor supply equations previous micro studies do not adequately address the problem that wages are correlated with unobservable characteristics that affect tastes for work i propose two identifying restrictions 1 changes in tastes are uncorrelated with levels of time in variant variables and 2 changes in tastes have no aggregate component

paired comparison estimates of willingness to accept versus contingent valuation estimates of willingness to pay estimating empirical measures of an individual s willingness to accept that are consistent with conventional economic theory has proven difficult the method of paired comparison offers a promising approach to estimate willingness to accept this method involves having individuals make binary choices between receiving a particular good or a sum of money willingness to accept can be inferred from the ranking of dollar amounts and the good of interest using the paired comparison approach mean median willingness to accept for a private good is estimated at 59 52 contingent valuation estimate of willingness to pay for the same good yields a mean median of 28 28 while these estimates are statistically different the ratio of willingness to accept to willingness to pay is less than in most previous studies and closer to ratios found in actual cash experiments

commodity specification and the framing of contingent valuation questions contingent valuation studies comprise a process of information transfer a researcher through a survey instrument conveys information about the item being valued and repondents in turn provide information about the value they place on this item considering contingent valuation from this perspective nearly all of the research evaluating the validity of this valuation method is in a general sense focused on examining the effects of information structures on value estimates a comparison of various questioning techniques represents such an examination boyle and bishop 1988 randall hoehn and tolley 1981 smith desvousges and fisher 1986 on a more specific level the selection of a payment vehicle also forms part of the information set and may affect statements of value greenley walsh and young 1982 1985 mitchell and carson 1985 these examples suggest that the validity of estimated contingent values relies heavily on the information conveyed to survey respondents since varying information structures can affect the magnitude of estimated values

economic valuation by the method of paired comparison with emphasis on evaluation of the transitivity axiom the paired comparison pc method is used to investigate reliability transitiv ity and decision time for binary choices among goods and sums of money the pc method reveals inconsistent choices and yields individual prefer ence order over the set of items being compared the data reported support the transitivity as sumption and demonstrate high reliability for individual preference order the paper also discusses using the pc method to obtain conser vative median and mean estimates of willingness to accept compensation for public and private goods the pc method may prove useful for valu ing public goods and warrants further study jel 426

constraints on the choice of work hours agency versus specific capital lifetime contracts imply that at a given time wages and value of marginal product vmp will diverge the contract will specify hours as well as wages since firms will desire to prevent workers from working more when the wage is greater than vmp and from working less when the wage is less than vmp if hours are set efficiently workers will face binding hours constraints the agency model and the firm specific capital models make opposite predictions regarding the relation between work hours constraints and job tenure we test these predictions our results indicate that neither model explains the observed pattern of hours constraints

information bias in contingent valuation effects of personal relevance quality of information and motivational orientation abstract a laboratory experiment examined the potential for information bias in contingent valuation cv consistent with the view that information about a public or private good can function as a persuasive communication willingness to pay wtp was found to increase with the quality of arguments used to describe the good especially under conditions of high personal relevance under low personal relevance wtp for a public but not for a private good was higher when an altruistic as opposed to an individualistic orientation was activated it is concluded that the nature of the information provided in cv surveys can profoundly affect wtp estimates and that subtle contextual cues can seriously bias these estimates under conditions of low personal relevance

hours restrictions and labor supply the authors estimate a labor supply model that permits hours restrictions of a simple but general form each individual chooses from among a finite set of jobs drawn at random f rom a market distribution each offering a fixed quantity of hours the polar cases of no constraints on hours worked and exogenous hours ar e nested within the general case the authors results are consistent with a substantial amount of rationing in the work hours of a sample of low income men most of whom are working less than they would like copyright 1993 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

estimation of a labour supply model with censoring due to unemployment and underemployment this study proposes and implements a method of labour supply estimation which is appropriate when the sample contains unemployed and underemployed workers the estimation method consists of excluding unemployed and underemployed workers from the sample and then using to avoid selection bias an extension of heckman s approach to the case where two correlated selection rules generate the sample hausman s specification test is then used to determine whether ignoring constrained workers has led to biases in traditional labour supply estimates and the empirical results suggest that previous estimates of several important parameters are biased since the biases go in the direction that would be predicted by the hypothesis that the unemployed and underemployed are constrained the results support this hypothesis

the effects of hours constraints on labor supply estimates almost all labor supply models are estimated under the assumption that workers are free to choose their hours however theory casual empiricism and survey data suggest that many workers are not free to vary the hours within a job consequently labor supply estimates based on actual hours of work may be biased using canadian data on desired hours of work the authors find that using actual hours causes labor supply estimates to be biased upwards copyright 1991 by mit press