cake eating exhaustible resource extraction life cycle saving and non atomic games existence theorems for a class of optimal allocation problems abstract this paper investigates the problem concerning the existence of a solution to a diverse class of optimal allocation problems which include models of cake eating exhaustible resource extraction life cycle saving and non atomic games a new formulation that encompasses all these diverse models is provided examples of these models for which a solution does not exist and the causes of the non existence are studied two theorems are provided to tackle the existence problem under different conditions several analytical examples with a closed form solution are offered to illustrate the usefulness of the existence theorems

a rank dependent utility model of uncertain lifetime abstract in a continuous time life cycle model of consumption with an uncertain lifetime we use a non parametric specification of rank dependent utility theory to characterize the preferences of the agent we prove that time consistency holds for a subclass of probability weighting function providing the foundation for a constant rate of time preference that interacts multiplicatively with the hazard rate instead of additively as in the yaari 1965 seminal model we calibrate both models to explain the hump in the life cycle consumption and show that the multiplicative model is more robust

group lending repayment incentives and social collateral abstract in this paper we investigate the impact on repayment rates of lending to groups which are made jointly liable for repayment this type of scheme especially in the guise of the grameen bank in bangladesh has received increasing attention we set up and analyze the repayment game which group lending gives rise to our analysis suggests that such schemes have both positive and negative effects on repayment rates the positive effect is that successful group members may have an incentive to repay the loans of group members whose projects have yielded insufficient return to make repayment worthwhile the negative effect arises when the whole group defaults even when some members would have repaid under individual lending we also show how group lending may harness social collateral which serves to mitigate its negative effect

an evaluation of the life cycle effects of minimum pensions on retirement behavior in this paper we explore the effects of the minimum pension program on welfare and retirement in spain this is done with a stylized life cycle model which provides a convenient analytical characterization of optimal behavior we use data from the spanish social security to estimate the behavioral parameters of the model and then simulate the changes induced by the minimum pension in aggregate retirement patterns the impact is substantial there is a threefold increase in retirement at 60 the age of first entitlement with respect to the economy without minimum pensions and total early retirement before or at 60 is almost 50 larger copyright 2007 john wiley sons ltd

the highs and lows of the minimum wage effect a time series cross section study of the canadian law we examine the effects of minimum wage legislation in canada over the period 1975 93 for teenagers we find that a 10 increase in the minimum wage is associated with roughly a 2 5 decrease in employment we also find that this result is driven by low frequency variation in the data at high frequencies the elasticity is positive and insignificant the difference in the elasticity across the bandwidth has implications for the interpretation of employment dynamics as a result of minimum wage policy and experimental design in minimum wage studies it also provides a simple reconciliation of the new minimum wage research which reports very small negative or positive elasticities

does microcredit increase household welfare in the absence of microinsurance summary this study answers the question does a combination of microcredit and microinsurance improve the wellbeing of low income households we examine this challenge through heckman sample selection instrumental variable and treatment effect models the findings indicate that households using microcredit in combination with microinsurance derive significant gains in terms of welfare improvement microcredit may be good but its benefit to the poor is enhanced and sustained if the poverty trapping risks are covered with microinsurance to this extent combining microcredit with microinsurance will empower the poor to make a sustainable exit from poverty

using local labor market data to re examine the employment effects of the minimum wage using quarterly census data for 1996 2000 the author evaluates how minimum wages affected teenage employment at the county level an analysis that includes all counties yields small and statistically insignificant effects consistent with previous research using state panels however in counties where the minimum wage was likely binding above the market clearing wage for teens the negative impact on employment was considerably larger the effect was strongest in small counties was restricted to transitory jobs and new hires and apparently was not experienced by young adults ages 19 22 the small employment effects found in much of the literature the author argues at least partly reflect the estimates inclusion of local labor markets where the minimum wage is not binding by averaging the effects across all areas with no disaggregation based on where the minimum wage is binding and where it is not these studies overlook important regional variation

why are informal loans still a big deal evidence from north east thailand abstractthis article examines the use and benefit of informal loans for different income groups of rural households in north east thailand using a difference in differences estimation approach which is later complemented by propensity score matching the article shows that different household groups profit from informal loans in different ways poor households increase their asset endowment and in particular farming assets whereas rich households food consumption rises especially if households borrow due to a shock by showing that informal loans serve different households for different purposes this article provides an explanation why they still play an important role

thinking inside the box a closer look at financial inclusion and household income using national representative household finance survey data covering more than 6200 chinese households we first construct a new multidimensional indicator for financial inclusion then we examine the effect of financial inclusion on household income our results elicit several findings first financial inclusion has a strong positive effect on household income this effect can be found across all households with different levels of income second low income households are found to benefit more from financial inclusion than high and mid level income ones we argue that in this sense financial inclusion helps reduce income inequality

does microfinance reduce poverty in bangladesh new evidence from household panel data abstract the study examines whether loans from microfinance institutions mfi reduce poverty in bangladesh drawing upon the nationally representative household panel with four rounds from 1997 to 2004 the effects of general microfinance loans and loans for productive purposes on income food consumption and women s body mass index are estimated overall effects of mfi loans on income and food consumption were positive and the purpose of the loan is important in predicting which household welfare indicator is improved alternative estimation methods confirm a positive impact of mfi loans on food consumption growth which supports the poverty reducing effects of microfinance in bangladesh

minimum wages and retirement the authors study the effect of the minimum wage on the employment outcomes and social security claiming of older us workers from 1983 to 2016 the probability of work at or near the minimum wage i

credible research designs for minimum wage studies a response to neumark salas and wascher the authors assess the critique by neumark salas and wascher 2014 of minimum wage studies that found small effects on teen employment data from 1979 to 2014 contradict nsw the authors show th

microfinance and poverty evidence using panel data from bangladesh micro finance supports mainly informal activities that often have low market demand it may be thus hypothesized that the aggregate poverty impact of micro finance in an economy with low economic growth is modest or nonexistent the observed borrower level poverty impact is then a result of income redistribution or short run income generation the author addresses these questions using household level panel data from bangladesh the findings confirm that micro finance benefits the poorest and has sustained impact in reducing poverty among program participants it also has positive spillover impact reducing poverty at the village level but the effect is more pronounced in reducing extreme rather than moderate poverty

the career costs of children this paper analyzes the life cycle career costs associated with child rearing and decomposes their eects into unearned wages as women drop out of the labor market loss of human capital and selection into more child friendly occupations we estimate a dynamic life cycle model of fertility occupational choice and labor supply using detailed survey and administrative data for germany for numerous birth cohorts across dierent regions we use this model to analyze both the male female wage gap as it evolves from labor market entry onward and the eect of pro fertility policies we show that a substantial portion of the gender wage gap is explainable by realized and expected fertility and that the long run eect of policies encouraging fertility are considerably lower than the short run eects typically estimated in the literature

hiring churn and the business cycle hires occur for two reasons to grow a business and to replace those who have left churn churn is an important part of employment dynamics allowing workers to move to their most productive use we present evidence on churn from the job openings and labor turnover survey jolts churn is procyclical during the 2007 09 recession four fifths of hiring reductions are associated with reduced churn not with reductions in job creation we estimate that the cost of reduced churn is about two fifths of a percentage point of gdp annually throughout the three and one half year period since the beginning of the recession

china s uneven progress against poverty while the incidence of extreme poverty in china fell dramatically over 1980 2001 progress was uneven over time and across provinces rural areas accounted for the bulk of the gains to the poor though migration to urban areas helped the pattern of growth mattered rural economic growth was far more important to national poverty reduction than urban economic growth agriculture played a far more important role than the secondary or tertiary sources of gross domestic product gdp rising inequality within the rural sector greatly slowed poverty reduction provinces starting with relatively high inequality saw slower progress against poverty due both to lower growth and a lower growth elasticity of poverty reduction taxation of farmers and inflation hurt the poor external trade had little short term impact

optimal life insurance purchase and consumption investment under uncertain lifetime abstract in this paper we consider optimal insurance and consumption rules for a wage earner whose lifetime is random the wage earner is endowed with an initial wealth and he also receives an income continuously but this may be terminated by the wage earner s premature death we use dynamic programming to analyze this problem and derive the optimal insurance and consumption rules explicit solutions are found for the family of crra utilities and the demand for life insurance is studied by examining our solutions and doing numerical experiments

microfinance and poverty a macro perspective we test the hypothesis that microfinance reduces poverty at the macro level using cross country and panel data which are constructed by the microfinance information exchange data on microfinance institutions mfis and the world bank data taking account of the endogeneity associated with mfis loans we show that a country with higher mfis gross loan portfolio per capita tends to have lower levels of poverty indices contrary to recent micro evidence our results suggest that microfinance significantly reduces poverty at macro level and thus reinforce the case for channeling funds from development finance institutions and governments of developing countries into mfis

social security and retirement in uruguay abstractwe estimate a structural life cycle model for retirement behaviour using work history records of the main uruguayan pension programme the estimated coefficient of relative risk aversion is around 1 5 and the estimated discount rate is about 1 8 per cent per annum the marginal disutility of work increases with age and is larger for women than men and for private than public employees simulations show a very low impact of the 1995 pension reform on retirement ages many individuals in this population respond little to economic incentives and some individuals would advance rather than postpone retirement after the reform

social security and the retirement decision the effect of social security and private pensions on individual retirement decisions is modeled relaxing in turn three commonly maintained assumptions perfect capital markets actuarial fairness and certain lifetimes which together imply that there is no effect in each case raising the contribution level can cause systematic changes of either sign in general in individual retirement decisions for social security the effects associated with forced saving and deviations from actuarial fairness probably tend to advance retirement but those effects that arise solely from the insurance aspect of social security and private pensions are ambiguous in sign owing to the presence of a substitution effect that tends to delay retirement because the insurance benefits can be fully realized only by working longer

employment effects of minimum and subminimum wages panel data on state minimum wage laws using panel data on state minimum wage laws and economic conditions for the years 1973 89 the authors reevaluate existing evidence on the effects of a minimum wage on employment their estimates indicate that a 10 increase in the minimum wage causes a decline of 1 2 in employment among teenagers and a decline of 1 5 2 in employment for young adults similar to the ranges suggested by earlier time series studies the authors also find evidence that youth subminimum wage provisions enacted by state legislatures moderate the disemployment effects of minimum wages on teenagers

the minimum wage restaurant prices and labor market structure using store level and aggregated consumer price index data we show that restaurant prices rise in response to minimum wage increases under several sources of identifying variation we introduce a general model of employment determination that implies minimum wage hikes cause prices to rise in competitive labor markets but potentially fall in monopsonistic environments furthermore the model implies employment and prices are always negatively related therefore our empirical results provide evidence against the importance of monopsony power for understanding small observed employment responses to minimum wage changes our estimated price responses challenge other explanations of the small employment response too

the impact of the correlation between health expenditure and survival probability on the demand for insurance abstract this paper studies the effects of health shocks on the demand for health insurance and annuities along with precautionary saving in a dynamic life cycle model i argue that when the health shock can simultaneously increase health expenses and reduce longevity rational agents would neither fully insure their uncertain health expenses nor fully annuitize their wealth because the correlation between health expenses and longevity provides a self insurance channel for both uncertainties that is when the agent is hit by a health shock which simultaneously increases health expenses and reduces longevity she can use the resources originally saved for consumption in the reduced period of life to pay for the increased health expenses since the two uncertainties partially offset each other the precautionary saving generated in the model should be smaller than in a standard model without the correlation between health expenses and longevity in a quantitative life cycle model calibrated using the medical expenditure panel survey dataset i find that the health expenses are highly correlated with the survival probabilities and this correlation significantly reduces the demand for actuarially fair health insurance while its impact on the demand for annuities and precautionary saving is relatively small

the role of microcredit in older children s nutrition quasi experimental evidence from rural china abstract this article evaluates the causal impact of rural households borrowing through formal microcredit on child nutrition in poor northwest china the analysis exploits the panel data in rural gansu between 2000 and 2004 unobserved differences between borrowers and non borrowers are controlled for in a dynamic fuzzy regression discontinuity design creating a quasi experimental environment for causal inference both anthropometric and micronutrient measures of child nutrition are investigated borrowing formal microcredit improves parent reported health status and weight and alleviates anemia and zinc deficiency all effects nevertheless appear to exist in the short term only

getting handcuffs on an octopus theoretical work on minimum wage policy emphasizes labor market dynamics but the resulting implications for worker mobility remain largely untested the authors show that in the teenage labor market higher minimum wage standards reduce worker flows and increase job stability furthermore they find that the employment effects of a relatively higher minimum wage vary considerably across markets with different levels of turnover and labor market tightness results help to explain the small effects of minimum wage standards on employment commonly found in the aggregate data and are consistent with labor market models that involve search frictions

new evidence on pensions social security and the timing of retirement using a unique dataset that links the economic and demographic information of households with the details of their pension formulas i estimate the combined effect of social security and pension benefits on the probability of retirement in a cross section of the population near retirement age the accrual rate of retirement wealth is shown to be a significant determinant of the probability of retirement simulations of extensions in pension coverage comparable to those that occurred in the early postwar period can account for one fourth of the contemporaneous decline in labor force participation rates 1998 elsevier science s a all rights reserved

reply to credible research designs for minimum wage studies the authors make three points in this reply to the article by allegretto dube reich and zipperer adrz 2017 first adrz shed no new light on the sensitivity of estimated minimum wage employmen

minimum wages and youth unemployment abstract this paper constructs a labor search model to explore the effects of minimum wages on youth unemployment to capture the gradual decline in unemployment for young workers as they age the standard search model is extended so that workers gain experience when employed experienced workers have higher average productivity and lower job finding and separation rates that match wage and worker flow data in this environment minimum wages can have large effects on unemployment because they interact with a worker s ability to gain job experience the increase in minimum wages between 2007 and 2009 can account for a 0 8 percentage point increase in the steady state unemployment rate and a 2 8 percentage point increase in unemployment for 15 24 year old workers in the model parameterized to simulate outcomes of high school educated workers minimum wages can also help explain the high rates of youth unemployment in france compared to the united states

the individual life cycle annuity market imperfections and economic growth we study the effects of an annuity market imperfection on individual agents life cycle decisions and on the macroeconomic growth rate in an overlapping generations model with single sector endogenous growth our model features both age dependent mortality and labour productivity we model imperfect annuities by introducing a load factor on the annuity rate faced by finitely lived agents our main finding is that annuity market imperfections decrease economic growth because less assets are necessary for consumption late in life in addition we find that both the quantitative and qualitative effects of annuity market imperfections are grossly overestimated in a partial equilibrium analysis because it disregards general equilibrium repercussions

optimal choice of health and retirement in a life cycle model abstract we examine within a life cycle model the simultaneous choice of health care and retirement together with consumption health tends to have an impact on retirement through morbidity determining earnings and the disutility of work and through longevity determining the need to accumulate retirement wealth conversely the age of retirement drives the demand for health care through the value of survival and the value of morbidity reductions we characterise the optimal relationship between health expenditure and retirement and apply our model to analyse the effects of moral hazard in the annuity market while moral hazard always induces excessive health investments and an excessive duration of working life it also triggers an excessive level of consumption if the impact of health on the disutility of work is sufficiently large we examine a transfer scheme and mandatory retirement as policies towards curtailing moral hazard numerical analysis illustrates the role of moral hazard in shaping the life cycle allocation

minimum wage effects throughout the wage distribution this paper provides evidence on a wide set of margins along which labor markets can adjust in response to increases in the minimum wage including wages hours employment and ultimately labor income not surprisingly the evidence indicates that low wage workers are most strongly affected while higher wage workers are little affected workers who initially earn near the minimum wage experience wage gains nevertheless their hours and employment decline and the combined effect of these changes on earned income suggests adverse consequences on net for low wage workers

is it really good to annuitize although rational consumers without bequest motives are better off investing exclusively with annuitized instruments in partial equilibrium we demonstrate the welfare effect of annuitization is ambiguous in general equilibrium on account of pecuniary externalities absent institutional constraints like prices and budgets the optimal consumption rule would have marginal utility increase at the preferential discount rate in a rational competitive equilibrium where households fully annuitize the growth rate of marginal utility will be the discount rate minus the interest rate resulting in a consumption profile that is too flat accidental bequests transfer wealth from the old to the young steepening the consumption profile and yielding a better equilibrium if households are restricted to keynesian consumption functions the optimal irrational equilibrium with standard preferences can replicate observed consumption and macroeconomic behavior and the equilibrium without annuities delivers higher utility than the equilibrium with annuities whereas preceding papers have merely hypothesized that households might engage in socially optimal yet irrational behavior the failure of households to annuitize is a real world example of this policymakers should not take steps to encourage more annuitization by the public

do minimum wage increases influence worker health this study investigates whether minimum wage increases impact worker health in the united states we consider self reported measures of general mental and physical health we use data on lesser skilled workers from the 1993 to 2014 behavioral risk factor surveillance survey among men we find no evidence that minimum wage increases improve health instead we find that such increases lead to worse health outcomes particularly among unemployed men we find both worsening general health and improved mental health following minimum wage increases among women these findings broaden our understanding of the full impacts of minimum wage increases on lesser skill workers jel i1 i11 i18

does the old age pension scheme improve household welfare evidence from india abstract as india s population has been ageing due to declines in fertility and mortality rates more policy emphasis has been placed on reducing poverty among the elderly the present study aims to examine the effect of indira gandhi national old age pension scheme ignoaps on household welfare indicators such as consumption expenditure income assets and poverty using the household longitudinal data based on the india human development survey in 2004 5 and 2011 12 we have applied the propensity score matching to build a counterfactual group and have used the propensity score weighted fixed effects model to eliminate time invariant unobservable household characteristics the results show that the ignoaps participation increased consumption expenditure food and non food expenditure and assets while reducing the household labour supply the sub sample estimations show that these effects are observed only when recipients are women however the results of difference in difference model imply that the poverty reducing effect deteriorated in 2011 12 after the government made several changes to programme specifications in 2007 this was likely because some households which accessed ignoaps after 2007 reduced the labour supply significantly while keeping the level of consumption

why nations become wealthy the effects of adult longevity on saving we analyze steady state and out of steady state effects of the transition in adult longevity on the national saving rate using historical data and international panel data the rise in adult life expectancy has a large and statistically significant effect on aggregate saving the effects have been especially pronounced in east asia because its mortality transition was very rapid gains in life expectancy are much more important than declines in child dependency population aging may not lead to lower saving rates in the future if life expectancy and the duration of retirement continue to increase

the distributional impacts of minimum wage increases when both labor supply and labor demand are endogenous we develop and estimate a one shot search model with endogenous firm entry and therefore zero expected profits and endogenous labor supply positive employment effects from a minimum wage increase can result as the employment level depends upon both the numbers of searching firms and workers welfare implications are similar to the classical analysis workers who most want the minimum wage jobs are hurt by the minimum wage hike with workers marginally interested in minimum wage jobs benefiting we estimate the model using cps data on teenagers and show that small changes in the employment level are masking large changes in labor supply and demand teenagers from well educated families see increases in their employment probabilities and push out their less privileged counterparts from the labor market this article has supplementary material online

microfinance and household poverty reduction new evidence from india the objective of the present study is to examine whether household access to microfinance reduces poverty using national household data from india treatment effects model is employed to estimate the poverty reducing effects of micro finance institutions mfis loans for productive purposes such as investment in agriculture or non farm businesses on household poverty levels these models take into account the endogenous binary treatment effects and sample selection bias associated with access to mfis despite some limitations such as those arising from potential unobservable important determinants of access to mfis significant positive effect of mfi productive loans on multidimensional welfare indicator has been confirmed the significance of treatment effects coefficients has been verified by both tobit and propensity score matching psm models in addition we found that loans for productive purposes were more important for poverty reduction in rural than in urban areas however in urban areas simple access to mfis has larger average poverty reducing effects than the access to loans from mfis for productive purposes this leads to exploring service delivery opportunities that provide an additional avenue to monitor the usage of loans to enhance the outreach

the costs of wrongful discharge laws we estimate the effects on employment and wages of wrongful discharge protections adopted by u s state courts during the last three decades we find robust evidence that one wrongful discharge doctrine the implied contract exception reduced state employment rates by 0 8 to 1 7 the initial impact is largest for female and less educated workers those who change jobs frequently while the longer term effect is greater for older and more educated workers those most likely to litigate by contrast we find no robust employment or wage effects of two other widely recognized wrongful discharge laws the public policy and good faith exceptions i introduction w hat is the price of protection this paper estimates the social costs in possibly lower employment and wages of common law protections designed to protect american workers from wrongful discharge economic the ory suggests that employment protection is a double edged sword it provides employment security to incumbent work ers but makes employers reluctant to hire leading to a less flexible labor market with potentially lower employment and wages it is frequently argued that the stagnant employment performance of many european economies during the 1980s and 1990s eurosclerosis can be attributed in part to the significant employment protection given european workers see lazear 1990 and blanchard and wolfers 1999 krueger and pischke 1998 provide a contrasting view among the obstacles to testing this hypothesis is the difficulty of making reliable inferences using cross country comparisons in this paper we study the effects of employment protec tion in the united states numerous scholars have examined the effects of american federal employment laws on em ployment and unemployment acemoglu and angrist 2001 deleire 2000 and jolls and prescott 2004 present evidence that the americans with disabilities act ada decreased employment of disabled persons oyer and schaefer 2000 2002 conclude that the federal civil rights act of 1991 increased the frequency of mass layoffs and raised the returns to experience for workers who have a downward sloping age litigation profile hahn todd and van der klaauw 2001 also evaluate the costs of federal antidiscrimination laws a major hurdle for each of these studies is that these federal statutes apply all at once to the entire country this makes it difficult to separate the effects of the statute from all other changes occurring simulta neously cf donohue 1998 donohue and heckman

using repayment data to test across models of joint liability lending theories rationalising joint liability lending are rich in implications for repayment rates we exploit this fact to test four diverse models we show that the models repayment implications do not always coincide for example higher correlation of output and borrowers ability to act cooperatively can raise or lower repayment depending on the model data from thai borrowing groups suggest that repayment is affected negatively by the joint liability rate ceteris paribus and social ties and positively by the strength of local sanctions and correlated returns further the relative fit of the adverse selection versus informal sanctions models varies by region

the existence uniqueness and optimality of the terminal wealth depletion time in life cycle models of saving under uncertain lifetime and borrowing constraint abstract in life cycle models of saving under uncertain lifetime and borrowing constraint the consumer s wealth must be depleted before the maximum lifetime this paper investigates the existence uniqueness and optimality of the terminal wealth depletion time it is proved that the optimal terminal wealth depletion time if such exists must be unique if the equation that determines the optimal terminal wealth depletion has multiple solutions then the location of the optimal solution will depend on the configuration of the solutions an optimality test is developed to verify whether a candidate solution for the terminal wealth depletion time is indeed optimal the paper introduces a method new to economics the dubovitskii milyutin adjoint equation to analyze the properties of the optimal control problem

disentangling the minimum wage puzzle an analysis of worker accessions and separations changes in the legislation in the mid 1980s in portugal provide remarkably good conditions for analysis of the employment effects of mandatory minimum wages as the minimum wage increased sharply for a very specific group of workers relying on a matched employer employee panel data set we model gross worker flows accessions and separations in continuing firms as well as in new firms and those going out of business using a count regression model applied to proportions employment trends for teenagers the affected group are contrasted to those of older workers before and after the raise in the youth minimum wage the major effect on teenagers of a rising minimum wage has been the reduction of separations from the employer which during the period under analysis has compensated for the reduction of accessions to new and continuing firms in this sense our results can reconcile some of the previous evidence in the empirical literature when analyzing the aggregate impact of the minimum wage on youth employment without decomposing it by type of worker flow jel d21 j23 j38

state level estimates of minimum wage effects research using state level data to estimate minimum wage effects on employment follows the textbook treatment of minimum wages assuming that minimum wages are binding and that labor markets are competitive we present an alternative method of estimating minimum wage effects using similar data that relaxes these assumptions using a disequilibrium approach applying this approach to the data and sample period used in many earlier state level studies suggests that simple state level reduced form estimates of minimum wage effects on employment depend on the sample used and may badly understate the disemployment effects of a binding minimum wage

the effect of minimum wages on youth employment in canada a panel study previous u s panel estimates of minimum wage effects have been criticized on the grounds that their identification rests on comparisons of low wage and high wage workers using canadian panel data for 1988 90 i compare estimates based on the traditional u s methodology with those based on samples of low wage workers exclusively the results would appear to vindicate the critics the minimum wage effect from the latter approach is virtually zero yet estimates from different subgroups of low wage workers indicate that there is a significant disemployment effect for those with longer low wage employment histories this highlights the heterogeneity within low wage workers and the importance of carefully defining the target group not solely based on workers wages

minimum wage effects on employment substitution and the teenage labor supply evidence from personnel data using personnel data from a large us retail firm i examine the firm s response to the 1996 federal minimum wage increase compulsory increases in average wages had negative but statistically insignificant effects on overall employment however increases in the relative wages of teenagers led to significant increases in the relative employment of teenagers especially younger and more affluent teenagers further analysis suggests a pattern consistent with noncompetitive models where the legislation affected mainly the wages of teenagers and so was only moderately binding it led both to higher teenage labor market participation and to higher absolute employment of teenagers

minimum wage shocks employment flows and labor market frictions we provide the first estimates of the effects of minimum wages on employment flows in the u s labor market identifying the impact using policy discontinuities at state borders we find that minimum wages have a sizable negative effect on employment flows but not stocks separations and accessions fall among affected workers we interpret our findings using a job ladder model in which minimum wage increases can reduce job to job transitions we find that a standard calibration of the model generates predicted relative magnitudes of the employment stock and flow elasticities that are very close to our reduced form estimates

a generalised model of monopsony this article presents a general but very simple model in which the supply of labour to an individual employer is not infinitely elastic but the employer can also raise employment by increasing expenditure on recruitment using this it is shown how that division between perfect competition and monopsony is whether there are diseconomies of scale in recruitment using a unique british data set containing information on both labour turnover costs and the number of recruits we present estimates that do suggest that there is an increasing marginal cost of recruitment debates about the desirability and consequences of labour market interventions like minimum wages trade unions welfare benefits hours restrictions and firing costs continue to be at the heart of debates about the way in which modern industrialised economies should be run is it best to have a relatively de regulated labour market the us being held up as a model by proponents of this view or can some regulation lead to better labour market outcomes with some northern european countries being held up as a model by this group debate about the merits of intervention is most commonly put in terms of a trade off between efficiency and equality with those economists favouring a more interventionist approach tending to be those who have a welfare function that puts greater weight on equality and or those who believe the efficiency cost of equality is relatively low

longevity and life cycle savings we add health and longevity to a standard model of life cycle saving and show that under plausible assumptions increases in life expectancy lead to higher savings rates at every age even when retirement is endogenous in a stationary population these higher savings rates are offset by increased old age dependency but during the disequilibrium phase when longevity is rising the effect on aggregate savings rates can be substantial we find empirical support for this effect using a cross country panel of national savings rates

social security liquidity and early retirement abstract this paper investigates the effect of social security on retirement decisions it argues that it is important to take realistic account of how recipients evaluate potential benefit flows the paper presents a simple retirement model in which liquidity constraints prompt individuals to use higher than market discount rates in evaluating future pension benefits as a consequence even an apparently actuarially fair early retirement benefit could on average discourage continued work using data on individual retirement decisions i find support for the argument that this phenomenon contributes to some of the observed increase in early retirement

the effects of health insurance and self insurance on retirement behavior this paper provides an empirical analysis of the effects of employer provided health insurance medicare and social security on retirement behavior using data from the health and retirement study we estimate a dynamic programming model of retirement that accounts for both saving and uncertain medical expenses our results suggest that medicare is important for understanding retirement behavior and that uncertainty and saving are both important for understanding the labor supply responses to medicare half the value placed by a typical worker on his employer provided health insurance is the value of reduced medical expense risk raising the medicare eligibility age from 65 to 67 leads individuals to work an additional 0 074 years over ages 60 69 in comparison eliminating 2 years worth of social security benefits increases years of work by 0 076 years

a reassessment of the new economics of the minimum wage literature with monthly data from the current population survey we estimate the employment effects of federal minimum wage increases using monthly current population survey cps data from 1979 through 1997 we find that the empirical differences in the new minimum wage literature based on cps data primarily can be traced to alternative methods of controlling for macroeconomic conditions we argue that the macroeconomic controls commonly included in models where no employment impact is found are inappropriate we consistently find a significant but modest negative relationship between minimum wage increases and teenage employment using alternative controls or allowing employer responses to the policy to occur with some delay

the effects of minimum wages on the distribution of family incomes a nonparametric analysis an oft stated goal of the minimum wage is to raise incomes of poor or low income families we present nonparametric estimates of the effects of minimum wages on the distribution of family income relative to needs in the united states although minimum wages increase the incomes of some poor families the evidence indicates that their overall net effect is if anything to increase the proportions of families with incomes below or near the poverty line it would appear that reductions in the proportions of families that are poor or near poor should not be counted among the potential benefits of minimum wages

health and other asset holdings despite clear evidence of correlations between financial and medical statuses and decisions most models treat financial and health related choices separately this article bridges this gap by proposing a tractable dynamic framework for the joint determination of optimal consumption portfolio holdings health investment and health insurance we solve for the optimal rules in closed form and capitalize on this tractability to gain a better understanding of the conditions under which separation between financial and health related decisions is sensible and of the pathways through which wealth and health determine allocations welfare and other variables of interest such as expected longevity or the value of health furthermore we show that the model is consistent with the observed patterns of individual allocations and provide realistic estimates of the parameters that confirm the relevance of all the main characteristics of the model

a model of job and worker flows we develop a model of gross job and worker flows and use it to study how the wages permanent incomes and employment status of individual workers evolve over time and how they are affected by aggregate labor market conditions our model helps explain various other features of labor markets such as the size and persistence of the changes in income that workers experience due to displacements or job to job transitions the length of job tenures and unemployment duration and the amount of worker turnover in excess of job reallocation we also examine the effects that labor market institutions and public policy have on the gross flows as well as on the resulting wage distribution employment and aggregate output in the equilibrium from a theoretical point of view we study the extent to which the competitive equilibrium achieves an efficient allocation of resources

employment effects of two northwest minimum wage initiatives i introduction the impact of a minimum wage on employment has long been of interest to economists such as stigler 1946 because it provides a relatively direct test of a conventional theoretical prediction that a binding increase in the minimum wage should reduce employment among low skilled workers although this theoretical prediction has not gone unchallenged as in lester 1946 early empirical work summarized in brown gilroy and kohen 1983 confirmed theoretical predictions using aggregate time series data for young workers which indicated that a minimum wage has a small negative employment effect by 1990 there was general consensus in the profession that minimum wage laws reduced employment among teenage and low wage workers albeit by a small amount ehrenberg 1995 and others have argued that subsequent empirical evidence provides less confidence in both the conventional view that the minimum wage lowers teenage or low skilled employment and that neoclassical theory can account for the relationship between them for example card and krueger 1995 show in a 30 study meta analysis that past time series results are sensitive to the specification and suggest that when appropriately specified the minimum wage has had no significant effects on employment over the last 25 yr alternatively neumark and wascher 1998 find negative employment effects of the minimum wage consistent with structural change using time series data and specifications that do not suffer from the biases present in earlier work cross sectional studies as in currie and fallick 1996 burkhauser couch and wittenburg 2000 and neumark and wascher 2001 also find mixed evidence of employment effects on low wage workers due to the minimum wage thus traditional empirical assessments of the minimum wage yield mixed evidence on the employment impact of the minimum wage the natural experiment methodology was introduced as an alternative to the cross sectional and time series approaches and exploits both the time series wage variation before and after the treatment of a minimum wage increase and the cross sectional wage variation between the treatment state and a control state that did not experience a change in the minimum wage for example card and krueger 1994 analyzed employment growth in 410 fast food restaurants in new jersey and pennsylvania before and after the 1992 minimum wage increase in new jersey from 4 25 to 5 05 they find no evidence linking the increase in the minimum wage to reduced employment in fast food restaurants both when comparing new jersey with pennsylvania and when comparing impacted versus nonimpacted restaurants in new jersey neumark and wascher 2000 reexamine the impact of the 1992 new jersey minimum wage increase using payroll data for hours worked by fast food employees and bureau of labor statistics bls eating and drinking employment data and find that the minimum wage significantly reduced employment in new jersey versus pennsylvania thus even studies that apply similar natural experiment techniques and data for a given minimum wage treatment as in katz and krueger 1992 deere murphy and welch 1995 kim and taylor 1995 and card and krueger 2000 can yield different conclusions regarding its employment effect our empirical analysis exploits a unique natural experiment initiated by oregon and washington voter initiatives that raised the minimum wage over three successive years 1997 1999 in oregon and 1999 2001 in washington by approximately 37 in both states following prior work we focus on the eating and drinking industry sic 58 which is a low wage industry that has been extensively studied in prior work due to an expectation of a binding minimum wage bls wage data available between 1997 and 2001 indicate that the successive minimum wage increases become increasingly binding for most but not all eating and drinking jobs at the lower end of the wage distribution

the effects of health wealth and wages on labour supply and retirement behaviour this paper estimates a life cycle model of labour supply retirement and savings behaviour in which future health status and wages are uncertain individuals face a fixed cost of work and cannot borrow against future labour pension or social security income the method of simulated moments is used to match the life cycle profiles of labour force participation hours worked and assets that are estimated from the data to those that are generated by the model the model establishes that the tax structure of the social security system and pensions are key determinants of the high observed job exit rates at ages 62 and 65 removing the tax wedge embedded in the social security earnings test for individuals aged 65 and older would delay job exit by almost one year by contrast social security benefit levels health and borrowing constraints are less important determinants of job exit at older ages for example reducing social security benefits by 20 would cause workers to delay exit from the labour force by only three months

the impact of group based credit programs on poor households in bangladesh does the gender of participants matter this paper estimates the impact of participation by gender in the grameen bank and two other group based micro credit programs in bangladesh on labor supply schooling household expenditure and assets the empirical method uses a quasi experimental survey design to correct for the bias from unobserved individual and village level heterogeneity we find that program credit has a larger effect on the behavior of poor households in bangladesh when women are the program participants for example annual household consumption expenditure increases 18 taka for every 100 additional taka borrowed by women from these credit programs compared with 11 taka for men

employment effects of the new german minimum wage evidence from establishment level microdata the authors present the first evidence on the consequences of the new statutory minimum wage in germany which was implemented on january 1 2015 using the iab establishment panel they identify e

spending retirement on planet vulcan the impact of longevity risk aversion on optimal withdrawal rates corrected july 2011 recommendations from the media and financial planners regarding retirement spending rates deviate considerably from utility maximization models this study argues that wealth managers should advocate dynamic spending in proportion to survival probabilities adjusted up for exogenous pension income and down for longevity risk aversion

uncertain lifetime risk aversion and intertemporal substitution abstract this paper describes a simple utility function for dynamic choice problems under uncertain lifetime preferences are time consistent and similar to selden s ordinal certainty equivalent hypothesis for yaari s model of consumption savings decisions holding intertemporal substitution fixed the consumption growth rate is increasing decreasing in the mortality rate if risk aversion is lower higher than under expected utility preferences

determinants of margin in microfinance institutions abstractmicrofinance institutions mfis lend to the poor however microfinance clients suffer from high interest rates a type of poverty penalty this article analyses the margin determinants in mfis a banking model has been adapted to microfinance this model has been tested using 9 year panel data some factors explaining bank margin also explain mfi margin with operating costs being the most important factor specific microfinance factors are donations and legal status as regulated mfis can collect deposits it has also been found that mfis operating in countries with a high level of financial inclusion have low margins

the impact of minimum wages on labour market transitions we investigate dierences in labour market transition rates in high versus low minimum wage regimes using canadian data spanning 1979 to 2008 the data include consistent questions on job tenure and reason for job separation for the whole period over the same time frame there were over 140 minimum wage changes in canada we nd that higher minimum wages are associated with lower hiring rates but also with lower job separation rates importantly the reduced separation rates are due mainly to reductions in layos occur in the rst 6 months of a job and are present for unskilled workers of all ages our estimates imply that a 10 increase in the minimum wage generates a 3 9 reduction in the layo rate we present a search and matching model that ts with these patterns and test its implications overall our results imply

a structural retirement model the life cycle model analyzed here constrains most work on the main job to be full time partial retirement entails a wage reduction and frequently a job change maximum likelihood estimates of utility function parameters are designed to incorporate information on the age of leaving full time work and the age of full retirement the model closely tracks retirement behavior including peaks in retirement activity at 62 and 65 the paper explores the relation of these peaks to nonlinearities in the budget constraint created by various retirement programs policy analyses based on this and on earlier models with simpler structures are compared the retirement choice is one of the more prominent manifestations of life cycle behavior the decision is the result of an interplay between an individual s preferences and a set of incentives which change in complicated ways as the individual progresses through his or her late 50 s and 60 s the purpose of this study is to formulate and estimate a structural model which incorporates in a fundamental way this interplay between lifetime preferences and incentives and to illustrate how such a model may be used to investigate retirement behavior a structural model of this type is essential for analyzing potential policy changes which can be expected to affect incentives in varying ways over a number of years in the life cycle the current study incorporates two structural features which have frequently been omitted from previous studies first the model requires that an individual who wishes to reduce work effort below full time must accept a reduced hourly wage rate in order to do so this reflects empirical evidence from micro data sets which indicates that around one third of older individuals engage in part time work at one time or another and that regardless of whether or not these older workers change jobs to obtain part time work they usually take wage cuts as compared to their previous full time work 2 the fact that an individual is willing to accept a lower wage rate in return for the opportunity to work fewer than full time hours contains important information about the preferences of the

revisiting the minimum wage employment debate throwing out the baby with the bathwater we revisit the minimum wage employment debate which is as old as the department of labor in particular we assess new studies claiming that the standard panel data approach used in much of the new minimum wage research is flawed because it fails to account for spatial heterogeneity these new studies use research designs intended to control for this heterogeneity and conclude that minimum wages in the united states have not reduced employment we explore the ability of these research designs to isolate reliable identifying information and test the untested assumptions in this new research about the construction of better control groups our evidence points to serious problems with these research designs we conclude that the evidence still shows that minimum wages pose a tradeoff of higher wages for some against job losses for others and that policymakers need to bear this tradeoff in mind when making decisions about increasing the minimum wage

rethinking the effects of microcredit on household welfare in cambodia abstractthis article analyses the effects of microcredit on household welfare in terms of household expenditure per capita in cambodia with data from the cambodia socio economic survey carried out in 2014 the analysis describes the effects via formal and informal lending sectors accounting for endogenous selection bias arising from unobserved factors and for structural differences between borrowers and non borrowers in terms of expenditure functions the findings suggest that microcredit in both sectors reduces household expenditure

social security growth and welfare in overlapping generations economies with or without annuities we examine the impact of a stylized pay as you go paygo social security program in an economy of overlapping generations with equilibrium growth we adopt realistic mortality and other demographic assumptions and allow for the presence or absence of life annuities in all cases steady state economies with paygo social security programs grow more slowly than those without also we find that lifetime expected utilities are lower for existing and future households in steady state economies with social security we also report the effect of social security on the age profile of consumption and explore the effects of longer life expectancy compensating social security program changes and capital subsidies

are there lasting impacts of aid to poor areas abstract the paper re visits the site of a large world bank financed rural development program in china 10 years after it began and four years after disbursements ended the program emphasized community participation in multi sectoral interventions including farming animal husbandry infrastructure and social services data were collected on 2000 households in project and non project areas spanning 10 years a double difference estimator of the program s impact on top of pre existing governmental programs reveals sizeable short term income gains that were mostly saved only small and statistically insignificant gains to mean consumption emerged in the longer term though in rough accord with the average gain to permanent income the use of community based beneficiary selection greatly reduced the overall impact given that the educated poor were under covered the main results are robust to corrections for various sources of selection bias including village targeting and interference due to spillover effects generated by the response of local governments to the external aid

the welfare value of fda s mercury in fish advisory a dynamic reanalysis assessing the welfare impact of consumer health advisories is a thorny task recently shimshack and ward 2010 studied how u s households responded to fda s 2001 mercury in fish advisory they found that the average at risk household reduced fish consumption by 21 resulting in a 17 reduction in mercury exposure at the cost of a 21 reduction in cardioprotective omega 3 fatty acids based on a static assessment of the health costs and benefits shimshack and ward concluded that the advisory policy resulted in an overall consumer welfare loss in this note we propose a dynamic assessment that links the long term cardiovascular health effects of the advisory to life cycle consumption we find that under reasonable assumptions the welfare loss might be much larger than suggested our analysis highlights the importance of accounting for dynamic effects when evaluating persistent changes in exposure to environmental health risks

how social security and medicare affect retirement behavior in a world of incomplete markets this paper provides an empirical analysis of how the u s social security and medicare insurance system affect the labor supply of older males in the presence of incomplete markets for loans annuities and health insurance we estimate a detailed dynamic programming dp model of the joint labor supply and social security acceptance decision focusing on a sample of males in the low to middle income brackets whose only pension is social security the dp model delivers a rich set of predictions about the dynamics of retirement behavior and comparisons of actual vs predicted behavior show that the dp model is able to account for wide variety of phenomena observed in the data including the pronounced peaks in the distribution of retirement ages at 62 and 65 the ages of early and normal eligibility for social security benefits respectively we identify a significant fraction of health insurance constrained individuals who have no form of retiree health insurance other than medicare and who can only obtain fairly priced private health insurance via their employer s group health plan the combination of significant individual risk aversion and a long tailed pareto distribution of health care expenditures implies that there is a significant security value for these individuals to remain employed until they are eligible for medicare coverage at age 65 overall our model suggests that a number of heretofore puzzling aspects of retirement behavior can be viewed as artifacts of particular details of the social security rules whose incentive effects are especially strong for lower income individuals and those who do not have access to fairly priced loans annuities and health insurance

uncertain lifetime and intertemporal choice risk aversion as a rationale for time discounting this article makes explicit the links between preferences over lotteries on length of life and intertemporal choice it shows that the approach used by traditional life cycle models to account for uncertain survival corresponds to a strong assumption of risk neutrality with respect to length of life relaxing such an assumption leads us to develop a more general formulation of lifetime utility in which time discounting is directly related to preferences over length of life exponential and hyperbolic discounting are found to result in a first approximation from constant and hyperbolic risk aversion with respect to length of life

the impact of microcredit on child education quasi experimental evidence from rural china abstractthis article assesses causal effects of formal microcredit on children s educational outcomes by using household panel data 2000 and 2004 in north west rural china the unobservables between borrowers and non borrowers are controlled in static and dynamic regression discontinuity designs the static analysis reveals significant positive impact of microcredit on schooling years in 2000 only and no influence on academic performance for either wave the dynamic analysis shows progressive treatment effects on both longer schooling years and higher average scores formal microcredit improves education in the longer term compared to the short term and hence may help relaxing the grip of educational poverty traps

the benefits and costs of microfinance evidence from bangladesh abstract using the latest developments from the evaluation literature namely the technique of matching this paper shows a positive but lower than previously thought effect of microfinance on expenditure per capita supply of labour and level of school enrolment for boys and girls for instance participants spend 3 per cent more on average than non participants in control villages this paper also takes into account repayment delays to calculate the cost of credit provision it shows how a better investigation at the individual level of the benefits brought and the cost borne could help microfinance institutions to better select their customers jel classification c14 d10 g21 i38 o12 o16