optimal auction with resale this paper investigates the design of seller optimal auctions when winning bidders can attempt to resell the good in that case the optimal allocation characterized by myerson 1981 cannot be achieved without resale i find a sufficient and necessary condition for sincere bidding given the possibility of resale in two bidder cases i prove that the myerson allocation can be achieved under standard conditions supplemented with two assumptions with three or more bidders achieving the myerson allocation is more difficult i prove that it can be implemented in special cases in those cases the myerson allocation is generated through a sequence of resale auctions each optimally chosen by a reseller

first price auctions with resale abstract we present a simple model of first price auction with two bidders whose valuations are not identically distributed and where resale is possible between the bidders and given an explicit expression for the equilibrium strategies

widows waiting to wed re marriage and economic incentives in social security widow benefits in this paper we focus on an age restriction for remarriage in the social security system to determine if individuals respond to economic incentives for marriage aged widow er benefits are paid by the federal government to persons whose deceased spouses worked in social security covered employment a widow er is eligible to receive benefits if she or he is at least age 60 if a widow er remarries before age 60 he or she forfeits the benefit and therefore faces a marriage penalty under current law there is no penalty if the remarriage occurs at 60 years of age or later we investigate whether this rule affects the marriage behavior of widows specifically we examine the rates of remarriage of women around age 60 under current as well as past social security eligibility rules using data from the vital statistics our results provide compelling evidence that this group of women respond to economic incentives when considering the decision to remarry first the 1979 law change that eliminated the marriage penalty for those at least age 60 resulted in a large increase in the marriage rate for widows at

policy watch the marriage penalty many government programs have implicit penalties or subsidies for marriage for example many couples pay higher income taxes when married than their combined tax liabilities as single filers while many other couples receive a marriage subsidy because their joint taxes fall with marriage likewise most low income couples are eligible for higher welfare benefits if they are separated rather than married this article discusses the marriage penalty with a particular focus on tax and transfer programs why does it exist who faces it to what extent does it affect marriage and labor market behavior what tradeoffs are involved in reducing it

social approval values and afdc a re examination of the illegitimacy debate this paper models the fertility decision of individuals who differ in their wage rate and their intensity of preferences for rearing children and whose utility of having a child out of wedlock depends on the level of social approval associated with doing so this social approval in turn is a function of the fraction of individuals in previous generations that chose to have children out of wedlock the model is a straightforward extension of the typical rational choice model that motivates much of the empirical literature a literature that has cast doubt on a strong link between afdc and illegitimacy however the model introduces elements from epidemic models that many have in mind when arguing for such a link as a result the predictions of this extended model are consistent with empirical findings while at the same time linking the rise in illegitimacy solely to government welfare programs specifically a program similar to afdc is introduced into an economy with low illegitimacy rates and a trans

optimal mechanisms for an auction mediator we consider a multi period auction with a seller who has a single object for sale a large population of potential buyers and a mediator of the trade the seller and every buyer have independent private values of the object the mediator designs an auction mechanism which maximizes her revenue subject to certain constraints for the traders in each period the seller auctions the object to a set of buyers drawn at random from the population the seller can re auction the object infinitely many times if it is not sold in previous interactions we characterize the class of mediator optimal auction mechanisms one of such mechanisms is a vickrey auction with a reserve price where the seller pays to the mediator a fixed percentage from the closing price

the effect of old age assistance on retirement abstract researchers have devoted considerable attention to analyzing the impact of social security on retirement with mixed findings however the means tested program old age assistance oaa dwarfed social security until the 1950s and coincided with the early decline in elderly labor force participation also oaa benefits were determined by the states a key source of policy variation i estimate the relationship between oaa benefits and elderly participation using individual data from the 1940 and 1950 censuses oaa s impact is found to be strong and implies that participation would have risen slightly instead of falling if benefits had not increased during the 1940s

evaluating the uncertainty in estimates of the economic impacts of bovine leukosis virus in u s dairy cows an examination of the economic impacts of bovine leukosis virus indicated that reduced milk production attributed to the presence of bovine leukosis virus in dairy cows reduced consumer surplus by 2 7 2 3 billion us bus and resulted in a total partial equilibrium loss of 720 560 million us mus to the u s economy in 1996 most of the economic surplus lost by consumers was transferred to producers whose economic surplus increased by 2 0 1 8 bus as a result of reduced milk production attributed to the presence of bovine leukosis virus in dairy cattle uncertainty analysis showed that an estimate of the milk production decline per percent increase in the prevalence of bovine leukosis virus in dairy cows accounted for most of the uncertainty in the economic impact estimates if bovine leukosis virus had not been present in u s dairy cows then milk production would have increased by 2 0 billion 1 5 billion kg the price would have fallen by 3 8 3 2 cents kg and the value of the milk produced would have decreased by 2 1 1 9 bus guidelines delineated by the international organization for standardization for evaluating and expressing uncertainty in measurement are discussed and proposed for use in the context of broad national estimates for which the economic impacts of bovine leukosis virus serve as an example the principal advantages of the methodology are the clarity and transparency of results and the ability clearly to identify major uncertainty contributors

welfare benefits and female headship in u s time series whether welfare benefits affect marriage and fertility decisions of the low income population has been the subject of much research the substantial bias in the u s welfare system toward female headed families relative to either married couples or single childless individuals provides a clear financial incentive for early nonmarital childbearing postponement of marriage divorce postponement of remarriage and other behaviors that make eligibility for welfare benefits more likely or that avoid the loss of eligibility after it has been achieved the findings in the cross sectional research literature through 1995 summarized in moffitt 1998 exhibit a clear central tendency pointing toward an effect of welfare on some aspects of family structure namely marriage and fertility however there is also agreement that the time series evidence is inconsistent with that from crosssectional data for real benefits have been falling for over 20 years while female headship has been rising moreover bringing other programs such as food stamps and medicaid into the picture helps explain rising female headship increases in the late 1960 s and early 1970 s when those programs were introduced and solidified but does less well in explaining the

cross state variation in medicaid programs and female labor supply john c navin using a pooled cross section data set from the 1980 through 1993 current population survey march supplements we test if different medicaid benefit levels across states impact the labor supply behavior of female heads of households the ordinary least square ols results support the prediction that medicaid expenditures reduce labor supply controlling for state fixed or random effects alters the effect of both afdc and medicaid on the decision to participate as well as the number of hours worked we also find that while the effects of program generosity are sensitive to the inclusion of state effects those of variation in eligibility thresholds are not jel j22 i introduction the issue of the design and effects of government policies aimed at providing support for children is at the center of an ongoing national debate social scientists policy makers and the public at large have all focused their attention on the benefits and perhaps even more so the costs to society of this support network these costs are perceived to take not just monetary forms but also to have adverse incentive effects in terms of work out of wedlock births divorce etc much of this debate has focused on the adverse effects of the cash components of welfare aid for families with dependent children afdc and food stamps but recently other programs have become embroiled in this debate as the costs of health care have risen government provided medicaid benefits have also come under increasing scrutiny medicaid expenditures are one of the fastest rising components of state budgets state medicaid spending rose by 80 in real terms between 1980 and 1990 rising from 19 1 billion to 33 7 billion further state medicaid expenditures increased even more dramatically in the past few years rising about 19 in 1990 91 and 22 5 in 1991 92 up until the mid 1980s medicaid coverage was primarily limited to recipients of afdc and indigent senior citizens over the last ten years however medicaid coverage has been altered to include individuals with incomes above the afdc maximum primarily pregnant women or children whose parents have incomes at or slightly above the poverty line despite the fact that medicaid is a federally mandated program there is a large amount of latitude as to the number and types of individuals and services that each state can choose to cover this state freedom implies that there are basically 51 different medicaid programs in the united states washington d c also participates in medicaid because of this there is a large variance in per recipient medicaid expenditures across states in 1992 for example annual per recipient medicaid expenditures for afdc adults ranged from a high of 2 937 in louisiana to a low of 575 in mississippi 1 recently economists and other social scientists have used the cross state variation in these programs as a form of natural experiment that allows them to access the effectiveness and adverse incentive effects of these programs in this article we use this approach to add to the literature on the effects of these programs on labor supply first we construct three new measures of the value of medicaid benefits to adults children and families which vary across states and time these alternate measures will allow us to test for the sensitivity of the conclusions from previous studies to the measure of medicaid value used previous work on medicaid and female labor supply has used measures of state level medicaid spending which included spending on the elderly and disabled since these groups account for a substantial share of all medicaid expenditures and they are not randomly distributed across states this has the potential to bias the reported results second because there is substantial variation acr oss states in their labor market characteristics demographic mixes and other factors which are potentially correlated with both labor supply and benefit generosity our analysis checks for the sensitivity of the results to the inclusion of state fixed and random effects

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

price changes supply elasticities industry organization and dairy output distribution long run price elasticities of milk supply are decomposed into price elasticities of yield herd size and farm population for northeastern u s dairy farms these elasticities are shown to vary with farm size because of size related differences in capital intensity specialization yield and herd size variability and rates of entry exit into dairy in the short run price responsiveness is shown to decrease with farm size in the long run large farms are shown to be most price responsive results suggest that lower milk prices could make revenue distribution less equal in both the short and long run by altering output and population distributions

standard auctions with financially constrained bidders we develop a methodology for analyzing the revenue and efficiency performance of auctions when buyers have private information about their willingness to pay and ability to pay we then apply the framework to scenarios involving standard auction mechanisms in the simplest case where bidders face absolute spending limits first price auctions yield higher expected revenue and social surplus than second price auctions the revenue dominance of first price auctions over secondprice auctions carries over to the case where bidders have access to credit these rankings are explained by differences in the extent to which financial constraints bind in different auction formats

for love or money the impact of income taxes on marriage higher sometimes lower than their combined single income tax obligations in this paper we explore the impact of the federal individual income tax as well as other economic and demograplhic variables on the marriage decisionis of individuals using longitudinal data from the panel study on income dynamics for the period 1968 92 we estimate a discrete time hazard model of the time to first marriage we find that the probability of marriage is significantly affected by a range of economic and demographic variables importantly we find that an increase in total income taxes paid by married versus single women has a negative effect on the likelihood of marriage and that the change in the marginal tax rate is also a significant determinant of marriage in some cases in contrast the tax effects are rarely significant in determining marriage probabilities among men although there are some differential responses by race in general the impacts of the income tax variables even when statistically significant are small

on the determination of occupational attainment and mobility the underlying motivation for much of the research into the determinants of occupational attainment is to enable inferences to be made as to the relative position of various groups at a point in time or an individual s economic mobility over time in this paper we compare unordered and ordered discrete choice approaches to estimating models of occupational attainment estimates from these methods differ substantially indicating that the determination of which technique is more appropriate is an important issue the ordered method appears to be more consistent with the motivation of previous research and requires less computer time unordered models however are better able to predict occupational distribution

optimal bidding in auctions from a game theory perspective abstract the game theoretic perspective in auction bidding has provided a powerful normative framework for the analysis of auctions and it has generated an impressive volume of research contributions tracing this research we review key recent advances which have greatly expanded our understanding of the operation of auctions and produced a more accurate analysis of mechanism design and optimal bidding we follow various experimental studies which have shown that the predictive power of auction theory remains in many cases limited for this reason we concentrate on research themes which enhance the applicability of auction theory leading to more realistic descriptions of bidding behaviors we identify important innovations which expand the environment of auction bidding and carry us beyond rational decision making we conclude providing directions of future research and discussing their implications

medicaid afdc and family formation this paper uses the fact that states joined the medicaid programme at different times between early 1966 and early 1970 to estimate the effect of health insurance availability on childbearing and marital choice data on women aged 15 to 45 during the 1964 to 1972 period from the march current population survey cps is used to estimate medicaid s effect on the probability that a woman has recently given birth and is not married it is found that the introduction of medicaid led to a small but statistically significant increase in the probability that a woman is single and has recently given birth specifically the introduction of medicaid led to a 0 3 percentage point increase in the probability that a woman is a single mother of young children this is an approximately 10 increase relative to the average fraction of single mothers in the sample of about 3 although nonwhite women are on average more likely to be single mothers than white women are it is found that medicaid did not significantly contr

are ols estimates of the return to schooling biased downward another look the authors examine evidence on bias in ols estimates of the economic return to schooling to study omitted ability bias they use test scores available in the national longitudinal survey of youth as proxies for ability allowing for measurement error in these test scores the authors also explore biases from the endogeneity of schooling or experience or measurement error in these variables in their data ols estimation including test scores appears to be appropriate and indicates an upward bias of roughly 40 percent in the ols estimate ignoring ability this contrasts with evidence from other recent research using different statistical experiments to purge schooling of its correlation with the wage equation error copyright 1995 by mit press

partial pooling at the reserve price in auctions with resale opportunities abstract two features common to many auctions are the use of reserve prices and the existence of secondary markets for the goods being sold even in simple symmetric settings the combination of these features can preclude existence of an equilibrium in symmetric separating bidding strategies with a reserve price sufficiently far below the maximum endogenous valuation a symmetric equilibrium still exists but with some types pooling at the reserve the optimal reserve price depends not only on the joint distribution of bidders information before and after the auction but also on how surplus is divided in the secondary market journal of economic literature classification numbers d44 c7 l1 d82

are disadvanteged bidders doomed in ascending auctions a bidder is said to be advantaged if she has a higher expected valuation of the auction prize than her competitor when the prize has a common value component a bidder competing in an ascending auction against an advantaged competitor bids especially cautiously and hence the advantaged bidder wins most of the time however contrary to what is often argued a disadvantaged bidder still wins with positive probability even if his competitor s advantage is very large and even if the disadvantaged bidder has the lowest actual valuation ex post therefore the disadvantaged bidder has an incentive to participate in the auction and the presence of a bidder with a small advantage does not have a dramatic effect on the seller s revenue

marriage divorce and reciprocity based cooperation this paper considers partnership formation partnership dissolution and reciprocity based cooperation by couples in the form of voluntary transfers to smooth consumption while risk sharing is one benefit of having a partner it is also limited by the endogenous risk of separation the equilibrium formation and dissolution of partnerships are determined simultaneously with cooperative behavior publicly provided earnings insurance is shown to increase the turnover rate in the marriage market as well as to reduce the steady state marriage rate and the implicit financial cooperation between partners

the effects of welfare vehicle asset rules on vehicle assets before 1996 households were typically ineligible for welfare if they had assets worth more than 1000 where 1500 from each vehicle s value was excluded from this determination however the 1996 welfare reform act began allowing states to increase their asset limits and vehicle exclusions this may prompt low income households to reallocate resources to or from vehicles we examine the effects of state vehicle asset rules on vehicle assets results show that liberalizing asset rules increases vehicle assets and that this increase is driven largely by eligible individuals increasing vehicle assets with no evidence indicating that ineligible individuals reduce vehicle assets to become eligible

cash welfare as a consumption smoothing mechanism for divorced mothers abstract while there has been considerable research on the disincentive effects of cash welfare under the aid to families with dependent children afdc program there is little evidence on the benefits of the program for single mothers and their children one potential benefit of this program is that it provides short run consumption insurance for women at the point that they become single mothers this is only true however to the extent that the program is not crowding out other sources of support such as own savings labor supply or transfers from others i assess the importance of this insurance mechanism by measuring the extent to which afdc smooths the consumption of women who transition to single motherhood through marital dissolution i use longitudinal data on family structure and consumption expenditures on food and housing from the panel study of income dynamics psid matched to information on the welfare benefits available in each state and year over the 1968 1985 period i find that raising potential benefits by one dollar raises the food and housing consumption of women who get divorced and their families by 28 cents this estimate implies that for each dollar of afdc received by this population their consumption of these categories of goods rises by up to 51 cents this is roughly the share of food and housing in the consumption bundle of divorced mothers and their families suggesting little crowdout of other sources of support

does welfare play any role in female headship decisions abstract previous studies have examined whether the welfare system has contributed to the dramatic increase in single parent families this paper explores why the results in this literature are sensitive to the presence of state fixed effects it considers one natural explanation namely that the composition of the population differs across states in ways that are related to welfare program generosity after controlling for individual effects the results provide no evidence that welfare raises the propensity to form female headed households for either whites or blacks these results illustrate the potential pitfalls of assuming that state factors are fixed over a long period of time they also suggest that previous studies may have overstated the effect of welfare programs on family structure

is there an effect of incremental welfare benefits on fertility behavior a look at the family cap this analysis exploits the variation across states in the timing of policy implementation to determine if family cap policies lead to a reduction in births to women aged 15 to 34 vital statistics birth data for the years 1989 to 1998 offer no such evidence the data reject a decline in births of more than one percent the finding is robust to multiple specification checks the data also reject large declines in higher order births among demographic groups with high welfare participation rates

a structural model of multiple welfare program participation and labor supply work on estimating the labor supply effects of high marginal tax rates in welfare programs has been hindered by the difficulty of estimating the effects of participation in multiple welfare programs simultaneously the authors solve this problem by applying methods of simulation estimation to a model of labor supply and multiple program participation the results show asymmetric wage and tax rate effects with fairly large wage elasticities of labor supply but very inelastic responses to moderate changes in cumulative marginal tax rates implying that high welfare tax rates do not necessarily induce major reductions in work effort copyright 1998 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

the american welfare system and family structure an historical perspective cross sectional studies find a positive relationship between a state s welfare benefits and single motherhood but is this evidence of a welfare effect or rather of cross state differences in social attitudes that influence both policy and behavior this paper demonstrates that the spatial variation in welfare policy long preceded the spatial correlation of policy and behavior undermining the social norm hypothesis but the findings also raise doubts about the role that welfare policy played in the changes in family structure over the century the correlation between welfare benefits and family structure only appears in 1970 and then only for whites

children as income producing assets the case of teen illegitimacy and government transfers this paper develops a classical model of the teen fertility decision in the presence of public income transfers the theoretical model predicts that welfare payments will encourage fertility holding constant other economic opportunities and that better economic opportunities will discourage fertility considering the possible simultaneity of illegitimacy rates and benefit levels due to the collective choice process the authors confirm the theoretical models predictions with state level data from 1980 through 1990 the authors find that including fixed effects in the regression to control for unobserved differences between states does not sufficiently control for endogeneity after controlling for endogeneity real welfare benefits are strongly and robustly related to teen illegitimacy the point estimates of the elasticity with respect to changes in the illegitimacy rate are around 1 3 for white teens and 2 1 for black teens real wages for women with a high school education or less are negatively related to teen illegitimacy for white teens with an elasticity of around 0 4 finally male wages appear to have little effect on the illegitimacy rate for white teens but appear negatively correlated with the illegitimacy rate for black teens in some model specifications authors

the effects of work conditioned transfers on marriage and child well being a review transfer payments to poor families are increasingly conditioned on work although the effects of such programmes on employment are fairly well understood relatively little is known about their effects on marriage or child well being we review a few studies that provide such information here we sketch a theoretical model that draws from the efficient household literature the model is consistent with the wide range of effects that we observe and suggests an explanation for some of the observed differences our theoretical framework likewise explains the observed variation in the effects of such programmes on children social insurance payments increasingly take the form of conditional cash transfers requiring certain types of behaviour from recipients in order to qualify for aid in developed countries the conditions generally take the form of work requirements the american temporary aid to needy families tanf programme requires most recipients to work at least part time benefits from the american earned income tax credit eitc are available only to consumers who work the british working tax credit wtc is available only to consumers who work at least 16 hours per week and the canadian self sufficiency programme ssp which ran during the 1990s provided an earnings supplement to welfare recipients who were willing to leave the dole and take a full time job

non cooperative bargaining theory an introduction the paper provides an informal introduction to some of the main themes of the recent literature on non cooperative or sequential bargaining models it focuses in particular on the relationship between the new approach and the traditional axiomatic approach exemplified by nash bargaining theory it illustrates the new insights offered by the non cooperative approach by reference to a detailed analysis of the manner in which the presence of an outside option available to one of the parties will affect the negotiated outcome finally the difficulties which arise in extending this analysis to two person bargaining with incomplete information and to n person bargaining are discussed this is a revised version of the fourth review of economic studies lecture presented in april 1985 at the joint meeting of the association of university teachers of economics and the royal economic society held in oxford the choice of lecturer is made by a panel whose members are currently professors hahn mirrlees and nobay and the paper is refereed in the usual way this paper aims to provide an informal and elementary introduction to an approach to bargaining which has received a great deal of attention over the past few years the approach involves writing down some particular sequence of moves offers and replies to be made over time in the course of negotiations and then looking for a non cooperative equilibrium in the game thus specified in practice a perfect equilibrium or in games of incomplete information a sequential equilibrium while the approach appears at first sight to be very different in spirit from the traditional axiomatic approach in which a bargaining solution is specified by appealing to a number of general requirements which are deemed appropriate on the basis of some a priori considerations the two approaches are in fact complementary while the

speculation and demand reduction in english clock auctions with resale many auctions are followed by a resale market which occurs when the winner of the auction resells the item won to one of the participants from the original auction the existence of such transactions may initially appear counter intuitive however this paper will show that active inter bidder resale results from payoff maximizing decisions in the auction that take into account the incentives of a resale opportunity specifically i examine how the existence of an inter bidder resale opportunity impacts bidder behavior in an english clock auction and to what extent altering the bargaining power of the final buyer and reseller in the resale market determines the strategies followed in the initial auction in an attempt to understand the existence of these inter bidder transactions theoretical and behavioral analysis is used to develop hypotheses of speculation bidding above value and demand reduction bidding below value which are directly tested in a controlled experimental setting while value bidding is a dominant strategy in a standard english clock auction without resale when resale is allowed this theoretical claim is weaker demand reduction is observed when the bargaining power is shifted to the final buyer in resale and when the bargaining power is shifted toward the reseller speculation is observed the revenue achieved in the initial auction depends on the behavior observed in the auction regardless of bargaining power revenue is shown to decrease below what would have been earned in an english auction without resale due to demand reduction when the reseller has the bargaining power and speculation is observed this loss in revenue is somewhat mitigated by increased speculation

the impact of welfare benefits on the conjugal status of single mothers in canada estimates from a hazard model this paper focuses on the determinants of the likelihood of a remarriage marriage for female heads with children using retrospective data from statistics canada s 1990 family history survey the study attempts to identify which socioeconomic characteristics of single mothers are conducive to conjugal union formation formal or informal particular attention is given to external time varying economic covariates so as to disentangle the impact they exert on single mothers propensity to start living with a new partner the empirical analysis is carried out using a proportional hazards model which permits the estimation of the effects of various covariates on the hazard of exiting single parenthood the most striking result is the strong effect of provincial welfare benefits on conjugal union formation however the analysis reveals that single motherhood far from representing a final state remains a transitory situation for a majority of women

a comparison of choice based multinomial and nested logit models the family structure and welfare use decisions of divorced or separated women home based work differs from other employment because the work site is the home itself this difference means that the fixed costs of working at home are less than the fixed costs of working on site and that home based workers may engage in joint market

taxes and transfers their effects on the decision to end a marriage abstract the transfer system typically has large marriage disincentives while the income tax system is likely to subsidize marriage for many low income families in other words the tax system may offset an increase in transfer benefits associated with marital separation the interaction of the transfer system with the income tax system has largely been overlooked the income tax system has become more relevant for low income families with the recent expansion of the earned income tax credit which filers may be eligible for even if their tax liability is zero this paper uses family level measures of the change in transfer benefits and tax liability associated with a change in family structure to consider the effect of these financial incentives on separation decisions

partial retirement as a separate mode of retirement behavior partial retirement is a quantitatively important retirement state that shows significant structural differences from behavioral functions of either full retirement or full time work alternative models of the choice of retirement state are estimated on a sample of white married males from the retirement history survey 1967 1973 findings suggest that while partial retirement appears to take several different forms the critical choice for a large number of older workers appears to be that of labor force participation first with either partial or full time employment determined conditionally among participants the model has good explanatory power and conforms to expectations of the effects of various relevant variables on labor supply decisions

welfare effects on female headship with area effects the existing literature on welfare effects on female headship in the united states shows significant positive correlations in cross section possibly increasing over time however when geographic or area effects are permitted in the estimation these correlations either disappear or reverse in sign the results have implications for the study of welfare effects in other countries including canada where benefits vary considerably across provinces and localities within them

multi object auctions with resale theory and experiment abstract we study multi object auctions in the presence of post auction trade opportunities among bidders who have either single or multi object demand we focus on two formats vickrey auctions where package bidding is possible and simultaneous second price auctions we show that under complementarities the vickrey format has an equilibrium where the objects are allocated efficiently at the auction stage whether resale markets are present or not the simultaneous second price on the other hand leads to inefficiency with or without resale possibility our experimental findings show that the possibility of resale in second price auctions decreases the efficiency rate at the auction stage compared to the no resale case however after resale the efficiency rate in second price is as high as that of vickrey auction without resale outcomes in the experiment preventing resale neither benefits nor hurts auction revenues in a second price format

marital status and fertility in the united states welfare and labor market effects the incidence of marriage and the proportion of childbearing that occurs within marriage have decreased sharply in the united states in the last several decades this paper examines whether the probability that a woman is currently married and the number of children she has borne as reported in the 1980 u s census are related to two identifiable factors the variation in welfare programs across states specifically afdc and medicaid benefits and afdc up expenditures or the variation in the market wage opportunities available to women and to their potential husbands afdc and medicaid benefit levels are associated with fewer women being currently married medicaid benefits are related to lower fertility levels for both black and white women whereas afdc benefits in cash and food are associated with lower fertility among white women ages 15 24 those states that extend afdc benefits to families with unemployed parents in other words fathers in intact poor families do not have significantly more women married or higher fertility rates contrary to what might be expected from economic incentives men s market wages are associated with more frequent marriage and higher fertility whereas higher market wage opportunities for women have substantial effects in the opposite direction all of which are consistent with standard models of gender specialization and the demand for marriage and fertility

asymmetric auctions with resale we study first and second price auctions with resale in a model with indepen dent private values with asymmetric bidders the resulting inefficiencies create a motive for post auction trade which in our model takes place via monopoly pricing the winner makes a take it or leave it offer to the loser we show a a first price auction with resale has a unique monotonic equilibrium and b with resale the expected revenue from a first price auction exceeds that from a second price auction the inclusion of resale possibilities thus permits a gen eral revenue ranking of the two auctions that is not available when these are excluded jel d44

auctions with resale markets an application to u s forest service timber sales when bidders anticipate an opportunity for resale trade the value of winning an auction is determined in part by the option values of buying and selling in the secondary market one implication is that a bidder s willingness to pay at an auction increases with the expected level of competition between resale buyers empirical evidence from auctions of timber contracts supports this prediction and rejects standard models that ignore resale the estimated effect is smaller after policy changes expected to diminish the prevalence of resale additional evidence supports the predicted presence of a common value element introduced by the resale opportunity

the socioeconomic consequences of in work benefit reform for british lone mothers in october 1999 the british government enacted the working families tax credit which aimed at encouraging work among low income families with children this paper uses panel data collected between 1991 and 2001 to evaluate the effect of this reform on single mothers we find that the reform led to a substantial increase in their employment rate of about five percentage points which was driven by both a higher rate at which lone mothers remained in the labor force and a higher rate at which they entered it women s responses were highly heterogeneous with effects double this size for mothers with one preschool aged child and virtually no effect for mothers with multiple older children the employment increase was accompanied by significant increases in paid childcare utilization and our analysis in fact suggests that the generous childcare credit component of the reform played a key role in explaining the estimated employment and childcare usage responses we also find that the increase in labor market participation was accompanied by reductions in single mothers subsequent fertility and in the rate at which they married behavioral responses which in turn are likely to influence the reform s overall impact on child poverty and welfare

welfare effects on the marital decisions of never married mothers the economic theory of marriage suggests that more generous welfare benefits should serve to reduce the probability of marriage among mothers who have given birth out of wedlock this relationship is explored using data on never married mothers in the national longitudinal survey of youth only very limited evidence indicates that higher welfare payments lower the probability of marriage for nonblack never married mothers for black never married mothers the results suggest that higher benefits are associated with higher marriage rates

unemployment insurance and unemployment spells this paper tests the effects of the level and length of unemployment insurance benefits on unemployment durations the paper particularly studies individual behavior during the weeks just prior to when benefits lapse higher unemployment insurance benefits are found to have a strong negative effect on the probability of leaving unemployment however the probability of leaving unemployment rises dramatically just prior to when benefits lapse individual data are used with accurate information of spell durations and the level and length of benefits the semiparametric estimation techniques used in the paper yield more plausible estimates than conventional approaches and provide useful diagnostics copyright 1990 by the econometric society

does means testing welfare discourage saving evidence from a change in afdc policy in the united states abstract this paper provides empirical evidence on the impact of a welfare program s asset test on the saving behavior of its target population the approach exploits a policy experiment the essential federalization of the afdc program s asset testing policy in 1981 data on female headed households from the national longitudinal survey young women are used to test the hypothesis that likely afdc users adjusted their asset stocks in response to this change the findings indicate additional saving between 1978 and 1983 of about 25 cents for each additional 1 increase in the limit in most states

resale in second price auctions with costly participation abstract we study sealed bid second price auctions with costly participation and resale each bidder chooses to participate in the auction if her valuation is higher than her optimally chosen participation cutoff if resale is not allowed and the bidder valuations are drawn from a strictly convex distribution function the symmetric equilibrium where all bidders use the same cutoff is less efficient than a class of two cutoff asymmetric equilibria existence of these equilibria without resale is sufficient for existence of similarly constructed two cutoff equilibria with resale moreover the equilibria with resale are more asymmetric and under a sufficient condition more efficient than the corresponding equilibria without resale

functional forms exogenous shifts and economic surplus changes conditions for exact welfare measures in equilibrium displacement modeling are examined these relate to the functional form of supply and demand the nature of the exogenous shift and the definition of percentage changes approximation errors when these conditions are not met in empirical applications are investigated and analytical expressions for the errors derived significant errors are possible when a proportional shift is assumed the assumptions underlying alston and wohlgenant s empirical findings are identified the restriction that supply must be elastic is shown to be unnecessary

bidding to lose auctions with resale a losing bidder can still purchase the prize from the winner after the auction we show why a strong bidder may prefer to drop out of the auction before the price has reached her valuation and acquire the prize in the aftermarket a strong bidder may be in a better bargaining position in the aftermarket if her rival won at a relatively low price so it can be common knowledge that in equilibrium a weak bidder will win the auction and even without uncertainty about relative valuations resale will take place the possibility of reselling to a strong bidder attracts weak bidders to participate in the auction and raises the seller s revenue

social assistance and conjugal union dissolution in canada a dynamic analysis using statistics canadas general social survey on family and friends carried out in 1990 we piece together the matrimonial and conjugal life history of a large sample of canadian men and women we then estimate duration models coxs proportional hazard models describing the evolutionary laws of marriages and unions which depend on various economic or socio demographic explanatory variables the empirical modelling focuses primarily on estimating the impact of couples earned incomes and of provincial welfare programs on the dissolution rate of first marriages and unions we find that welfare benefits do not have an impact on the hazard of union dissolution and that earned incomes have a positive effect on conjugal stability excerpt summary in fre

how not to run auctions the european 3g telecom auctions abstract there were enormous differences in the revenues from the european third generation 3g or umts mobile phone license auctions from 20 euros per capita in switzerland to 650 euros per capita in the uk though the values of the licenses sold were similar poor auction designs in some countries facilitated collusion between firms and failed to attract entrants the sequencing of the auctions was also crucial we discuss the auctions in the uk netherlands germany italy austria switzerland belgium greece and denmark

speculation in standard auctions with resale in standard auctions resale creates a role for a speculator a bidder who is commonly known to have no use value for the good on sale we study this issue in environments with symmetric independent private value bidders for second price and english auctions the efficient value bidding equilibrium coexists with a continuum of inefficient equilibria in which the speculator wins the auction and makes positive profits first price and dutch auctions have an essentially unique equilibrium and whether or not the speculator wins the auction and distorts the final allocation depends on the number of bidders the value distribution and the discount factor speculators do not make profits in first price or dutch auctions

demand for farm output in a complete system of demand functions demand interrelationships for farm outputs that are theoretically consistent with consumer demand and marketing group behavior provide important linkages between retail and farm prices a conceptual model based on reduced form specifications for retail and farm prices is formulated and applied empirically to a set of eight disaggregated food commodities this approach circumvents the need for retail quantities which are frequently unavailable for disaggregated food commodities the results are consistent with theory and generally indicate significant substitution between farm and marketing inputs except for poultry derived demand elasticities are at least 40 larger compared to those derived assuming fixed proportions

the effect of the u s welfare system on marital status abstract an issue of long standing importance in the u s welfare system has been its lack of neutrality with respect to family composition which generally provides payments only to female headed families that is families with no able bodied male present using data from 1969 to 1985 to examine the issue this study finds that 1 the simple cross sectional correlations between marital status and welfare benefits are almost always in the expected direction but are generally weak in significance 2 that the magnitude and significance of the correlations have nevertheless grown over time and 3 that the correlations for men are no weaker and usually stronger especially for blacks than those for women

will extending medicaid to two parent families encourage marriage several welfare programs in the united states restrict eligibility to single parent families this paper asks whether eliminating this restriction for medicaid encourages marriage i identify medicaid s effect through a series of health insurance reforms that were passed in the 1980s and 1990s targeting young children these reforms were associated with an increase in the probability of marriage of 1 7 percentage points while the expansions offered some incentives to become married they also created other incentives to become divorced known as the independence effect after controlling for the outflows from marriage due to the independence effect the estimated effect increases by 10 percent

high bids and broke winners abstract this paper analyzes auctions where budget constrained bidders have options to declare bankruptcy it predicts a bidding equilibrium that changes discontinuously in a borrowing rate available to bidders when the borrowing rate is above a threshold high budget bidders win and the likelihood of bankruptcy is low when the borrowing rate is below the threshold the winner is the most budget constrained bidder and is most likely to declare bankruptcy this result explains the high bids and broke winners anomaly in the c block fcc spectrum auction based on its equilibrium analysis the paper proves that a seller can profit from offering to finance the highest bidder at a below market interest rate even with default risk journal of economic literature classification numbers d44 d45 d82 g33 l96

the role of economic incentives in teenage nonmarital childbearing choices abstract in this paper we explore whether behaviors of youths that are likely to result in a teen nonmarital birth event are influenced by their expectations of the net economic benefits or costs associated with the occurrence of such a birth we posit and find that an increase in the perceived costs associated with the occurrence of a nonmarital birth would lead to a reduction in these risky behaviors and to a lower probability of a nonmarital birth event we represent these economic incentives by the income expectations of young women conditional on either giving birth as an unmarried teen or forgoing childbearing while unmarried and an adolescent we also measure the effects of an extensive list of other factors including the characteristics of the girl s family and its choices the social and economic environment in which she lives including policy related factors such as expenditures by states on family planning programs and the generosity of aid to families with dependent children and her own prior choices

the married widow marriage penalties matter marriage penalties are a controversial feature of many government policies empirical evidence of their behavioral effects is quite mixed which is surprising because economic theory predicts that they should have an impact on the headship decision we investigate the removal of marriage penalties from the surviving spouse pensions of the canadian public pension system in the 1980s these reforms provide a simple and transparent source of identification our results indicate that marriage penalties can have large and persistent effects on marriage decisions we also present evidence suggesting that it is individuals with characteristics correlated with greater wealth who respond to the penalties jel j1 h2

welfare marital prospects and nonmarital childbearing the roles of the entitlements of the afdc program and marital prospects in the fertility and marriage choices of young women are assessed in the context of a model incorporating heritable endowment heterogeneity assortative mating concern for child quality and potential parental and public support alternatives estimates based on data describing the fertility and marital experience up to age 23 of the eight birth cohorts of women in the nlsy provide evidence that higher afdc benefit levels and lower marital prospects induce young women to choose to have a child outside of marriage

evaluating the effects of optimally distributed public programs child health and family planning interventions this paper develops and tests an optimizing model determining the distribution of family planning and health subsidies across heterogeneous households and assesses the biases in cross area estimates of the health effects of such subsidies due to public resource optimization the model incorporates both health externalities and the endogenous response of the size of the recipient population to program subsidies longitudinal data describing child health and publicly provided family planning and health programs in 20 barrios in laguna province in the philippines are used to estimate the effects of such programs on child health and the relationships between the distribution of the programs and preprogram health levels the impact of a program on a particular childs health status is viewed as dependent upon the childs length of exposure to the program a basic feature of the model is the presence of health externalities which is shown to be sufficient along with plausible features of household behavior to make selective subsidization of fertility control either alone or in combination with health investment subsidies pareto efficient the model suggests that subsidization of fertility control is likely to be pareto efficient in the presence of health or human capital externalities when human capital and family size are gross substitutes and or when any per child human capital subsidies may substitute for direct subsidies to health investment and an equalizing distribution of the subsidies the highest family planning subsidies to the lowest health recipient households is efficient when both health and family planning subsidies are used fertility control subsidies minimize the subsidy burden for donors and are highest when total subsidy expenditures per child are greatest

home based work and women s labor force decisions home based work differs from other employment because the work site is the home itself this difference means that the fixed costs of working at home are less than the fixed costs of working on site and that home based workers may engage in joint market and household production using data from the 1990 census we find that home based work is an attractive option for women for whom the fixed costs of work are high women who have small children are disabled or live in rural areas and that home based workers are more likely to choose self employment than are on site workers