wages sorting on skill and the racial composition of jobs wages for black and white workers are substantially lower in occupations with a high density of black employees following standard controls such correlations can exist absent discrimination or as a result of discrimination in wage level equations partial correlations fall sharply after controlling for occupational skills longitudinal estimates accounting for worker heterogeneity indicate little wage change associated with changes in racial composition results support a quality sorting rather than discrimination explanation with racial density serving as an index of unmeasured skills discrimination reflected in racial wage gaps occurs within occupations or across occupations in a manner uncorrelated with racial composition

generating conditional expectations from models with selectivity bias abstract this paper discusses how conditional expectations should be generated from models with sample selectivity we argue that the conventional method ignores relevant and available information and produces unreliable results an alternative approach is suggested and the empirical example of black white wage differentials is presented

the effects of deregulation de unionization technology and human capital on the work and work lives of truck drivers this paper investigates the sources of wage decline among truck drivers the authors first present an overview of the work and work life of truck drivers and then take two complementary approaches to disentangling the forces that reduced driver earnings the earnings of truck drivers fell by 21 between 1973 and 1995 using current population survey data the authors find that deregulation accounted for one third of the decline in drivers wages with a larger negative effect for non union workers the other two thirds of the decline was due to economic forces that broadly affected the blue collar economy using unique survey data the authors explore the effects of factors frequently cited as sources of blue collar wage decline this analysis indicates that only one new technology satellite communication systems had meaningful effects on drivers earnings which rose as a consequence of superior efficiency and work intensification union membership remains an important determinant of wages the authors conclude that the primary sources of wage decline and increased wage inequality have been deregulation de unionization and a declining manufacturing wage

payment schemes and gender in germany the authors estimate the determinants of five types of variable payment schemes using panel data on german establishments in 1994 and 1996 women were disproportionately included in schemes based on individual productivity and on profit sharing but not in those based on work group productivity this pattern seems inconsistent with the claim that women are sorted due to their shorter expected tenure instead the authors argue the critical issue may be that women have a greater need for flexibility between work and home than men do collective bargaining coverage and other industrial relations variables are shown to be influential determinants interacting with gender

what went wrong the erosion of relative earnings and employment among young black men in the 1980s this paper shows a widening in black white earnings and employment gaps among young men from the mid 1970s through the 1980s earnings gaps increased most among college graduates and in the midwest while gaps in employment population rates grew most among dropouts we attribute the differential widening to shifts in demand for subgroups due to shifting industry and regional employment the falling real minimum wage and deunionization the growing supply of black to white workers that was marked among college graduates and to increased crime among dropouts the different factors affecting subgroups highlight the economic diversity of black americans

factor substitution price elasticity of factor demand and returns to scale in police production evidence from michigan budget problems facing many state and local governments together with declining public sector subsidies have forced these governments to search for more efficient ways of providing services such as public safety and public health the provision of public safety like many other service industries is labor intensive with personnel cost usually accounting for between 50 and 70 percent of total cost the principal labor input is police officers the relatively large increases in police wages partly aided by arbitration thus puts increased pressures on city budgets apparently efforts at reducing cost of providing public safety have included attempts at factor substitution for example the last decade has seen an increasing use of civilian employees mostly in administration so that the ratio of police officers to civilians has declined in addition there has been a decline in the use of sidewalk beats by some police departments and an increase in the use of patrol cars for surveillance evidently there is a possible output as well as a substitution effect in the demand for these factors

male labour force participation following illness or injury this paper develops a model of the disabled individual s labour force participation decision following illness or injury and confronts it with data on the financial consequences of ill health a utility function is specified which allows for the effect of changes in health on work leisure preferences and is evaluated in relation to a household budget constraint estimation is through maximization of the appropriate likelihood function correcting for self selection bias within a switching regression model results are presented showing significant effects of financial variables on participation and these are seen to vary with age disability and income

on the relevant elasticity estimates for cost structure analyses of the trucking industry the effects of output qualities on costs of trucking firms could be evaluated at a given number of ton kilometers or at a given number of shipments this note shows that false interpretations of potential output qualities effects could occur when these effects are evaluated at a given number of ton kilometers copyright 1990 by mit press

comparative advantage learning and sectoral wage determination we develop a model in which a worker s skills determine the worker s current wage and sector the market and the worker are initially uncertain about some of the worker s skills endogenous wage changes and sector mobility occur as labor market participants learn about these unobserved skills we show how the model can be estimated using nonlinear instrumental variables techniques we apply our methodology to study wages and allocation of workers across occupations and industries using individual level panel data from the national longitudinal survey of youth we find that high wage sectors employ high skill workers and offer high returns to workers skills

the gender wage gap among recent post secondary graduates in canada a distributional approach using the national graduates survey we examine the trends in the gender wage gap among recent post secondary graduates in canada between 1988 and 2007 female graduates earn on average 6 14 less than males during the period two to five years after graduation decompositions show that observable personal characteristics and job attributes can explain only a small portion of the wage gap we also find that men earn more than women at every point of the distribution interestingly the wage difference shrank in the lower half of the distribution in recent years while it increased in the upper half l ecart salarial entre les sexes chez les nouveaux diplomes postsecondaires une approche distributionnelle a l aide de l enquete nationale aupres des diplomes nous examinons les tendances dans l ecart salarial entre les sexes chez les nouveaux diplomes postsecondaires au canada entre 1988 et 2007 les femmes diplomees gagnent en moyenne de 6 a 14 moins que les hommes durant les 2 a 5 ans suivant l obtention du diplome des decompositions montrent que les caracteristiques personnelles et les attributs de l emploi observables ne peuvent expliquer qu une petite partie de l ecart salarial nous trouvons aussi que les hommes touchent plus que les femmes a chaque point de la distribution salariale de maniere interessante la difference de salaire a diminue dans la moitie inferieure de la distribution lors des annees recentes alors qu elle a augmente dans la moitie superieure

customer discrimination and employment outcomes for minority workers this paper investigates the effects of customer discrimination on the employment and earnings of minorities particularly blacks data are used from a new survey of employers in four large metropolitan areas in the united states our results show that the racial composition of an establishment s customers has sizable effects on the race of who gets hired particularly in jobs that involve direct contact with customers and in sales or service occupations race of customers also affects wages with employees in establishments that have mostly black customers earning less than those in establishments with mostly white customers

the risk and cost of job loss in canada 1978 2008 we assess the risk and cost of worker displacement in canada over the last three decades we show that neither the risk of job loss nor the short term earnings losses of displaced workers trended upwards during that period however short term earnings losses of workers displaced from manufacturing increased in recent years as a smaller proportion found a post displacement job in that sector in line with stevens 1997 and couch and placzek 2010 we find that high seniority workers and individuals with stable labour market attachment experienced five years after displacement earnings losses that ranged between 10 and 18 le risque et le cout d une perte d emploi au canada 1978 2008 on evalue le risque et le cout d un deplacement de travailleur au canada au cours des trois dernieres decennies on montre que ni le risque d une perte d emploi ni les gains perdus a court terme par les travailleurs deplaces n ont eu une tendance a la hausse au cours de cette periode cependant les pertes de gains a court terme des travailleurs deplaces dans le secteur manufacturier ont augmente au cours des annees recentes alors qu une proportion plus faible de ces deplaces ont retrouve un emploi dans ce secteur en coherence avec les resultats de stevens 1997 et de couch et placzek 2010 on decouvre que les travailleurs avec beaucoup de seniorite et les personnes avec un attachement stable au marche du travail ont enregistre cinq ans apres un deplacement des pertes de gains de l ordre de 10 a 18

collective bargaining after deregulation do the teamsters still count using data from the american trucking associations and a 1991 telephone survey of 223 major firms in the general freight segment of the trucking industry sic 4213 the author describes the restructuring of the trucking industry that occurred following economic deregulation that began in 1977 and examines how that restructuring affected industrial relations outcomes such as wages and union strength he finds that both market concentration and competition increased after 1977 he also concludes that regulatory restructuring led the general freight industry to divide into two sectors one handling full truckload shipments shipments of 10 000 pounds or more and one handling less than truckload shipments the teamsters union lost bargaining power in the truckload sector but it retained much of its bargaining power within the less than truckload sector

contractual form and market thickness in trucking a central proposition of the transaction costs literature is that firms will substitute more complicated contractual arrangements for simple spot arrangements when transactions involve relationship specific investments i investigate this proposition by testing whether simple spot arrangements are less common when local trucking markets are thin i find that doubling the thickness of the market increases the likelihood that simple spot arrangements govern transactions by about 30 for long hauls i find weaker evidence of relationships between local market thickness and contractual form for short hauls hauls for which quasi rents are particularly small contracts protect quasi rents over a surprisingly large range but they play a less important role as quasi rents decrease

economies of scale and economies of scope in multiproduct financial institutions a study of british columbia credit unions this paper investigates the production technology facing computerized credit unions in canada a full system of translog cost equations is estimated in order to test for economies of scale economies of scope and other production characteristics in a multiproduct context the regression results indicate that most of the credit unions in our sample experience significant increasing returns to scale as they expand their level of output there is also evidence of cost complementarity or economies of scope in their mortgage and other lending activities as a result legislation which limits the ability of credit unions to grow and diversify will likely raise the operating costs of this important group of financial institutions additional structural tests of the most general translog specification suggest that none of the restrictive production conditions commonly imposed by other researchers using cobb douglas and ces specifications provide a valid representation of credit union technology the results of many earlier studies are therefore open to question this paper presents a number of structural tests of the production technology facing large computerized credit unions in canada a full system of translog cost equations is estimated using detailed cross sectional data on british columbia credit unions the parameter estimates obtained from our multiproduct specification allow us to test for economies of scale economies of scope and factor substitution unlike many earlier studies the present paper introduces the various outputs as separate variables instead of crudely proxying them with a single output measure such as total assets the total number of loans or the number of depositors by explicitly recognizing the multiproduct nature of the intermediation process we are able to address more interesting production questions and remove some of the bias caused by misspecification and measurement error in simpler approaches the flexible translog specification allows us to estimate the sensitivity of costs to proportionate increases in all outputs economies of scale as well as the cost savings firms realize by producing several outputs jointly rather than specializing in the production of one economies of scope the test results reported in the latter part of the paper suggest that increasing returns to scale exist in almost all of the credit unions in our sample though

racial earnings differentials and performance pay this paper presents an information model in which workers receiving output based pay experience less racial earnings discrimination than those receiving time rates and supervisory evaluations tests using the national longitudinal survey of youth reveal no racial wage differential among male workers paid output based pay while confirming a significant differential among those paid time rates in addition the racial wage differential among those receiving bonus pay usually based on supervisory evaluations tends to be larger than for those not receiving such bonuses while both racial earnings differences and payment methods have generated enormous literatures the two subjects rarely interact this paper argues that the observed racial earnings gap should be narrower among those receiving output based pay such as piece rates and commissions when discriminating in earnings the intensity of racial preferences must be greater when an owner or manager confronts a standardized measure of productivity than when effort is subjectively evaluated and those evaluations are used to set earnings more important use of a standardized measure of productivity makes the practice of discrimination more transparent and this improved information increases the probability of detection the increased probability of detection raises the expected cost of racial discrimination and should be associated with a reduction in its extent our empirical estimates confirm that output based pay is associated with reduced racial earnings discrimination

prejudice and wages an empirical assessment of becker s the economics of discrimination we test the predictions from becker s 1957 seminal work on employer prejudice and find that relative black wages a vary negatively with the prejudice of the marginal white in a state b vary negatively with the prejudice in the lower tail of the prejudice distribution but are unaffected by the prejudice of the most prejudiced persons in a state and c vary negatively with the fraction of a state that is black our estimates suggest that one quarter of the racial wage gap is due to prejudice with nontrivial consequences for black lifetime earnings

male white black wage gaps 1979 1994 a distributional analysis 1 introductionnumerous studies show that during the 1980s the mean white black wage gap among new entrant 0 10 years of potential experience males expanded 1 juhn murphy and pierce 1991 jmp attribute the mean gap s expansion to a widening of the overall u s wage distribution caused by a host of economy wide race neutral changes that led to labor demand shifts toward better educated and better skilled workers regardless of race because african americans tend to be at lower levels of the overall skill distribution the shifts adversely impacted african american men more than white men leading to an expansion in the mean wage gap to arrive at this conclusion jmp decompose the expansion in the mean new entrant wage gap into four components the first two components measure the wage gap s increase because of a widening in observable racial differences in measured characteristics and their prices for example educational attainment and the returns to education the third component captures the contribution of growing racial discrimination and widening differences in unmeasured skills to the wage gap s expansion this term s contribution is measured by the drop in the mean percentile rank of blacks in the white residual wage distribution the fourth component identifies the role of increases in the prices of unmeasured skills and is measured by the increase in the variance of the white residual wage distribution when applied to the march annual demographic files of the current population survey jmp find that from 1979 to 1987 increases in the price of unmeasured skills explain all of the new entrant mean wage gap s expansion indicating that factors that adversely impacted less skilled workers regardless of race are the primary cause of the wage gap s expansion in related work reardon 1997 uses a national sample of white and african american men from the 1980 and 1990 decennial censuses and shows that the mean racial wage gap s expansion is caused by increased variance in the distribution of residual wages generated by labor demand shifts toward high skilled whites and away from medium skilled whites and high skilled african american men the wage gap expands because high skilled african american men earn wages that are similar to those of whites in the middle and upper third of their wage distribution the labor demand shifts led to a stretching or increased variance in the wage distribution that favored high skilled whites relative to high skilled african americans and medium skilled whites this paper makes several contributions to the literature on racial wage gaps and the technical literature on wage decompositions first i examine whether jmp s 1991 results hold up when the analysis is disaggregated by experience and educational attainment this is an important extension for two reasons bound and freeman 1992 rodgers 1997a and others have found that the racial wage gap among high school graduates and particularly among college graduates expanded significantly after the late 1970s over the same time period the variance of wages within these educational categories increased second it is important to determine the extent to which racial inequality that was generated while a cohort was a new entrant persists as it ages the paper s technical innovation is the development of a distribution or skill specific decomposition that identifies whether the stretching of the white wage distribution uniformly contributes to an expansion in racial inequality at all skill levels or quantiles of the wage distribution or whether the contribution of the wage distribution s stretching is specific to a skill level for example does the increase in the price of unmeasured skills explain a greater portion of the increase in the racial wage gap between high skilled african americans and whites than it does between medium skilled african americans and whites

exploring hospital production relationships with flexible functional forms this paper estimates a multiproduct variable cost function using data on a sample of california hospitals the results provide useful insights into the advantages and disadvantages of flexible functional forms for cost analysis the translog function appears to provide reasonable estimates of marginal costs when evaluated at or near the approximation point of the function the estimated function performs less satisfactorily however when evaluated outside this range the paper s results do not provide strong evidence of either ray scale economies or of weak cost complementarities there is some evidence however that the degree of scale economies may be underestimated

worker quality and labor market sorting abstract we test the hypothesis that labor market sorting into outcomes normally associated with wage premia e g incentive pay coverage urban dwelling employment in large firms marriage and union coverage is related to a series of non standard worker quality measures

performance related pay and gender wage differences we study the impact of performance related pay prp on gender wage differences using finnish linked employer employee panel data controlling for unobserved person and firm effects we find that bonuses increase women s earnings slightly less than men s but the economic significance of the difference is negligible piece rates and reward rates however tend to increase gender wage differentials thus the nature of a prp plan is important for gauging the impact of prp on gender wage differentials a comparison with ols results shows the importance of controlling for an unobserved person and firm effects

bridging the gender gap identifying what is holding self employed women back in ghana rwanda tanzania and the republic of congo quantile decomposition methods are used to study the determinants of the gender gap in self employment earnings across the earnings distribution of four sub saharan countries the republic of congo

performance pay and the white black wage gap we show that the reported tendency for performance pay to be associated with greater wage inequality at the top of the earnings distribution applies only to white workers this results in the white black wage differential among those in performance pay jobs growing over the earnings distribution even as the same differential shrinks over the distribution for those not in performance pay jobs we show that this remains true even when examining suitable counterfactuals that hold observables constant between whites and blacks we explore reasons behind our finding focusing on the interactions between discrimination unmeasured ability and selection

race and employment outcomes evidence from nba coaches we study the impact of management diversity on employment outcomes using data on nba head coaches that includes information on the race of each coach and his supervisor we find that a supervisor is more likely to hire a coach of his own race we also find that black coaches are less likely to be rehired to a second job within three years than their white counterparts and that a head coach s race affects the quality of the opportunities he is offered these findings are stronger for first time coaches than experienced coaches suggesting that observable information on performance mitigates bias jel j0 j4 j7

an analysis of returns to scale in public production with an application to fire protection abstract this paper analyzes returns to scale in public production existing studies fail to differentiate among three dimensions of scale service quality the level of governmental activity and the number of people served a fourth dimension economies of scope is need for agencies that provide multiple services this paper provides a formal definition of returns to scale for each dimension this framework is applied to fire protection using a translog cost function with two services fire prevention and fire suppression the results indicate economies of scope increasing returns to quality scale and constant returns to population scale

examining equality between public and private sector wage distributions i introduction institutional political and economic factors all contribute to the determination of public sector wages for example the public sector is almost the only place in many advanced economies where unions continue to have a significant presence and an influential voice in setting wages and conditions of work political factors such as desiring to be a good employer may also influence the public sector wage structure as a good employer governments may offer low skilled workers higher rates of pay than they might get in the private sector on the other hand the public sector may be adverse to paying very skilled workers high rates of pay if the public does not like to see public sector workers earning too much economic factors such as spending and tax receipt limits can also affect the wage structure in the public sector all of these factors could make the public sector labor market be less efficient than that of the private sector from an economic perspective if government workers are paid more than private sector workers ceteris paribus then taxes are being wasted if private sector workers are paid more than government workers governments cannot recruit and retain appropriately skilled and productive workers to make the wage structures comparable many countries use surveys to ascertain the prevailing earnings levels for jobs in the private sector that are similar to public sector jobs however as fogel and lewin 1974 and gregory 1990 point out these survey methods are fraught with biases that may affect comparability of wages indeed there is little empirical evidence that wages between the two sectors are equal bender 1998 and gregory and borland 1999 survey the current literature on public private wage differentials and report that most studies find that central governments pay more on average compared to the private sector even after controlling for differences in the productive characteristics of workers furthermore as elliott et al 1999 find comparability in pay is currently important in the debates over public sector pay reform particularly in europe the institutional and political factors outlined above are waning in importance and economic considerations are seemingly coming to the fore because of perceptions of the overpayment of public sector workers and the desire to cut government wage bills politicians in these countries are devising policies to align average rates of pay by slowing the relative rate of public sector wage growth the policies should be different however if wage distributions are not the same indeed there is some evidence that the distributions differ as found in the double imbalance concept articulated by schager 1993 katz and krueger 1993 and elliott and duffus 1996 this imbalance is characterized by public sector workers at the lower end of the occupational hierarchy receiving the largest wage premia and workers at the upper end earning less than their private sector counterparts if the distributions are incomparable ceteris paribus mandating equal average rates of pay growth will not ensure comparability policies aimed at realigning wage structures at the ends of the distribution should then be followed to promote comparability this article compares public and private sector wage distributions and examines the extent to which focusing exclusively on differences in mean wages obscures the true nature of the wage relativities data from the british social change and economic life initiative sceli are employed to investigate comparability this data set is well suited for a comparability study given the range of personal and job characteristics that control for differences in public and private sector jobs moreover the data were collected in 1986 before substantial reform of public sector pay in the united kingdom reviewed in bender and elliott 1999 this offers a test to see if the reform policies were appropriate to promote wage comparability

regulatory reform and technical change new evidence of scale economics in trucking economists have long argued against the regulation of motor carriers in the united states because the industry has been considered to be competitive in nature federal control of trucking has produced inefficiently high rates as well as costs advocates of regulatory reform have foreseen benefits accruing to shippers and consumers in general as greater rate freedom the entry of new firms and the removal of regulatory constraints lead motor carriers to reduce costs 16 and lower prices 17 many of these projected benefits were premised on the perceived competitive market structure of the trucking industry these perceptions have been largely supported by pre deregulation cost studies of general freight carriers which have found evidence of either constant returns to scale or diseconomies of scale friedlaender and wang chiang 8 find that for 20 interregional carriers over 1965 73 the typical firm operating at the sample mean is subject to mild scale diseconomies in a subsequent study of multiproduct economies of scale using 1976 proprietary data they 14 obtain the same basic results the typical firm has constant returns to scale while the representative large firm operates under moderate diminishing returns daughety nelson and vigdor 4 also find mild decreasing returns to scale for a panel of firms spanning 1953 58 in another study over 1974 79 friedlaender and bruce 6 find slight economies of scale for the typical firm based on simulations with the largest and smallest firms in their sample they suggest that over time large carriers have become more characterized by scale economies and small carriers by scale diseconomies however their evidence is far from clear cut given this conventional wisdom that the technology of the less than truckload segment of this industry was constant returns to scale before deregulation few if any economists doubted the desirability of the motor carrier act of 1980 the purpose of this paper is to determine empirically whether the sweeping legislative changes were justified on solely economic grounds it is possible that previous cost studies are biased as a consequence of the regulatory constraints facing the firms has deregulation itself corrected for distortions created by the regulatory environment and thus produced changes in the production choices of trucking companies was friedlaender and spady s 7 contention that truckload carriers may have experienced regulatory rather than technology based increasing returns to scale correct if so perhaps past results for general freight carriers are similarly due to regulation however in this case the reason may be regulatory

economies of scale and scope as an explanation of merger and output diversification activities in the health maintenance organization industry this paper tests for the existence and magnitude of economies of scale and scope as possible explanations for the recent observed trends in increasing health maintenance organization hmo scale through merger and acquisition and scope through greater participation in public enrollee markets using firm level data from a sample of california hmos for the time period 1986 1992 the results suggest that economies of scale provide a strong justification for mergers only in the case of relatively small hmos i e those with fewer than 115 000 enrollees and economies of scope do not explain the increasing hmo enrollment of public enrollees

a distributional analysis of the gender wage gap in bangladesh this article empirically investigates the gender wage gap in bangladesh during the period 2005 2009 applying unconditional quantile regression models the article demonstrates that women are paid less than men throughout the wage distribution and the gap is higher at the lower end of the distribution discrimination against women is the primary determinant of the wage gap the article also demonstrates that the observed gender wage gap is likely to be underestimated if we ignore selection in full time employment a number of policy implications are discussed

why do minority men earn less a study of wage differentials among the highly educated en in several minority groups in the united states have wages that are substantially lower than those of the benchmark majority group non hispanic white men several generations of labor economists have sought to understand the forces that drive these disparities this research program is potentially important for the purpose of determining whether minority wage gaps are likely to be narrowed more effectively by increasing enforcement of antidiscrimination laws or by implementing policies that reduce inequity in educational opportunity existing work shows large racial and ethnic differences in premarket factors especially formal schooling and suggests that these differences play a key role in shaping wage differences one example is trejo 1997 who finds that third and higher generation mexican american men earn 21 less than non hispanic white men approximately three quarters of the earnings gap is found to be attributable to the mexican americans relative youth and to differences in english language proficiency and years of schooling a second example is neal and johnson 1996 who find that black men earn 24 less than do non hispanic white men differences in schooling account for only about one fifth of this gap when the authors condition on performance on a basic verbal and math skills test the armed forces qualification test afqt though the differential between wages of blacks and whites declines to approximately onethird of its unadjusted level 1 trejo s 1997 study is a nice example of the traditional approach to studying race ethnicity wage gaps traditional in the sense that the explanatory variables in the study are conventional objective measures of human capital such as years of schooling and language ability neal and john

labour force participation by disabled males in canada the disabled are not necessarily unemployed although about a quarter of them report they are completely prevented from working a disabled person s decision to work or not depends on a variety of psychological social and economic as well as health factors this paper asks if canadian disability related insurance schemes discourage work it models and measures the impact of disability benefits on the work choice of disabled prime age males it finds that they amount to a significant work disincentive but better yet they likely save many disabled persons from unsuitable and or undesirable jobs

demand side changes and the relative economic progress of black men 1940 90 this article uses census data from 1940 to 1990 to examine whether the hypotheses advanced for the absence of economic progress of black men relative to white men during the 1980s are consistent with the long run trends the findings indicate that skill biased technological change explains more than changes in industrial composition both in the long run as well as in the 1980s moreover increased competition from women and immigrants does not explain the recent slowed progress of black men instead the evidence suggests that middle skilled white men may be an important source of increased competition

separate and unequal in the labor market human capital and the jim crow wage gap competing explanations for the long standing gap between black and white earnings attribute different weight to wage discrimination and human capital differences using new data on local school quality we find that human capital played a predominant role in determining 1940 wage and occupational status gaps in the south despite entrenched racial discrimination in civic life and the lack of federal employment protections the resulting wage gap coincides with the higher end of the range of estimates from the post civil rights era we estimate that truly separate but equal schools would have reduced wage inequality by 29 48

black white wage inequality in the 1990s a decade of progress mary c daly using current population survey data we find that the gap between the wages of black and white males declined during the 1990s at a rate of about 60 percentage point per year wage convergence was most rapid among workers with less than 10 years of potential experience with declines in the gap averaging 1 40 percentage points per year using standard decomposition methods we find that greater occupational diversity and reductions in unobserved or residual differences are important in explaining this trend general wage inequality tempered the rate of wage convergence between blacks and whites during the 1990s jel j15 j31 i introduction following the passage of the civil rights act of 1964 and other measures aimed at reducing labor market discrimination during the 1960s the differential in average weekly wages between black and white men in the united states narrowed substantially among male workers aged 18 64 the black white wage gap fell from 50 in 1967 to 30 in 1974 or by about 1 per year 1 after 1974 however the proportional difference in black and white wages remained essentially constant at 30 through the end of the 1980s following more than a decade of stasis the black white wage gap once again began to decline during the 1990s narrowing at an average annual rate of about 60 percentage point per year a great deal of past research has focused on why the black white wage gap did not continue to decline following the initial progress made through the mid 1970s see for example bound and freeman 1992 and juhn et al 1991 hereafter jmp the results point to a number of important factors including shifts in industry demand greater occupational crowding relative deterioration of unobservable skills among blacks and rising overall male wage inequality see altonji and blank 1999 for a detailed review of this literature in this article we investigate the role that each of these factors played in the wage convergence observed in the 1990s we begin by documenting the recent progress in black white wage convergence placing the 1990s in the context of the past 30 years following previous researchers we then use standard decomposition techniques to examine the role of individual characteristics the employment structure and overall male wage inequality in reducing the racial gap in earnings during the decade of the 1990s we find that greater occupational diversity and reductions in unobserved or residual differences are important in explaining this trend general wage inequality tempered the rate of wage convergence between blacks and whites during the 1990s ii data we use data from the march current population survey cps for the years 1969 1999 as administered by the u s census bureau for the u s bureau of labor statistics these files provide information on earnings hours and related variables for the calendar year prior to the survey date thus our analyses apply to income years 1968 1998 in the formal decomposition analysis we focus on three periods 1968 1979 1979 1989 and 1989 1998 these years span our sample and generally coincide with three business cycles our sample consists of black and white males ages 18 64 who participated in the labor force at least 39 weeks worked at least 1 week during the year and usually worked full time workers who are enrolled in school are excluded from the analysis throughout the analysis we focus on two groups our full sample and men with less than ten years of potential experience i e min age education 6 age 18 2 our empirical analysis focuses on weekly earnings calculated as the ratio of annual earnings to weeks worked during the year weekly earnings are deflated using the personal consumption expenditure deflator from the national income and product accounts to avoid problems associated with changes in cps top coding procedures over the years our sample excludes individuals in the top and bottom 1 of the weekly earnings distribution

deregulation and scale economies in the u s trucking industry an econometric extension of the survivor principle over the past three decades there has been much progress in the analysis of costs production and scale economies in u s industries including transportation and yet it can also be argued that accounting data on which all such cost and production function estimation is based do not give us a full story regarding scale economies in an industry among those who made this argument most forcefully was george stigler in a seminal article published in 1958 to provide evidence on scale economies with less use of accounting data stigler developed what he called the survivor technique a model that others have used in subsequent studies 1 the present article extends the survivor technique so as to make it a part of an econometric probit model somewhat akin to cost and production functions as they are estimated statistically but preserving the essential features of the survivor model developed by stigler in the 1950s the most important advantage of this approach is that it allows for the incorporation of a number of different variables to explain survivor

gender piece rates and wages evidence from matched employer employee data why are women disproportionately on piece rates we investigate three possible explanations 1 women are more likely to be on piece rates because they have a shorter expected tenure than men 2 a greater demand for flexibility between work and home attracts women to work place technologies suitable for variable pay based on individual performance 3 women prefer piece rates because they are subject to less wage discrimination when objective performance measures are available the weight of our empirical evidence supports the third hypothesis the unexplained gender wage gap is substantially smaller in the piece rate regime than in the time wage regime copyright 2004 oxford university press

going onto invalidity benefit a study for women 1977 78 1983 84 the main form of state insurance for long term sickness in britain is invalidity benefit there has been a dramatic growth in the stock of claimants on this benefit since its introduction in 1971 a logit model is fitted to explain at the individual level the probability of entering invalidity benefit among over 50 000 women in 1977 8 and over 65 000 in 1983 4 demographic characteristics played a powerful role in this model pay and benefit rates were also significant married women s entry probabilities were highly sensitive to local labour market conditions and much more so than other population groups

resolving the impasse on hospital scale economics a new approach the existence of scale economies in hospitals in important for both public and managerial policy yet production and cost function studies have found conflicting evidence more recently more sophisticated studies have typically found scale diseconomies which is inconsistent with the views of industry participants and observers in the early 1980s california deregulated both private and public health insurance medical which provides a natural laboratory for examining hospital efficiency using stigler s original and multivariate survivor analysis we resolve the conflict in favour of scale economies and reconcile the controversy the survivorship methodology in simple to apply and a useful tool in conjunction with statistical cost and production studies

optimal contracting with subjective evaluation this paper extends the standard principal agent model to allow for subjective evaluation the optimal contract results in more compressed pay relative to the case with verifiable performance measures moreover discrimination against an individual implies lower pay and performance suggesting that the extent of discrimination as measured after controlling for performance may underestimate the level of true discrimination finally the optimal contract entails the use of bonus pay rather than the threat of dismissal hence neither efficiency wages nor the right to dismiss an employee are necessary ingredients for an optimal incentive contract

the economic implications of disability insurance in canada the article empirically estimates the effects of disability pensions provided under the canada quebec pension plans on the labor force participation rates of males aged 45 64 years two data sets are used one consists of pooled cross section annual time series data by province for the years 1975 83 the other consists of observations as of 1985 on 651 males in the specified age group naive estimation results from both sets of data suggest a large negative effect of pension income in the case of the micro data this effect becomes small and statistically nonsignificant when more sophisticated estimation methods are used

black white earnings ratios since the civil rights act of 1964 the importance of labor market dropouts published median earnings of wage and salary workers by race and sex are based on distributions that exclude those without earnings and those not employed as wage and salary workers at the time of the survey it has been argued that the changing importance of these exclusions rather than any improvement in the distribution of offered wages for blacks accounts for the apparent increase in black white relative median earnings this paper presents a new method for correcting the published medians for such censoring the apparent improvement in relative earnings is reduced but not eliminated by the correction

drivers of disruption estimating the uber effect abstract a frequent belief is that the rise of so called gig work has led to the displacement of workers in a wide range of traditional jobs this paper examines the impacts of the flagship of the gig economy uber on workers employed in conventional taxi services our analysis exploits newly collected data on the staggered rollout of uber across metropolitan areas in the united states and a difference in differences design to document that incumbent taxi drivers experienced a relative earnings decline of about 10 percent subsequent to uber s entry into a new market while there are no significant effects on their labor supply additional evidence from a battery of placebo tests event study estimates and specifications using google trends data to capture differences in treatment intensity underlines these findings a triple differences design that compares changes among taxi drivers relative to bus tractor and truck drivers that were unaffected by the arrival of uber provides further supporting evidence that the diffusion of uber has reduced the earnings potential of incumbent drivers in conventional taxi services in the united states

customer discrimination and affirmative action i introduction beginning with the work of becker 1957 economists have been concerned with the relationship between competitive market forces and the persistence of labor market discrimination 1 a major insight of becker and the literature that followed is that competition could tend to eliminate discriminatory pay differentials if competitive forces do eliminate discrimination then empirical findings of persistent discrimination are either a result of faulty testing or market imperfections economic analysis of the link between competition and discrimination depends on the origins of prejudice becker identified at least three possible sources employers co workers and consumers 2 in each of these instances the group against which prejudice is directed e g women or minorities which will be termed minorities in this paper may be able to escape discrimination first minorities can work for nondiscriminatory employers if there are any moreover stiglitz 1973 shows that with constant returns to scale such employers will take over markets from the discriminators eliminating any pay gap based on prejudice 3 second if there is co worker prejudice then minorities can work in segregated firms which under constant returns to scale may have a cost advantage over integrated or all majority firms again discrimination will be driven away 4 third minorities can theoretically escape customer discrimination by specializing in the production of goods for which there is no contact between producers and consumers a case discussed by cain 1986 while competitive forces may in some cases erode discriminatory wage differentials the rate of decline of race and sex wage differentials has evidently not been rapid enough in the eyes of policymakers u s anti discrimination policy has been guided by two major vehicles title vii of the 1964 civil rights act and the office of federal contract compliance programs ofccp 5 the equal employment opportunity commission eeoc was created to enforce title vii and is empowered to aid plaintiffs or bring suit itself against employers the commission monitors the employment practices of federal contractors not only are contractors barred from discrimination against protected groups these firms are also required to take affirmative action not to discriminate the purpose of this paper is twofold first it demonstrates that in a general equilibrium framework the case of customer discrimination is theoretically distinct from employer or co worker prejudice in particular while constant returns to scale and the existence of nondiscriminatory firms can eliminate the latter two forms of discrimination customer discrimination may persist even under such conditions the persistence of discriminatory wage differentials is shown to depend on consumer demand technology and the relative size of the minority labor force 6 second the general equilibrium framework is then used to evaluate the impact of government anti discrimination policy where customers are the source of discrimination it is shown that if the government requires equal pay and proportional representation for minorities then the resulting allocation of resources will under particular assumptions be the same as if customers did not discriminate i then contrast these theoretical results with the predicted general equilibrium impact of affirmative action when there is employer or co worker prejudice among previous general equilibrium models of affirmative action welch 1976 assumed no discrimination while freeman 1978 did not specify the source of discrimination it is shown here that the source of prejudice markedly affects one s conclusions about affirmative action further even in some cases where segregation has eliminated discriminatory wage differentials the introduction of affirmative action has allocative effects finally evidence from studies evaluating the impact of affirmative action is used to distinguish among the various equilibrium models

returns to scale and market concentration among the largest survivors of deregulation in the us trucking industry application of the survivor technique to the 100 largest less than truckload carriers of general commodity freight in the us interstate trucking industry produces estimates of the ranges of increasing constant and decreasing returns to scale from 1981 to 1993 the first thirteen years of deregulation nearly one quarter of total group ton miles hauled is found to have moved into the more efficient size range of constant returns to scale a gain in long run technical efficiency is thereby attributed to the motor carrier act of 1980 moreover the survivorship data allow estimates of intragroup market concentration for each of the same thirteen post deregulation years concentration purely within this group appears to have remained fairly moderate and stable since 1981 an unsurprising finding given the modest minimum efficient size estimated at about 2 million ton miles hauled annually the moderate and stable concentration among the 100 largest is not necessarily incompatible with other research which

performance pay and wage inequality an increasing fraction of jobs in the u s labor market explicitly pay workers for their performance using bonus pay commissions or piece rate contracts using data from the panel study of income dynamics we show that compensation in performance pay jobs is more closely tied to both observed and unobserved productive characteristics of workers than compensation in non performance pay jobs we also find that the return to these productive characteristics increased faster over time in performance pay than in non performance pay jobs we show that this finding is consistent with the view that underlying changes in returns to skill due for instance to technological change induce more firms to offer performance pay contracts and result in more wage inequality among workers who are paid for performance thus performance pay provides a channel through which underlying changes in returns to skill get translated into higher wage inequality we conclude that this channel accounts for 21 of the growth in the variance of male wages between the late 1970s and the early 1990s and for most of the increase in wage inequality above the eightieth percentile over the same period

racial differences in access to high paying jobs and the wage gap between black and white women the authors examine the role that racial differences in access to high paying occupations played in determining the racial wage gap in the 1980s analyzing data on black and white women aged 34 44 from the national longitudinal surveys for 1968 88 they estimate the effects of human capital characteristics and discrimination on segregation into high and low wage jobs by race they find that differences in workers measured characteristics explain little of either the observed occupational segregation by race or the racial wage gap in 1988 further analysis suggests that several changes in the wage structure for women during the 1980s notably a widening of occupational wage differentials and an increase in the returns to education abetted direct discrimination in enlarging the racial wage gap among women

wage differentials of transportation industries deregulation versus regulation this article investigates the wage differentials of similar occupations in three for hire transportation carrier industries railroad truck and motor bus under regulation and deregulation the estimation results indicate that the union wage gaps among all occupations have widened under deregulation specifically the union wages of railroad occupations have increased relative to those of truck drivers and the union wages of truck drivers have increased relative to those of motor bus drivers further wage gaps for all occupations for this period are greater among nonunion than among union workers jel l92 i introduction economic regulation of u s transportation carrier industries has been classified into three distinct eras the monopoly regulatory era the competition regulatory era and the regulatory reform era beginning in the late 1800s the 1930s and the 1970s talley 1983 these eras addressed carrier abuses destructive intramodal and intermodal competition and the negative impacts of regulation respectively the 1887 interstate commerce act sought to prevent monopolistic abuses and limit discriminatory practices of railroads the motor carrier act of 1935 of the competition regulatory era placed motor carriers freight and passenger under federal regulation by the 1970s advocates for federal regulatory reform argued that economic regulation protected inefficient carriers promoted high rates and fares and in general fostered an inefficient allocation of resources subsequently a number of deregulation or regulatory reform acts were passed including the railroad revitalization and regulatory reform act of 1976 the staggers rail act of 1980 the motor carrier act of 1980 and the bus regulatory reform act of 1982 though shippers and passengers have generally benefited from transportation deregulation paying lower real rates and fares the impact on carrier labor earnings has been negative for example the real weekly wages of union railroad engineers have declined 11 7 talley and schwarz miller 1998 the real hourly wages of union and nonunion for hire truck carrier drivers have declined 23 and 10 hirsch and macpherson 1998 and the real hourly wages of both union and nonunion for hire motor bus carrier drivers have declined 17 schwarz miller and talley 1994 the impact of deregulation however on the relative labor earnings of transportation carrier industries is unknown specifically have wage differentials changed from those of the regulation period if so have these differentials widened narrowed under deregulation thereby increasing decreasing the gap in the labor earnings of one industry relative to those of another do the changes in wage differentials differ for union and nonunion labor the purpose of this article is to investigate occupational wage differentials among transportation industries under regulation and deregulation as intermodal competition intensifies such information is expected to play a more important role in industry wage negotiations wage differentials of similar occupations in three for hire carrier industries under regulation and deregulation are estimated the three industries are the railroad truck and motor bus industries and the occupations include railroad engineers conductors and brakemen switchmen truck drivers and motor bus drivers the estimation results indicate that the union wages of railroad occupations have increased relative to those of truck drivers and the union wages of truck drivers have increased relative to those of motor bus drivers during the postderegulation period further wage gaps for all occupations for this period are greater among nonunion than among union workers the remainder of this article is structured as follows section ii discusses railroad truck and motor bus for hire carrier industries and in particular their labor under regulation and deregulation

trucking deregulation and labor earnings is the union premium a compensating differential this article examines wage determination among union and nonunion truck drivers using the 96 monthly current population surveys for 1983 90 union density in the previously regulated for hire sector of the trucking industry fell from about 60 during the regulatory period of the 1970s to about 25 by 1990 union log wage premiums fell from 0 40 in the 1970s to 0 30 or below in the 1980s longitudinal estimates from multiple panels for 1983 84 through 1989 90 suggest far smaller union premiums supporting the thesis that part of the wage differential following deregulation is a compensating premium for driver quality

racial differences in residential and job mobility evidence concerning the spatial mismatch hypothesis abstract the spatial mismatch hypothesis asserts that job decentralization adversely impacts the labor market outcomes of african americans this paper tests whether race and job access have an independent effect on the probability of a joint residential move and job change no evidence is found to indicate that race directly influences the joint probability the paper finds however that poor job access has an independent negative effect on the probability of a joint residential move and job change because african american residences are heavily concentrated in american central cities these results suggest that african american workers may not be able to fully adjust as new jobs are created in the suburbs

the incidence of regulatory rents in the motor carrier industry this article focuses on two questions in the debate over motor carrier regulation first did regulation create eliminate or have no effect on monopoly rents in the trucking industry second ifthere were rents what was their incidence were they received by owners oftrucking firms dissipated through higher costs or captured by the teamsters union data on share price responses to deregulation announcements reveal declines in expected profits of 8 19 of totalfirm value this suggests that regulation created monopoly profits and indicates that at least some of these rents accrued to owners of trucking firms firms responses to regulatory change are modelled as functions of company s operating characteristics and measures of unionization operating efficiency and service characteristics are shown to affect the impact of deregulation on share values

pay for performance and compensation inequality evidence from the ecec this article examines the relationship between performance based pay and widening wage inequality using data from the employer costs for employee compensation ecec the results suggest that jobs

team incentives and performance evidence from a retail chain in a field experiment with a retail chain 1 300 employees 193 shops randomly selected sales teams received a bonus the bonus increases both sales and number of customers dealt with by 3 percent each dollar spent on the bonus generates 3 80 in sales and 2 10 in profit wages increase by 2 2 percent while inequality rises only moderately the analysis suggests effort complementarities to be important and the effectiveness of peer pressure in overcoming free riding to be limited after rolling out the bonus treatment and control shops performance converge suggesting long term stability of the treatment effect

imperfect tagging in social insurance programs abstract this paper derives the optimal benefit structure of an earnings insurance program when a characteristic or tag imperfectly identifies those unable to work with a two sided classification error the optimal program is a dual work incentive system with a work non work consumption differential maintained for the tagged and untagged just sufficient to induce the able in each group to work and with more generous payments to tagged than to untagged individuals of the same work status it includes premiums to program eligible individuals who work a price missing in the u s social security disability system and in earlier attempts to characterize the optimal disability program

systems competition and network effects this paper discusses firm behavior market performance and the public and private institutions that arise in systems markets i e markets where consumers use compatible components together to generate benefits in such markets which include communications networks and hardware software networks popular products are inherently more valuable these network effects can drive corporate strategies and are critical in understanding innovation in many high technology markets the discussion here emphasizes the dynamics of consumer adoption decisions in the presence of network effects competition between incompatible systems and how suppliers choose which components are compatible and which are not

compensation unionization and deregulation in the motor carrier industry abstract previous research on the deregulation of the motor carrier industry has concluded that firms have become more efficient under deregulation and that costs have fallen largely at the expense of labor most studies that examine the effects on labor use current population survey data and find that wage premiums to union labor have fallen as a result of deregulation this study uses firm data and finds that deregulation had a very small effect on the average compensation paid by surviving union firms for nonunion firms the impact of deregulation is much larger these results suggest that the compensation premium for the labor of surviving union firms has increased but this increase applies only to surviving union labor in the paper we also point to and note a major exodus of union firms with the result that union labor levels have fallen and fallen dramatically