theory and behavior of multiple unit discriminative auctions this paper reports the results of controlled experiments designed to test the harrisraviv generalization of the vickrey theory of bidding in multiple unit discriminative auctions the paper also discusses further development of the theory in a way suggested by the experimental results to include bidders with distinct risk preferences in a well known paper vickrey 20 formulated a nash equilibrium model of bidding by risk neutral economic agents in single unit auctions this analysis was subsequently extended in numerous papers vickrey 21 generalized his original model to include multiple unit auctions in which each of n risk neutral bidders can bid on one out of a total of q homogeneous items up for auction where 1 c q n in both of the vickrey papers individual values for the auctioned object s were assumed to be drawn from a uniform distribution holt 12 and riley and samuelson 19 for single unit auctions and harris and raviv 11 for multiple unit auctions have extended the vickrey model to the case in which valuations are from a general distribution function and all agents have identical concave utility functions this paper reports the empirical properties of individual bidding behavior and seller revenue for a group of 28 laboratory experiments designed to test the harris raviv generalization of the vickrey hereafter vhr model of nash equilibrium behavior in multiple unit discriminative auctions in section i we summarize briefly the theoretical results of the vhr model which form the basis for the hypotheses that we test section ii describes the experimental design that we use section iii describes the experimental results and various tests based on the bidding behavior of individual subjects and on aggregate market seller revenue data the results from six of the ten n q parameter designs reported

price distortions in agriculture and their effects an international comparison the central thesis of this paper is that agricultural pricing policies pursued by developing countries produce effects which are diametrically opposite to those produced by the pricing policies of many developed countries and that the policies of both are costly in terms of global welfare in general the agricultural sector in developing countries is heavily taxed while that in the developed countries receives substantial price protection the effects of agricultural price distortions on output consumption trade and rural employment are estimated for nine countries in addition the effects of price distortions on the distribution of income between producers and consumers on government revenue and foreign exchange and the net social losses of the policies are calculated the results indicate that there are large income transfers and impacts on migration from the rural to the urban sector in developing countries and from the urban to the rural sector in developed economies

the distribution of earnings in an equilibrium search model with state dependent offers and counteroffers we construct an equilibrium job search model with on the job search in which firms implement optimal wage strategies under full information in the sense that they leave no rent to their employees and counter the offers received by their employees from competing firms productivity dispersion across firms results in wage mobility both within and across firms workers may accept wage cuts to move to firms offering higher future wage prospects equilibrium productivity dispersion across ex ante homogeneous firms can be endogenously generated productivity dispersion then generates a nontrivial wage distribution which is generically thin tailed as typically observed in the data

when strong ties are strong networks and youth labour market entry the conditions under which young workers find their first real post graduation jobs are important for their future careers and insufficiently documented given their potential importance for young workers welfare to study these conditions and in particular the role played by social ties we use a swedish population wide linked employer employee data set of graduates from all levels of schooling that includes detailed information on family ties neighbourhoods schools class composition and parents and children s employers over a period covering years with both high and low unemployment together with measures of firm performance we find that strong social ties parents are an important determinant for where young workers find their first job the effects are larger if the graduate s position is weak low education bad grades during high unemployment years and when information on potential openings are likely to be scarce on the hiring side by contrast the effects are larger if the parent s position is strong long tenure high wage and if the parent s plant is more productive the youths appear to benefit from the use of strong social ties through faster access to jobs and by better labour market outcomes as measured a few years after entry in particular workers finding their entry jobs through strong social ties are considerably more likely to remain in this job while experiencing better wage growth than other entrants in the same plant firms also appear to benefit from these wage costs relative to comparable entrants starting at a lower base they also benefit on the parents side parents wage growth drops dramatically exactly at the entry of one of their children in the plant although this is a moment when firm profits tend to be growing indeed the firm side benefits appear large enough for at least small firms to increase job creation at the entry level in years when a child of one of their employees graduates

an on the job search model of crime inequality and unemployment we extend simple search models of crime unemployment and inequality to incorporate on the job search this is valuable because although simple models are useful on the job search models are more interesting theoretically and more relevant empirically we characterize the wage distribution unemployment rate and crime rate theoretically and use quantitative methods to illustrate key results for example we find that increasing the unemployment insurance replacement rate from 53 to 65 percent increases unemployment and crime rates from 10 and 2 7 percent to 14 and 5 2 percent we show multiple equilibria arise for some fairly reasonable parameters in one case unemployment can be 6 or 23 percent and crime 0 or 10 percent depending on the equilibrium

street crime and street culture a model shows how reputation concerns can support widespread street crime a street culture where the direct incentives for such behavior are weak there are social benefits to street reputations but those benefits are dominated when reputation concerns draw into crime those who obtain no direct gain from it the model matches facts about violent crime that a standard model cannot easily explain including low monetary returns disproportionate victimization of the young and poor and high variance in rates across small distances the model generates novel implications for policy and social science including a negative effect of social capital

optimal production with learning by doing abstract this paper characterizes optimal production over time when production cost is a decreasing function of past accumulated output when production exhibits learning by doing monopolistic competitive and socially optimal solutions are considered

urban poverty and juvenile crime evidence from a randomized housing mobility experiment this paper uses data from a randomized housing mobility experiment to study the effects of relocating families from high to low poverty neighborhoods on juvenile crime outcome measures come from juvenile arrest records taken from government administrative data our e ndings seem to suggest that providing families with the opportunity to move to lower poverty neighborhoods reduces violent criminal behavior by teens

divergence in alternative hicksian welfare measures the case of revealed preference for public amenities this paper investigates the divergence between the two hicksian welfare measures of non traded amenity improvement associated with housing first the hicksian surplus measures for amenity changes are analytically developed based on explicit specification of utility structures a hedonic two stage approach is then applied to empirically show that for quantity changes in contrast to hypothetical markets divergence in real market is small the paper also analytically develops expressions for the income and substitution effects and empirically shows that for a given income effect the greater the substitution effect the smaller the divergence between the two measures copyright 2002 john wiley sons ltd

application of sample selection model to double bounded dichotomous choice contingent valuation studies modeling households behavior with the data from a contingentvaluation cv survey is often complicated by samplenon response which can cause non response bias and sampleselection bias leading to inconsistent parameter estimates and adistorted mean willingness to pay estimate this paper reportsthe results of empirical tests for both biases using householdsurvey data in which the double bounded dichotomous choice cvquestion involved the benefit of a tap water quality improvementpolicy in korea no non response bias but sample selection bias is detected in the sample to correct for sample selection bias a sample selection model is employed the authors also discusshow failure to correct for bias may distort aggregate benefitestimates

local social capital and geographical mobility in the north of europe club membership is higher than in the south but the frequency of contacts with friends relatives and neighbors is lower we link this fact to another one the low geographical mobility rates in the south of europe relative to the north to interpret these facts we build a model of local social capital and mobility investing in local ties is rational when workers do not expect to move to another region we find that observationally close individuals may take different paths characterized by high local social capital low mobility and high unemployment vs low social capital high propensity to move and higher employment probability employment protection reinforces the accumulation of local social capital and thus reduces mobility european data supports the theory within a country and at the individual level more social capital is associated with lower mobility

dynamic entry reverse auctions and the purchase of environmental services this research uses economic experiments to examine the effectiveness of reverse auction institutions in an endogenous dynamic entry setting induced values are used to compare behavior in dynamic and static auction structures past research on this topic has understudied dynamic elements such as strategic entry and endogenous bidder selection that arise in a dynamic environment the results suggest complex behavioral patterns in which some sellers overenter early and others strategically wait this affects the owners abilities to extract rents in a dynamic setting this result impacts policy effectiveness because previous work overlooking these dynamic elements likely understates auction cost effectiveness

agglomeration city size and crime this paper analyzes the relationship between crime and agglomeration where the land labor product and crime markets are endogenously determined our main theoretical findings are the following i better accessibility to jobs decreases crime in the short run but may increase crime in the long run ii the per capita crime rate increases with city size iii when allowing for endogenous policing lower commuting costs make the impact of police on crime more efficient

when does public information undermine the efficiency of reverse auctions for the purchase of ecosystem services abstract government agencies that conduct reverse auctions related to the payment of ecosystem services pes traditionally provide a significant amount of public information about past auction results this information includes not only the amount of money spent by the government but also can include various information about the accepted bids this research uses induced value experiments to evaluate the effect of past auction information on seller landholder rent seeking results suggest that sellers use this public information and learn how to secure higher rents however when sellers are given information only about the buyer s government agency s budget they secure lower rents results also suggest that relative budget size affects rents and that budget stochastic variability in the presence of market information diminishes the effect thus in the presence of public information and equivalent total outlays variable budgets are more likely than stationary budgets to achieve auction fiscal efficiency the measure of whether the auction achieves the greatest pes benefits given its limited budget finally this research finds that auctions with greater heterogeneity in seller opportunity costs are likely to be less fiscally efficient than when the distribution is more homogeneous

consumer s surplus versus compensating variation revisited consumer s surplus and a second order approximation to compensating variation are compared to the exact compensating variation for a subsystem of several commodities an empirical application to the relative retail price distortions created by the u s dairy program is presented in the application a new specification for weakly integrable incomplete demand models is developed and estimated the integrable demand model has sufficient flexibility that it is not rejected by the data both welfare approximations are found to introduce large errors in the measurement of deadweight losses

what accounts for the decline in crime in this article we analyze recent trends in aggregate property crime rates in the united states we propose a dynamic equilibrium model that guides our quantitative investigation of the major determinants of observed patterns of crime our main findings can be summarized as follows first the model is capable of reproducing the drop in crime between 1980 and 1996 second the most important factors that account for the observed decline in property crime are the higher apprehension probability the stronger economy and the aging of the population third the effect of unemployment on crime is negligible fourth the increased inequality prevented an even larger decline in crime overall our analysis can account for the behavior of the time series of property crime rates over the past quarter century

assessing the performance of conservation auctions an experimental study this work uses controlled laboratory experiments to investigate the budgetary and the economic performance of competitive tenders for allocating conservation contracts to landholders experiments have been replicated in two different countries to check for robustness of results we find that auctions outperform the more traditional fixed price programs only in the one shot setting with repetition the auctions quickly lose their edge the budget constrained auction performs similarly to the target constrained in the one shot setting but appears more robust to repetition our results suggest that previous estimates of conservation auction performance are too optimistic and we propose a method for improving such estimates

surplus maximization and optimality i identify assumptions under which policies that maximize expected surplus are pareto optimal even when expected consumer surplus does not even locally represent preferences over price income lotteries besides the oft made partial equilibrium assumptions that only one price varies and that income changes do not aect demand the two other assumptions are that every consumer s indirect utility function is supermodular in price and income and policies order prices by a single crossing property supermodularity holds precisely if relative risk aversion exceeds the income elasticity of demand a mild condition the single crossing property appears strong but holds in many applications that use expected surplus

public and private returns from joint venture research an example from agriculture public research institutions are turning increasingly to the private sector for additional financial support such a trend in the short run lessens the need for public research expenditures but may in the long run prove to be very costly to the economy as a whole this is because private funding increases the chance that the direction of research will shift so that private benefits are enhanced such a shift is especially costly if public research funds are then not forthcoming that would have the potential of producing the maximum level of benefits to the economy as a whole a case study of canadian barley research is used to illustrate this problem

health insurance tradeoffs revisited abstract in two recent papers journal of health economics 18 2 141 152 journal of health economics 18 6 811 824 nyman raised some questions about the welfare calculations and conclusions in our earlier paper manning and marquis health insurance the tradeoff between risk pooling and moral hazard vol 15 1996 this note discusses the erroneous criticisms in his papers first although we estimated a marshallian demand curve our calculations are based on compensating variations that incorporate the gains from risk pooling second our estimates of second best insurance plans indicate that some cost sharing is optimal in contradiction to his assertion that our results raise questions about the desirability of insurance coverage the comment also deals with other issues raised by nyman

environmental issues and economic decisions in developing countries abstract this paper explains the key role of environmental economics in incorporating environmental concerns into decision making and in facilitating the more efficient management of natural resources as a step toward sustainable development it reviews concepts and techniques for valuation of environmental impacts for use in conventional cost benefits analysis as well as key related aspects including environmental impacts of economywide policies multicriteria analysis risk and uncertainty and discount rate issues several developing country case studies are summarized which cover a range of practical valuation methods the evidence presented suggests that the valuation techniques for determining use values may be applied successfully in appropriate cases but examples involving nonuse values are rare the use of multiobjective desicion methods also needs to be explored where economic valuation is not feasible

the economic benefits of surface water quality improvements in developing countries a case study of davao philippines two nonmarket valuation techniques the contingent valuation method and travel cost model are used to estimate the economic value that people in davao philippines place on improving the water quality of the rivers and sea near their community the contingent valuation and travel cost estimates are very close to each other and are quite low both in absolute terms and as a percentage of household income these findings suggest that water pollution control is simply not a high priority for davao s residents and support the argument that households willingness to pay for environmental amenities such as improved water quality is low

crime and social interactions the high variance of crime rates across time and space is one of the oldest puzzles in the social sciences this variance appears too high to be explained by changes in the exogenous costs and benefits of crime we present a model where social interactions create enough covariance across individuals to explain the high cross city variance of crime rates this model provides an index of social interactions which suggests that the amount of social interactions is highest in petty crimes moderate in more serious crimes and almost negligible in murder and rape

job information networks neighborhood effects and inequality this paper explores the theoretical and empirical literature to examine the use by different social groups of informal sources of information provided by friends relatives and acquaintances during job search and its consequences for the job market it also addresses the role of network structure and size the resource endowments of contacts and nature of the links between contacts to explain differences in the effects of job information networks in doing so the paper also turns to the sociology literature on job information networks and provides an economic perspective on such sociological concepts as strong versus weak ties inbreeding distance from structural holes etc the paper distinguishes between models of exogenous job information networks that is where individuals obtain job related information through a given social structure and endogenous job information networks which are social networks that result from individuals uncoordinated actions the paper pays special attention to such issues as physical and social proximity and sharing of information and discusses them in the context of the recent social interactions and neighborhood effects literature finally the paper outlines a model that integrates job information networks where interactions occur in business cycle frequencies with the dynamics of human capital formation which include the joint effects of parental community and neighborhood human capital and are set in life cycle frequencies for the purpose of organizing suggestions for future research and examining earned income inequality

nutritional functional classification study of panama abstract despite significant progress wide spread malnutrition persists in panama this article describes a study which found that over half the malnutrition in the country is clustered in functional groups economically connected to the agricultural sector and which indicates that food availability is a serious problem for 25 of the population food intake deficits were equally prevalent among the urban and rural populations dietary composition was not seen as the principal problem rather malnutrition problems are linked to low wages and poor access to public services a nutrition policy for panama must be centred first on employment and income generation and then on extending and maintaining public health and nutrition services particularly for the extremely poor in the central provinces food policy per se would not seem a priority area for public intervention

on the political economy of income redistribution and crime this article analyzes a general equilibrium model in which agents choose to specialize in either legitimate or criminal activities expenditures on police to apprehend criminals as well as income redistribution are determined endogenously through majority voting we investigate how crime redistribution and police expenditures depend on characteristics of the underlying distribution of income earning abilities and on the apprehension technology our model accounts for the positive correlation between inequality and crime the positive correlation between expenditures on police and redistribution and the lack of correlation between crime and redistribution observed in u s data

evaluating conservation auctions with unknown bidder costs the scottish fishing vessel decommissioning program as an alternative to the more traditional fixed price schemes governments can run auctions to purchase environmental services from private agents governments have so far chosen the discriminatory price dp over the uniform price up format theoretical and experimental studies have concluded that the dp usually performs better than the up in terms of cost effectiveness using field data from two fishing vessel decommissioning auctions in scotland we find ambiguous results regarding relative dp and up performances a novel approach for estimating the underlying bidder costs shows that bid shading and cost heterogeneity can each determine relative auction performance jel q22 q28

compensating variation consumer s surplus and welfare the compensating variation was defined by j r hicks 1942 as the amount one would have to deduct from a person s income to make him just as well off after a change in prices and income as he had been in the initial situation if the compensating variation is positive the individual is better off under the new situation since the compensating variation furnishes a uniquely defined numerical cardinal indicator of welfare improvement it provides an implicit ranking of alternative prospective situations not only relative to the initial situation but also relative to each other in practice this appears to be how this and other tools of cost benefit analysis are actually used one is interested in knowing not only whether a particular bridge or a particular excise tax will lead to an improvement in welfare but which out of a set of alternative bridges or alternative tax systems will improve welfare the most 1 in this paper we analyze conditions under which the compensating variation can be validly used in this generalized sense these turn out to be precisely the same as conditions previously derived see our 1976 paper for the valid use of consumer s surplus as a welfare measure in our final section we analyze the problem of deriving the generalized equivalent and compensating variations either exactly or approximately from observable demand functions by means of generalizations of or alternatives to consumer s surplus

welfare implications of community forest plantations in developing countries the orissa social forestry project community forest plantations are a common intervention in developing countries we use household and remote sensing data from orissa india to estimate welfare effects of community forest plantations in terms of the value of decreased collection times plantations afford users a selection model accounting for possible jointness in site location and productivity is used to estimate collection production functions for different household labor categories in natural and community forests two measures of an opportunity cost of time are used to determine welfare effects of time saved due to community forests we find access to community forests is important to marginal productivity of different labor categories but to different degrees highlighting the need to disaggregate household data when analyzing these interventions we also find substantial welfare improvements from time savings for many households and villages

what do income tests tell us about the gap between wta and wtp for public goods abstract theory relates the gap between wta willingness to accept compensation and wtp willingness to pay to the income elasticity of wtp it has been suggested that empirical estimates of the income elasticity of wtp can therefore be used to test whether an observed gap between wta and wtp is consistent with rational behavior we examine this issue for the case of non market public goods we identify the theoretically appropriate tests of income sensitivity and examine conditions for valid income sensitivity tests we show that income tests may provide false signals in common settings indicating an inconsistency where none exists

bootstrapping in applied welfare analysis bootstrapping procedures are used to estimate the statistical properties of common empirical welfare measures results from a monte carlo experiment indicate that welfare estimates such as marshallian consumer surplus often exhibit significant bias standard errors of welfare estimates are found to often exceed the magnitude of the point estimate for typical cross section data sets and are generally larger than the difference between comparable hicksian and marshallian measures precision of welfare estimates can be markedly enhanced through generating larger data sets obtaining better model fits and through imposition of innocuous inequality restrictions on the demand function parameters

does social capital reduce crime abstract we investigate the effects of civic norms and associational networks on crime rates civic norms may attach guilt and shame to criminal behavior thus increasing its opportunity cost associational networks may increase returns to noncriminal activities and raise detection probabilities but they may also work as communication channels for criminals and may offer official cover to criminal activities the empirical assessment of these effects poses serious problems of endogeneity omitted variables measurement error and spatial correlation italy s great variance in social and economic characteristics its homogeneity in policies and institutions and the availability of historical data on social capital in its regions allow us to minimize the first two problems to tackle the last two problems we use report rate adjusted crime rates and estimate a spatial lag model we find that both civic norms and associational networks have a negative and significant effect on property crimes across italia

welfare measurement in the household production framework the household production approach to consumer behavior developed from the work of gary becker william gorman and kelvin lancaster has considerable descriptive appeal in modelling the decisions of households the approach derives from the observation that households frequently purchase market goods that do not yield utility directly but are combined to produce commodity service flows which the household values thus observed behavior is determined by household production technology as well as by tastes the advantage of this distinction is that we can pose reasonable hypotheses about characteristics of technology though we rarely possess useful a priori information regarding tastes the putative advantages of the household production approach are questioned on empirical and conceptual grounds by robert pollak and michael wachter 1975 they show that jointness in production or nonconstant returns to scale cause implicit commodity prices to depend on both tastes and technology raising serious econometric difficulties in the estimation of commodity demand functions in addition since commodity prices become functions of the commodity bundle consumed the analogy to traditional demand theory breaks down joint production occurs when a good enters several production processes simultaneously or equivalently when a good in one production process also enters directly into the individual s utility function the most common example is time which provides the context for all production processes and is often associated with the production of several commodities simultaneously since joint production in the household is likely to be pervasive the critique by pollak and wachter cannot be ignored in response to the comment by william barnett pollak and wachter 1977 suggest dispensing with the notion of commodity prices and treating the demand for commodities as a function of goods prices this approach confounds tastes and technology but it eliminates the troublesome concept of commodity prices as parameters when in fact they are likely to be endogenous in this paper we show that results from positive analysis such as the critique by pollak and wachter have implications for the use of the household production framework for welfare analysis the household production function approach has had considerable appeal for measuring welfare effects of public actions in the environmental and natural resource areas gardner brown john charbonneau and michael hay elizabeth wilman yet traditional approaches to welfare measurement are frequently inapplicable we argue that welfare measurement in this framework is complicated by the difficulties of unravelling tastes and technology we extend pollak and wachter s results by demonstrating that marshallian demand functions for commodities cannot be uniquely defined thus marshallian functions cannot be used to derive exact compensated functions in the manner of jerry hausman and of george mckenzie and i f pearce nor can compensating and equivalent variation measures be bounded by marshallian consumer s surplus estimates following robert willig in fact duality results that normally allow us to move between marshallian and hicksian functions are not assistant and associate professors respectively department of agricultural and resource economics university of maryland college park md 20742 this paper is scientific article no a3404 contribution no 6476 of the maryland agricultural experiment station we wish to thank darrell hueth james opaluch v kerry smith and elizabeth wilman for comments on an earlier draft

identifying the effect of unemployment on crime abstract in this paper we analyze the relationship between unemployment and crime using u s state data we estimate the effect of unemployment on the rates of seven felony offenses we control extensively for state level demographic and economic factors and estimate specifications that include state specific time trends state effects and year effects in addition we use prime defense contracts and a state specific measure of exposure to oil shocks as instruments for unemployment rates we find significantly positive effects of unemployment on property crime rates that are stable across model specifications our estimates suggest that a substantial portion of the decline in property crime rates during the 1990s is attributable to the decline in the unemployment rate the evidence for violent crime is considerably weaker however a closer analysis of the violent crime of rape yields some evidence that the employment prospects of males are weakly related to state rape rates

contingent valuation techniques for assessing environmental impacts further evidence abstract this paper provides further evidence on the development and application of the iterative bidding technique used to assess environmental impacts three specific issues the hypothetical nature of the survey technique the questionnaire information structure and the bidding procedure starting point are examined theoretically and empirically to determine their effect on individual bid behavior the empirical results indicate that the importance of these influences may have been overstated in earlier studies

axiomatic foundations of hicksian measures of welfare change abstract the aggregate hicksian measures i ev i and i cv i are characterized by three simple properties one property concerns the ranking of two states the measures are paretian a second property expresses the postulate that welfare changes are to be evaluated in money the third one deals with redistributions of incomes distributional considerations are taken into account by employing variable distributional weights i

a laboratory comparison of uniform and discriminative price auctions for reducing non point source pollution auctions allow regulators to identify land management changes with substantial environmental benefit and low opportunity cost this paper reports an experiment in which seller subjects compete in sealed offer auctions to obtain part of a fixed budget allocated by the experimenter regulator to subsidize pollution abatement one treatment employs uniform price auction rules whereas another treatment employs discriminative price auction rules we find that most offers in the uniform price auction are within 2 of cost whereas most offers in the discriminative price auction are at least 8 greater than cost nevertheless the discriminativeprice auction has superior overall market performance

on measuring the value of a nonmarket good using market data we use line integral theory to lay out in a more general theoretical framework the conditions under which it is possible to measure with market data the welfare effects of a change in a nonmarket good we present in detail a numerical method of measuring the value of nonmarket goods using market data under either weak neutrality or weak complementarity our numerical method is more flexible than the existing analytical method because it can be used with any well behaved marshallian demand function and can be used even when the willig condition does not hold

a structural model of crime and inequality in colombia economic theory suggests that inequality should influence crime positively yet the evidence in favor of that hypothesis is weak pure cross sectional analyses show significant positive effects but cannot control for fixed effects time series and panel data point to a variety of results but few turn out being significant the hypothesis maintained in this paper is that it is a specific part of the distribution rather than the overall distribution as summarized by conventional inequality measures that is most likely to influence the rate of property crime in a given society using a simple theoretical model and panel data in seven colombian cities over a fifteen year period a structural model is proposed that permits identifying the precise segment of the population whose relative income best explains time changes in crime jel k42 d63 o15

markets and the measurement of value consumer s surplus and the hicksian measures of compensating and equivalent variation have a long history in empirical economic analysis however at both the theoretical and the empirical level economists psychologists and public choice theorists have not been able to reach a significant consensus regarding the usefulness of these measures economic theorists have only recently dissected the differences which exist between alternative welfare measures in a systematic and transparent fashion in willig 1976 hausman 1981 and takayama 1984 the role of income in determining the correct theoretical measurements of compensating and equivalent variations was exposed during this same period of time theoretical results obtained by the psychologists kahneman and tversky 1979 indicated that the fundamental structure of preferences upon which the theoretical economic results are based is flawed the so called prospect theory of decision developed by these authors indicated that measured of welfare based upon payment will differ from measures of welfare based upon compensation because of the fact that individuals will value losses at a greater marginal rate than gains this difference was then predicted to dominate any income effect important in the economist s model finally this period recorded the emergence of many demand revealing processes which provide individuals with appropriate incentives to accurately reveal their preferences as summarized in coursey and schulze 1986 one interpretation of the literature on incentive compatibility suggests a set of well defined guidelines for improving both the accuracy and validity of compensating and equivalent variation measures these differences in professional preferences regarding what is important in improving the accuracy of economic welfare measurements led john

crime inequality and unemployment there is much discussion of the relationships between crime inequality and unemployment we construct a model where all three are endogenous we find that introducing crime into otherwise standard models of labor markets has several interesting implications for example it can lead to wage inequality among homogeneous workers also it can generate multiple equilibria in natural but previously unexplored ways hence two identical neighborhoods can end up with different levels of crime inequality and unemployment we discuss the effects of anti crime policies like changing jail sentences as well as more traditional labor market policies like changing unemployment insurance this abstract was borrowed from another version of this item

welfare losses due to market power hicksian versus marshallian measurement this paper warns against the use of marshallian welfare loss in applied analysis of market power we show how to compute the hicksian deadweight loss from an ordinary demand then from an experiment using real data on twenty one sectors of the french food industry we find that the marshallian deadweight loss poorly approximates the exact hicksian measure hence it is advisable to use the latter in applied welfare analysis copyright 2001 oxford university press

intergenerational correlation and social interactions in education we propose a dynastic model where individuals are born into an educated or uneducated environment that they inherit from their parents we study the impact of social interactions on the correlation in parent child educational status independently of any parent child interaction when the level of social interactions is decided by a social planner we show that the correlation in education status between generations decreases very fast as social interactions increase in turn when the level of social interactions is decided by the individuals themselves we show that the intergenerational correlation still decreases although less rapidly than with exogenous social interactions

what marshall didn t know on the twentieth century s contributions to economics some of this century s many valuable contributions to economics like macroeconomics econometrics and game theory are widely recognized however arguably equally important is the enhanced role of empirical study permitted by more abundant data and improved methods also insufficiently recognized are the increased rigor and use of applied economics in public finance regulation corporation finance etc employing abstract theory and sophisticated data analysis the striking contrast with earlier intuitively based applied economics and empirical study is illustrated comparison with marshall s principles also indicates that except for macroeconomics remarkably little space in today s texts deals with some of the rich contributions of this century what has twentieth century economics accomplished a great deal as will be shown here but the discussion needs an illuminating starting point in 1946 after arriving at the london school of economics as an entering graduate student 1 i soon found that in

search for a theory of organized crimes abstract casual empirical observations reveal no systematic relationship between the overall crime rate and organized criminal activity we develop a search theoretic framework to study the interactions not only between formal labor and crime sectors but also between individual and organized crimes in equilibrium individual and organized criminals face different arrest risks success rates reward structures and outside options we characterize agents occupational choices the gang s hierarchical structure and the responses of unemployment crime rates and crime composition to changes in labor market conditions and crime deterrence policies we further assess the effectiveness of arrest versus punishment policies in deterring individual and organized crimes

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

public monopoly and economic efficiency evidence from the pennsylvania liquor control board s entry decisions we estimate a spatial model of liquor demand to analyze the impact of government controlled retailing on entry patterns in the absence of the pennsylvania liquor control board the state would have roughly 2 5 times the current number of stores higher consumer surplus and lower payments to liquor store employees with just over half the number of stores that would maximize welfare the government system is instead best rationalized as profit maximization with profit sharing government operation mitigates but does not eliminate free entry s bias against rural consumers we find only limited evidence of political influence on entry jel d42 d72 l11 l12 l43 l81

strong and weak ties in employment and crime this paper analyzes the interplay between social structure and information exchange in two competing activities crime and labor we consider a dynamic model in which individuals belong to mutually exclusive two person groups referred to as dyads there are multiple equilibria if jobs are badly paid and or crime is profitable unemployment benefits have to be low enough to prevent workers for staying too long in the unemployment status because they are vulnerable to crime activities if instead jobs are well paid and or crime is not profitable unemployment benefits have to be high enough to induce workers to stay unemployed rather to commit crime because they are less vulnerable to crime activities also in segregated neighborhoods characterized by high interactions between peers a policy only based on punishment and arrest will not be efficient in reducing crime it has to be accompanied by other types of policies that take into account social interactions

consumer s surplus without apology the purpose of this paper is to settle the controversy surrounding consumer s surplus and by so doing to validate its use as a tool of welfare economics i will show that observed consumer s surplus can be rigorously utilized to estimate the unobservable compensating and equivalent variations the correct theoretical measures of the welfare impact of changes in prices and income on an individual i derive precise upper and lower bounds on the percentage errors of approximating the compensating and equivalent variations with consumer s surplus these bounds can be explicitly calculated from observable demand data and it is clear that in most applications the error of approximation will be very small in fact the error will often be overshadowed by the errors involved in estimating the demand curve the results in no way depend upon arguments about the constancy of the marginal utility of income consequently this paper supplies specific empirical criteria which can replace the apologetic caveats frequently employed by those who presently apply consumer s surplus moreover the results imply that consumer s surplus is usually a very good approximation to the appropriate welfare measures to preview below i establish the validity of these rules of thumb for a

crime and economic incentives we explore the role that economic incentives particularly changes in wages at the bottom end of the wage distribution play in determining crime rates we use data on the police force areas of england and wales between 1975 and 1996 and find relative falls in the wages of low wage workers lead to increases in crime we carry out a number of experiments with different wage measures including a wage measure that accounts for the effects of changes in the composition of employment these reinforce the picture of a strong association between the low wage labor market and crime the result that incentives play a central role is reinforced further by the strong impact on crime of deterrence measures and of a measure of the returns to crime

how urbanization affect employment and social interactions we develop a model where the unemployed workers in the city can find a job either directly or through weak or strong ties we show that in denser areas individuals choose to interact with more people and meet more random encounters weak ties than in sparsely populated areas we also demonstrate that for a low urbanization level there is a unique steady state equilibrium where workers do not interact with weak ties while for a high level of urbanization there is a unique steady state equilibrium with full social interactions we show that these equilibria are usually not socially efficient when the urban population has an intermediate size because there are too few social interactions compared to the social optimum finally even when social interactions are optimal we show that there is over urbanization in equilibrium

approximating compensated income from ordinary demand functions abstract this paper proposes a re versible s econd or der t aylor resort approximation to compensated income from ordinary demand functions resort yields the malmquist vartia m v algorithm as a first order case using the slutsky equation resort obtains the substitution matrix and checks it for symmetry and negative semi definiteness to validate compensated income this validation procedure is an improvement over m v

the cost effectiveness of conservation payments international donors invest billions of dollars to conserve ecosystems in low income nations the most common investments aim to encourage commercial activities such as ecotourism that indirectly generate ecosystem protection as a joint product we demonstrate that paying for ecosystem protection directly can be far more cost effective although direct payment initiatives have imposing institutional requirements we argue that all conservation initiatives face similar challenges thus conservation practitioners would be well advised to implement the first best direct payment approach rather than a secondbest policy option an empirical example illustrates the spectacular cost savings that can be realized by direct payment initiatives

the effects of social networks on employment and inequality we develop a model where agents obtain information about job opportunities through an explicitly modeled network of social contacts we show that employment is positively correlated across time and agents moreover unemployment exhibits duration dependence the probability of obtaining a job decreases in the length of time that an agent has been unemployed finally we examine inequality between two groups if staying in the labor market is costly and one group starts with a worse employment status then that group s drop out rate will be higher and their employment prospects will be persistently below that of the other group

spatial versus social mismatch the aim of this paper is to provide a new mechanism based on social interactions explaining why distance to jobs can have a negative impact on workers labor market outcomes especially ethnic minorities building on granovetter s idea that weak ties are superior to strong ties for providing support in getting a job we develop a model in which workers who live far away from jobs choose to have less connections to weak ties because of the lack of good public transportation in the us it is costly both in terms of time and money to commute to business centers to meet other types of people who can provide other source of information about jobs if distant minority workers mainly rely on their strong ties who are more likely to be unemployed there is then little chance for them of escaping unemployment it is therefore the separation in both the social and physical space that prevents ethnic minorities from finding a job

a dynamic model of weak and strong ties in the labor market the study develops a simple model where workers can obtain a job through either their strong or weak ties it shows that increasing the time spent with weak ties raises the employment rate of workers it also shows that when the job destruction rate or the job information rate increases workers choose to rely more on their weak ties to find a job the model is extended so unemployed workers can also learn of a vacancy directly from an employer results show that equilibrium employment and time spent with weak ties are sometimes but not in all cases positively related

despairing over disparities explaining the difference between willingness to pay and willingness to accept this paper examines the three major explanations for the disparity between willingness to pay wtp and willingness to accept wta observed in contingent value surveys and laboratory experiments a belief that the results must be biased in some fashion hanemann s 1991 substitutes hypothesis and the loss aversion model proposed by tversky and kahneman 1991 starting from the assumption that individuals make utility maximizing choices we develop structural equations that yield parametric tests of the hypotheses within a single non experimental framework the approach is flexible enough to incorporate a variety of functional form and distributional assumptions and can be applied to either data from either open ended bids or dichotomous choice questions the usefulness of the approach is demonstrated using data from a survey that asked both wtp and wta questions the results provide weak support for loss aversion

analysing rationing policies drought and its effects on urban users welfare analysing rationing policies during drought the aim of this paper is to study the impact on consumers of rationing policies implemented during water shortages water scarcity gives rise to the need for rationing and various methods including supply cutoffs can be used a model is devised to quantify the welfare losses associated with qualitive and quantitive restrictions based on virtual prices and using the consumer surplus as a welfare measurement welfare variations for different users have been calculated to achieve the aim information relative to seville spain has been used analysing the drought period that took place in the first half of the 1990s it has been possible to observe the main source that led to welfare losses for each kind of user

neighborhood effects on crime for female and male youth evidence from a randomized housing voucher experiment the moving to opportunity mto demonstration assigned housing vouchers via random lottery to public housing residents in five cities we use the exogenous variation in residential locations generated by mto to estimate neighborhood effects on youth crime and delinquency the offer to relocate to lower poverty areas reduces arrests among female youth for violent and property crimes relative to a control group for males the offer to relocate reduces arrests for violent crime at least in the short run but increases problem behaviors and property crime arrests the gender difference in treatment effects seems to reflect differences in how male and female youths from disadvantaged backgrounds adapt and respond to similar new neighborhood environments

a protectionist foodgrain price policy the case of rice in panama abstract panama has pursued a protectionist price policy for rice with domestic prices well above the world market level the government marketing authority purchases sufficient rice to support the established price level and stores or exports the surplus although producers benefit this policy imposes significant costs on consumers government expenditures and economic efficiency one policy recommendation is to bring domestic prices in line with the international level although free trade is one possibility a market stabilization programme could be retained at a minimum panama s rice price should reflect domestic demand and not production costs the unfavourable rice fertilizer price ratio also deserves attention

thieves thugs and neighborhood poverty abstract this paper develops a model of crime analyzing how such behavior is associated with individual and neighborhood poverty the model shows that even under relatively minimal assumptions a connection between individual poverty and both property and violent crimes will arise and moreover neighborhood effects can develop but will differ substantially in nature across crime types a key implication is that greater economic segregation in a city should have no effect or a negative effect on property crime but a positive effect on violent crime using iv methods i show this implication to be consistent with the empirical evidence

agri environmental policies in the eu and united states a comparison abstract agri environmental policies aeps in the united states and the european union are examples of payments for environmental services that pay farmers to reduce the negative externalities of agricultural production while serving as a means to transfer public funds to farmers we show that despite similar origins aeps in the two regions differ both in their specific objectives and in their implementation for example aeps in most member states of the eu 15 have the additional objective of using agriculture as a driver for rural development this objective is achieved by compensating farmers for the private delivery of positive public goods such as attractive landscapes produced by agriculture the rationale is market failure and there is empirical evidence that europeans are willing to pay for such positive externalities no comparable provision exists in u s policy by contrast u s aeps focus almost entirely on reducing agriculture s negative externalities such as soil erosion second we find that u s programs are more targeted than their eu counterparts and take opportunity cost into account the eu programs on the other hand address a wider range of externalities and are focused more on the paying for a particular farming process than reducing specific negative externalities the eu takes a broader view of aeps than does the united states both in terms of type of activity that can be funded and by using less targeting by land characteristics and so the european program could be more easily used as a mechanism for transferring income to producers despite this we find evidence that many of the amenities targeted by the programs are demanded by the population

a review article the case against the use of the sum of compensating variations in cost benefit analysis this paper presents a case against the use of the sum of compensating varia tions as a cost benefit test we argue that 1 the ethical judginents implied by the test are not defensible 2 positive sums of compensating variations occur without potential pareto improvements resulting in social preference reversals without simultaneous scitovsky re versals 3 when lump sum transfers are feasible a positive sum of compensating variations is necessary but not sufficient for a potential pareto improvement 4 in order to eliminate preference reversals and intransitivities all households must have almost identical quasi homothetic preferences a condition that is not satisfied in real economies