evaluating welfare reform in the united states this paper reviews the economic literature on welfare reform over the 1990s a brief summary of the policy changes is followed by a discussion of the methodological techniques that analyze the effects of these changes on outcomes the paper then critically reviews the econometric and experimental literature on caseload changes labor force changes poverty and income changes and family formation changes a growing body of evidence suggests that recent policy changes have influenced economic behavior and well being one particular set of new style welfare programs seems to show especially promising results with significantly increased work and earnings and reduced poverty

assessing the case for social experiments rs ecent academic debates pit two alternative approaches to policy evaluation against one another the first is the experimental approach based on the random assignment of accepted program applicants to a recipient or treatment group and a non recipient or control group the second is the nonexperimental or econometric approach that uses a variety of microdata sources statistical methods and behavioral models to compare the outcomes of participants in social programs with those of nonparticipants the central question addressed in this paper is whether or not randomized social experiments aid in securing answers to basic questions about the evaluation of social programs there are many distinct and complementary approaches to the study of the impact of public policy including full general equilibrium analysis of policy impacts tinbergen 1956 auerbach and kotlikoff 1987 shoven and whalley 1992 kydland and prescott 1991 and less ambitious partial equilibrium microeconomic structural research programs such as those designed to estimate the impact of taxes on labor supply both approaches offer answers to many interesting counterfactual policy questions but their credibility rests critically on the quality of the empirical input used to generate their answers

how financial incentives induce disability insurance recipients to return to work using a local randomized experiment that arises from a sharp discontinuity in disability insurance di policy in norway we provide transparent and credible identification of how financial incentives induce di recipients to return to work we find that many di recipients have considerable capacity to work that can be effectively induced by providing financial work incentives we further show that providing work incentives to di recipients may both increase their disposable income and reduce program costs our findings also suggest that targeted policies may be the most effective in encouraging di recipients to return to work

incentive effects of the u s welfare system a review the author would like to acknowledge support for prior work on this topic from the u s department of health and human services and helpful comments from three anonymous referees rebecca blank howard chernick john fitzgerald irwin garfinkel peter gottschalk edward gramlich david greenberg judith gueron james heckman v joseph hotz robert hutchens michael keane frank levy larry mead michael murray robert plotnick anuradha rangarajan philip robins howard rolston jeffrey smith and daniel weinberg all opinions and errors are those of the author alone

what mean impacts miss distributional effects of welfare reform experiments labor supply theory predicts systematic heterogeneity in the impact of recent welfare reforms on earnings transfers and income yet most welfare reform research focuses on mean impacts we investigate the importance of heterogeneity using random assignment data from connecticut s jobs first waiver which features key elements of post 1996 welfare programs estimated quantile treatment effects exhibit the substantial heterogeneity predicted by labor supply theory thus mean impacts miss a great deal looking separately at samples of dropouts and other women does not improve the performance of mean impacts we conclude that welfare reform s effects are likely both more varied and more extensive than has been recognized

is universal child care leveling the playing field abstract we assess the case for universal child care programs in the context of a norwegian reform which led to a large scale expansion of subsidized child care we use non linear difference in differences methods to estimate the quantile treatment effects of the reform we find that the effects of the child care expansion were positive in the lower and middle parts of the earnings distribution of exposed children as adults and negative in the uppermost part we complement this analysis with local linear regressions of the child care effects by family income we find that most of the gains in earnings associated with the universal child care program relate to children of low income parents whereas upper class children actually experience a loss in earnings in line with the differential effects by family income we estimate that the universal child care program substantially increased intergenerational income mobility to interpret the estimated heterogeneity in child care effects we examine the mediating role of educational attainment and cognitive test scores and show that our estimates are consistent with a simple model where parents make a tradeoff between current family consumption and investment in children taken together our findings could have important implications for the policy debate over universal child care programs suggesting that the benefits of providing subsidized child care to middle and upper class children are unlikely to exceed the costs our study also points to the importance of universal child care programs in explaining differences in earnings inequality and income mobility across countries and over time

welfare dynamics under time limits among the most important changes brought about by the personal responsibility and work opportunity reconciliation act of 1996 are time limits which provide consumers with an incentive to conserve their welfare benefits for future use among forward looking expected utility maximizing consumers who face liquidity constraints and earnings uncertainty economic theory predicts that the incentive to conserve should be strongest among families with the youngest children we test this prediction using data from florida s family transition program a randomized welfare reform experiment our estimates generally exhibit the predicted age dependence which suggests that time limits affect welfare use before they become binding our estimates indicate that in the absence of other reforms that increased welfare use ftp s time limit would have reduced welfare receipt by 16 percent

the impact of piped water provision on infant mortality in brazil a quantile panel data approach abstract we examine the impact of piped water on the under 1 infant mortality rate imr in brazil using a recently developed econometric procedure for the estimation of quantile treatment effects with panel data the provision of piped water in brazil is highly correlated with other observable and unobservable determinants of imr the latter leading to an important source of bias instruments for piped water provision are not readily available and fixed effects to control for time invariant correlated unobservables are invalid in the simple quantile regression framework using the quantile panel data procedure in chen and khan chen s khan s semiparametric estimation of non stationary censored panel model data models with time varying factor econometric theory 2007 forthcoming our estimates indicate that the provision of piped water reduces infant mortality by significantly more at the higher conditional quantiles of the imr distribution than at the lower conditional quantiles except for cases of extreme underdevelopment these results imply that targeting piped water intervention toward areas in the upper quantiles of the conditional imr distribution when accompanied by other basic public health inputs can achieve significantly greater reductions in infant mortality

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

making the most out of programme evaluations and social experiments accounting for heterogeneity in programme impacts the conventional approach to social programme evaluation focuses on estimating mean impacts of programmes yet many interesting questions regarding the political economy of programmes the distribution of programme benefits and the option values conferred on programme participants require knowledge of the distribution of impacts or features of it this paper presents evidence that heterogeneity in response to programmes is empirically important and that classical probability inequalities are not very informative in producing estimates or bounds on the distribution of programme impacts we explore two methods for supplementing the information in these inequalities based on assumptions about participant decision making processes and about the strength in dependence between outcomes in the participation and non participation states dependence is produced as a consequence of rational choice by participants we test for stochastic rationality among programme participants and present and implement methods for estimating the option values of social programmes

is the quantity quality trade off a trade off for all none or some abstract although the theoretical trade off between the quantity and quality of children is well established empirical evidence supporting such a causal relationship particularly on child health is limited we use two measures of child health to assess the quantity quality trade off across the entire distribution using data from the indonesia family life survey and controlling for the potential endogeneity of child quantity we find modest statistically meaningful evidence of a causal trade off

the effects of time limits the eitc and other policy changes on welfare use work and income among female headed families of all of the welfare reforms that were implemented during the 1990s time limits may represent the single greatest break from past policy this paper expands on what is known about this important welfare reform measure by exploiting the predictions from grogger and michalopoulos 2003 to estimate the effects of time limits on welfare use employment labor supply earnings and income among female headed families results based on data from the march current population survey suggest that time limits have had important effects on welfare use and work accounting for about one eighth of the decline in welfare use and about 7 of the rise in employment since 1993 they have had no significant effect on earnings or income however the analysis also shows that the collective effects of other reforms have had important impacts on employment and labor supply furthermore it identifies the earned income tax credit eitc as a particularly important contributor to both the recent decrease in welfare use and t

price ceilings as focal points to reach price uniformity evidence from a chinese gasoline market abstract this paper studies the price uniformity in the chinese gasoline market using station level data of hohhot city inner mongolia we first document that the mode prices of the gasoline stations are consistent with the price ceilings set by the government implying that the price ceiling regulation in the chinese gasoline market may serve as a focal point for the gasoline stations to reach price uniformity we corroborate the focal point hypothesis by providing evidence showing that some stations would jump to the ceilings as their prices approach the ceilings also we find that local market structure distance between stations station capacity market characteristics and past pricing behavior could affect the probability of gas stations to price at the ceilings moreover a higher price ceiling would reduce the probability that stations reach price uniformity our results provide another piece of evidence to the literature regarding the unintended effect of price ceiling regulation

some evidence on race welfare reform and household income the authors results suggest that for 1997 tanf is associated with insignificant increases in household income for whites and hispanic children and again insignificant reductions in household income for black children the point estimates for 1998 and 1999 bounds suggest that the impact may have been positive for all three groups

trading frequency and volatility clustering abstract volatility clustering with autocorrelations of the hyperbolic decay rate is unquestionably one of the most important stylized facts of financial time series this paper presents a market microstructure model that is able to generate volatility clustering with hyperbolically decaying autocorrelations via traders with multiple trading frequencies using bayesian information updates in an incomplete market the model illustrates that signal extraction which is induced by multiple trading frequencies can increase the persistence of the volatility of returns furthermore we show that the volatility of the underlying time series of returns varies greatly with the number of traders in the market

changes in the distribution of children s family income over the 1990 s while the 1990 s were a good decade for many u s families there has been an ongoing debate about how children particularly poor children have been faring child poverty rates did not fall substantially in the economic expansion of the 1980 s and rose to the very high rate of 23 percent in 1993 furthermore substantial changes in public assistance programs were implemented over this decade major legislative reform in 1996 increased work mandates on welfare recipient families and gave states much greater discretion to enforce these mandates and actually terminate assistance these changes could make at least some poor families worse off if they lost public assistance and were unable to find steady employment we propose to investigate changes in the entire distribution of children s family income over the 1990 s which allows us to observe the relative changes in income experienced among children in higherand lower income families we are particularly interested in two questions i how has the economic status of children changed at different points in the income distribution ii is there any evidence that welfare reform contributed to the observed changes some evidence on changes in child wellbeing over the 1990 s suggests good news child poverty rates fell to 16 percent by 2001 and poverty rates among black children hit a historical low of 30 percent in that year blank 2002 and jeffrey grogger et al 2002 provide a complete set of citations to the growing literature that looks at changes in income and consumption over the past decade at least some of this research indicates that not all low income families experienced economic gains in this paper we use data on children s household income from the march current population survey cps and average together information from 1992 1995 and 1997 2000 by averaging four years of data we have an adequate number of observations to observe income reliably at each centile 1 100 in the distribution we focus on these comparison years because they both bracket the economic expansion of the 1990 s and they bracket the 1996 legislative changes in welfare programs to account for differences in family size across families our focus is on the income to needs ratio defined as the income level of the child s family divided by the official poverty line for that family rather than on actual income levels we compare data from two samples one that includes all children and another that includes only children in families without both parents present this latter sample is largely composed of children in single parent families but also includes children who live with neither parent about 3 percent of all children in the mid 1990 s

collusion with intertemporal price dispersion we develop a theory of optimal collusive intertemporal price dispersion dispersion clouds consumer price awareness encouraging firms to coordinate on dispersed prices our theory generates a collusive rationale for price cycles and sales patient firms can support optimal collusion at the monopoly price for less patient firms monopoly prices must be punctuated with fleeting sales the most robust structure involves price cycles that resemble edgeworth cycles low consumer attentiveness enhances the effectiveness of price dispersion by reducing the payoff to deviations involving price reductions however for sufficiently low attentiveness price rises are also a concern

estimates of effective guarantees and tax rates in the afdc program for the post obra period we employ the model used by fraker moffitt and wolf 1985 to estimate effective tax rates and guarantees in the aid to families with dependent children afdc program for the years 1967 82 to produce comparable estimates for 1983 91 we compare this method of benefit prediction with other methods in the literature and clarify the interpretation of estimates generated using the fraker moffitt and wolf model we use our estimates for the period from 1983 to 1991 to examine how effective afdc tax rates and guarantee levels have changed over time and relative to nominal or official program parameters

effective tax rates and guarantees in the afdc program 1967 1982 estimates of effective tax rates on earned and unearned income and estimates of effective guarantees in the afdc program by state are provided for the period 1967 1982 the results indicate that effective real guarantees fell every year from 1967 to 1981 but stabilized in 1982 effective tax rates on unearned income rose steadily from 1967 to 1981 and took a particularly large additional jump in 1982 effective tax rates on earned income fell after 1967 but then gradually rose throughout the 1970s until 1982 when they took a much larger jump thus guarantees fell and tax rates rose over the 1970s as tight budgets forced states to restrict benefits and in the early 1980s tax rates were pushed even higher by federal legislation

what did medicare do the initial impact of medicare on mortality and out of pocket medical spending abstract we study the impact of the introduction of one of the major pillars of the social insurance system in the united states the introduction of medicare in 1965 our results suggest that in its first 10 years the establishment of universal health insurance for the elderly had no discernible impact on elderly mortality however we find a substantial reduction in the elderly s exposure to out of pocket medical expenditure risk specifically we estimate that the introduction of medicare was associated with a 40 decline in out of pocket spending for the top quartile of the out of pocket spending distribution a stylized expected utility framework suggests that the welfare gains from such reductions in risk exposure alone may be sufficient to cover almost two fifths of the costs of medicare these findings underscore the importance of considering the direct insurance benefits from public health insurance programs in addition to any indirect benefits from an effect on health

the labor supply effects of the social security earnings test the social security earnings test taxes away benefits at a 33 50 rate once earnings pass a threshold amount i investigate the response to three past changes in the earnings test rules each applying to some age groups and not others i find that beneficiaries bunch in substantial numbers just below the earnings threshold and the bunching shifts when the earnings test rules change these shifts in the budget constraint are incorporated into an econometric model to identify income and substitution effects the estimation yields significant elasticities that suggest considerable deadweight loss suffered by working beneficiaries

learning to coordinate a study in retail gasoline this paper studies equilibrium selection in the retail gasoline industry we exploit a unique dataset that contains the universe of station level prices for an urban market for 15 years and that encompasses a coordinated equilibrium transition mid sample we uncover a gradual three year equilibrium transition whereby dominant firms use price leadership and price experiments to create focal points that coordinate market prices soften price competition and enhance retail margins our results inform the theory of collusion with particular relevance to the initiation of collusion and equilibrium selection we also highlight new insights into merger policy and collusion detection strategies

3rd of tha month do social security recipients smooth consumption between checks this paper examines the response of consumption expenditures to the monthly receipt of social security checks since the amount and arrival date of these checks are known to the recipients the basic life cycle permanent income hypothesis lcpih predicts that consumption should not respond to the receipt of these checks using daily diary data from the consumer expenditure survey this paper finds evidence that both the dollar amount and probability of expenditures increase immediately following the receipt of this check most relevant to testing the lcpih categories of instantaneous consumption expenditure such as food away from home increase on the check arrival date the response is found primarily amongst households for whom social security is the primary source of income however the magnitude of the estimated responses are relatively small and do not suggest that the utility losses are large from this non smoothing behavior this abstract was borrowed from another version of this item

the virtuous tax lifesaving and crime prevention effects of the 1991 federal alcohol tax increase the last time that federal excise taxes on alcoholic beverages were increased was 1991 the changes were larger than the typical state level changes that have been used to study price effects but the consequences have not been assessed due to the lack of a control group here we develop and implement a novel method for utilizing interstate heterogeneity to estimate the aggregate effects of a federal tax increase on rates of injury fatality and crime we provide evidence that the relative importance of alcohol in violence and injury rates is directly related to per capita consumption and build on that finding to generate estimates a conservative estimate is that the federal tax which increased alcohol prices by 6 initially reduced injury deaths by 4 5 6480 deaths in 1991 and had a still larger effect on violent crime