is there private information in the fx market the tokyo experiment it is a common view that private information in the foreign exchange market does not exist we provide evidence against this view the evidence comes from the introduction of trading in tokyo over the lunch hour lunch re turn variance doubles with the introduction of trading which cannot be due to public information since the flow of public information did not change with the trading rules having eliminated public information as the cause we exploit the volatility pattern over the whole day to discriminate between the two alternatives private information and pricing errors three key re sults support the predictions of private information models first the vola tility u shape flattens greater revelation over lunch leaves a smaller share for the morning and afternoon second the u shape tilts upward an impli cation of information whose private value is transitory finally the morning exhibits a clear u shape when tokyo closes over lunch and it disappears when trading is introduced

is there a glass ceiling in sweden using 1998 data we show that the gender log wage gap in sweden increases throughout the wage distribution and accelerates in the upper tail we interpret this as a strong glass ceiling effect we use quantile regression decompositions to examine whether this pattern can be ascribed primarily to gender differences in labor market characteristics or in the rewards to those characteristics even after extensive controls for gender differences in age education both level and field sector industry and occupation we find that the glass ceiling effect we see in the raw data persists to a considerable extent

day of the week effects and asset returns the number of empirical studies using daily stock returns is rapidly increasing researchers generally assume that the distribution of stock returns is identical for all days of the week a convenient statistical assumption but not a necessary condition of market equilibrium nevertheless there are reasons to suspect that the distribution of returns may vary according to the day of the week the most obvious is the impact of weekends on monday s return since monday s return is calculated over three instead of one calender day the mean and variance may well be higher on monday compared with any other daily return perhaps three times as large previous research has examined the daily distribution of stock returns for a monday effect while fama 1965 does not compare daily mean returns he does report that monday s variance is about 20o greater than other daily returns with a traditional distributional assumption regarding the returns on a financial asset specifies that the expected returns are identical for all days of the week contrary to this plausible assumption this paper discovers that the expected returns on common stocks and treasury bills are not constant across days of the week the most notable evidence is for monday s returns where the mean is unusually low or even negative several explanations of the results are investigated but none proves satisfactory aside from documenting significant day of the week effects the implications of the results for tests of market efficiency are examined while market adjusted returns continue to exhibit day of the week effects these effects are no longer concentrated on monday during the last year we have had many conversations with our colleagues throughout the professions we are particularly thankful to the participants at sessions of the western and american finance associations where preliminary versions of this paper were presented special thanks are due to gene fama gailen hite jon ingersoll robert jarrow merton miller clifford smith and rex thompson the expert research assistance of frank rabinovitch and youngsup yun is gratefully acknowledged 1 the list of papers using daily stock returns is too long to name recent examples include charest 1978 dodd 1980 banz 1981 and reinganum 1981

private food standards regulatory gaps and plantation agriculture social and environmental ir responsibility in the philippine export banana industry the expansion of retailer led food production standards over recent years has seen certification against such standards become a de facto condition of access to numerous supply chains globalg a p standards in particular have extended the traditional focus of retailer led standards beyond food safety to include compliance points addressing environmental protection and labour welfare this has stimulated considerable research on the implications of standards compliance for small producers however little attention has been paid either to the relationships between so called private standards and state based regulatory regimes or to the implications of standards compliance for corporate farms their employees and neighbouring communities this paper examines these relationships and implications in the context of plantation banana production in the philippines focussing in particular on gaps that emerge between the ideals of social and environmental responsibility embodied in private standards and actual practices of regulation it finds that while compliance with private standards is associated with comparatively favourable treatment of labour deference to poorly enforced national legislation conceals ongoing human rights and environmental concerns

gender wage differentials and discrimination in the new south africa research into discrimination within south africa sa has focused on racial issues with gender issues being largely ignored this study aims to estimate gender wage differentials and through decomposition analysis understand the different problems faced by white black coloured and indian asian in 1995 it is found that white and asian females suffer greater gender discrimination than their black and coloured counterparts which could be a signal to future problems black and coloured females may encounter the largest gender wage differential is faced by white females whilst the lowest is encountered by coloured and black females a possible explanation for this finding is the low subsistence wages that the black and coloured population groups command relative to other population groups

trends in female labor force participation in sweden labor force participation of married women increased from 49 1 to 83 5 during the past 2 decades by cross section estimates on micro data of the probability of labor force participation in 1967 1973 and 1980 and by using these estimates for predicting changes in labor force participation we have found that increases in own wage has been by far the most important explanatory factor women s real wages have increased relative to husband s after tax earnings both as an effect of the introduction of compulsory separate taxation in 1971 and as an effect of dramatically decreased sex differentials in pay partly associated with increased female education

a theory of the dynamics of security returns around market closures numerous empirical studies document patterns in the means and variances of security returns measured over periods that are punctuated by market closures this article develops a multiperiod model in which closures delay the resolution of uncertainty thereby redistributing risk across time and agents since agents are risk averse in the model this redistribution affects the equilibrium price altering risk premia liquidity costs and the degree of informational asymmetry as a consequence closures alter both the means and variances of returns the article demonstrates that closures can generate a variety of mean and variance effects including those that mirror the empirical phenomena numerous empirical studies of security returns have documented patterns in both the mean and the variance of returns interestingly most of these patterns are punctuated by periods in which the market is regularly closed for example the variance of returns from the market close to the market opening is much less than the variance from open to close similarly mean returns over weekends are abnormally low in fact significantly negative relative to daily mean returns during the trading week within a trading day return variances are u shaped with peaks occurring immediately after the market opens and just before it closes 2 further french and roll 1986 examine the variance of tuesday close to thursday close returns during a period in which the market was closed on wednesdays and show that this variance is only slightly greater than half the tuesday close to thursday close variance when the market was open on wednesdays 3 one explanation for the differences in the overnight and trading day variances is that market hours mostly coincide with business hours when

do women prefer women s work a new methodology is implemented to determine whether job characteristics can explain why women are concentrated in low paying female dominated occupations extensive information on jobs and labour market histories are collected from the 1982 national longitudinal survey youth cohort for women and men characterized by substantial labour market attachment significant differences in nonpecuniary job characteristics between the male and female samples are found to exist nevertheless we find no evidence that women differentially favour those job characteristics commonly associated with women s work

a decomposition method on employment and wage discrimination and its application in urban china 2002 2013 abstract labor market discrimination is an important issue in developing countries where path dependent institutions have been dominant while effective institutional arrangements and policies have been hidden by local customs and culture however the existing applications of classical blinder oaxaca decomposition face criticism for their imprecise understanding of the factors affecting institutional discrimination in labor markets as well as for their lack of power in formulating well targeted anti discrimination policies following oaxaca 1973 we propose a new method to decompose the total discrimination index tdi to analyze employment and wage discrimination in the labor markets of developing countries the tdi is decomposed into the employment discrimination index edi and the wage discrimination index wdi then into the underpayment index to majorities upi and the overpayment index to minorities opi we apply this method to the institutional discrimination against rural migrants in china s urban areas using national representative data from 2002 to 2013 we have found that 1 the tdi increased quickly after china entered the wto then dropped after anti discrimination policies were implemented 2 the tdi is mainly determined by the upi while the tdi s fluctuation is mainly determined by the wdi our method provides insights into the changing composition of employment and wage discrimination and their respective labor market outcomes in developing countries as a result appropriate policy measures may be developed accordingly

labour market discrimination are there significant differences between the various decomposition procedures economists have usually called the proportion of the average wage gap between two groups which could not be explained by individual characteristics discrimination recently several theories have suggested that labour market discrimination on the one hand lowers the wages of the minority group and on the other leads to higher pay for the majority group in a recent survey of the various methods used to decompose the overall wage differential between two groups oaxaca and ransom compared five approaches in the contexts of race and gender discrimination this paper checks whether there are significant differences between the various decomposition procedures which have appeared in the literature the tests are based on bootstrap techniques

an intraday examination of the federal funds market implications for the theories of the reverse j pattern the intraday literature suggests that returns variances and volume form an intraday reverse j pattern two competing theories explain the observed patterns private information about future security prices and trading stoppages the federal funds market allows a unique opportunity to study the causes of intraday patterns because private information common to most markets does not play a role in setting prices we find reverse j variance patterns while accounting for generalized autoregressive conditional heteroskedasticity garch model effects our results support trading stops as an explanation for the reverse j pattern and suggest that private information is not a necessary condition for the observed pattern

a meta analysis of the international gender wage gap abstract since the early 1970s a number of authors have calculated gender wage differentials between women and men of equal productivity this meta study provides a new quantitative review of this vast amount of empirical literature on gender wage differentials as it concerns not only differences in methodology data and time periods but also different countries we place particular emphasis on a proper consideration of the quality of the underlying study which is done by a weighting with quality indicators the results show that data restrictions i e the limitation of the analysis to new entrants never marrieds or one narrow occupation only have the biggest impact on the resulting gender wage gap moreover we are able to show what effect a misspecification of the underlying wage equation like the frequent use of potential experience has on the calculated gender wage gap over time raw wage differentials worldwide have fallen substantially however most of this decrease is due to better labor market endowments of females

native immigrant wage differentials and occupational segregation in the greek labour market this article explores native immigrant wage differentials in the greek labour market data from the most recent greek household budget survey 2004 05 were employed four alternative occupational categories were considered and occupational choice was explicitly modelled controlling for occupational selectivity occupation specific wage regressions for representative samples of employed native and immigrant workers were estimated and an augmented decomposition technique was utilized to analyse inter and intra occupation wage differentials the obtained results demonstrate that roughly 48 of the average wage differential cannot be explained by differences in observed characteristics and that the larger component of this unexplained part is due to asymmetrical occupational access by native and immigrant workers

volume volatility and new york stock exchange trading halts trading halts increase rather than reduce both volume and volatility volume volatility in the first full trading day after a trading halt is 230 percent 50 to 115 percent higher than following pseudohalts nonhalt control periods matched on time of day duration and absolute net of market returns these results are robust over different halt types and news categories higher posthalt volume is observed into the third day while higher posthalt volatility decays within hours the extent of media coverage is a partial determinant of volume and volatility following both halts and pseudohalts but a separate halt effect remains after controlling for the media effect in the wake of the 1987 market break a number of commentators including the presidential task force on market mechanisms recommended the establishment of circuit breaker mechanisms the primary argument supporting circuit breakers both price limits and trading halts is that nontrading periods provide an opportunity for normal information transmission in times of market duress proponents of circuit breakers claim that during major price changes there can be a breakdown in the transmission of information between the trading floor and market participants therefore the primary function of a circuit breaker should be to reinform participants greenwald and stein 1988 p 17 by lowering informational asymmetries between traders halts could permit the orderly emergence of a new consensus price but would informative trading halts succeed many academics are openly suspicious of any kind of market interference and assume that trading halts are guilty until proven innocent grossman 1990 p 3 for example argues that the closing of markets merely prevents consenting adults from carrying out their desires on the floor of the stock exchange not only do halts impose a liquidity cost on traders but studies suggest that information will not be as

wage discrimination occupational segregation and visible minorities in canada the earnings gap between each of whites asians and blacks is decomposed into the effects on earnings of productivity related characteristics wage discrimination and occupational segregation unlike previous canadian studies this paper analyses the relative economic position of both immigrant and native born visible minorities and explicitly incorporates the effect of discrimination in occupational attainment on the earnings gap the results indicate that policies aimed at increasing the ethnic representation across occupational categories would be effective only for black men anti discrimination legislation aimed at decreasing the earnings gap between visible minority and white women should have a dual focus they should aim at reducing the inter occupational wage discrimination they should provide training programs to extend the career ladders confronting ethnic minority women

do private standards create exclusive supply chains new evidence from the peruvian asparagus export sector abstract developing countries are increasingly exporting fresh horticultural products to high income countries these exports increasingly have to comply with stringent public and private standards as well as other quality and safety issues there is an ongoing debate on the effect of private standards on the inclusion of small scale farmers in export supply chains with this paper we contribute to this debate by providing new evidence from the peruvian asparagus export sector and by addressing several important methodological shortcomings and gaps in the existing literature we describe export dynamics using a unique firm level dataset on 567 asparagus export firms from 1993 to 2011 and the evolution of certification to private standards using own survey data from a stratified random sample of 87 export firms we use an unbalanced panel of the surveyed companies on 19 years and several methods including fixed effects and gmm estimators to estimate the causal impact of certification to private standards on companies sourcing strategy we find that certification leads to vertical integration and significantly reduces the share of produce that is sourced from external producers with a larger effect for small scale producers when distinguishing between production and processing standards and between low level and high level standards we find that especially high level production standards have a negative impact on sourcing from small scale producers

can job evaluation improve women s wages systematic job evaluation or comparable worth programmes are often seen as a method to increase the relative wages of women this paper examines whether this is the case using two job evaluation studies from the university sector in sweden two different evaluation schemes were used in these studies the general result found in this analysis is that complete implementation of the evaluation results would lead to an increase in women s relative wages by between 2 and 6 this finding is however not uniform in the sense that all women would gain and all men would lose results indicate that about two thirds of women are winners and one third losers while the figures for men are approximately the reverse assuming that the job evaluations give a correct measure of productivity the results are also used in an analysis of wage discrimination and the crowding effect the findings indicate a significant crowding effect but are less conclusive with regard to discrimination

do codes of conduct improve worker rights in supply chains a study of fair wear foundation the rise of private regulation of sustainability in global production networks has led to intensive debates about the impact of this regulation at the point of production yet few empirical studies have systematically examined this impact in practice based on multiple factory audits of 43 garment factories conducted by the multi stakeholder initiative fair wear foundation we show that codes of conduct improve although marginally worker rights on an overall level but that few significant results are found for specific worker rights our findings also lend support to the widespread argument that codes have uneven impact furthermore we show that even rigorous multi stakeholder factory audits seldom are able to identify process rights violations such as those affecting freedom of association and discrimination and that auditing is thus is more fundamentally flawed than assumed in previous research given companies extensive investments in private regulation of worker rights the findings have important implications for both scholars and managers

trading volume and serial correlation in stock returns this paper investigates the relationship between aggregate stock market trading volume and the serial correlation of daily stock returns for both stock indexes and individual large stocks the first order daily return autocorrelation tends to decline with volume the paper explains this phenomenon using a model in which risk averse market makers accommodate buying or selling pressure from liquidity or noninformational traders changing expected stock returns reward market makers for playing this role the model implies that a stock price decline on a high volume day is more likely than a stock price decline on a low volume day to be associated with an increase in the expected stock return

immigrants minorities and labor market competition this paper investigates the extent of labor market competition among immigrants minorities and the native population an analysis of 1980 u s census data reveals that immigrants tend to be substitutes for some labor market groups and complements for others the effects of shifts in immigrant supply on the earnings of native born men are however very small on the other hand increases in the supply of immigrants do have a sizable impact on the earnings of immigrants themselves an increase of 10 percent in the supply of immigrants for example reduces the immigrant wage by about 10 percent

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

human capital discrimination and the gender wage gap in bangladesh summary this paper investigates changes in the gender wage gap in bangladesh over the period 1999 2009 the gap in average wages between men and women decreased by 31 over this period this paper shows that a key driver of this change was an improvement in female educational qualifications it also demonstrates that the gender wage gap across the wage distribution narrowed much more at the lower end of the wage distribution than at the upper end it attributes this mainly to a decline in discrimination against women implications for policies aimed at more equal access to education and enforcement of equal pay legislation in bangladesh are also identified

the gap between male and female pay in the spanish tourism industry abstract this paper analyzes wage differentials between male and female workers in the spanish tourism industry using a large administratively matched employer employee data set obtained from a representative sample of companies this allows us to control for unobserved firm specific factors likely to affect the magnitude of the gender wage gap our findings indicate that male workers earn on average 6 7 higher monthly wages than their socially comparable female counterparts in particular the type of contract held the qualifications required for the job and the specific sub sector of employment are very important variables in explaining this gender wage difference we also find that only around 12 of the mean wage difference in the tourism industry cannot be explained by differences in observable characteristics which is well below the average for the rest of the industries in spain 87 our interpretation is that minimum wage legislation provides a particularly effective protection to women in the tourism industry which is characterized by a large number of low wage earners

do private standards benefit workers in horticultural export chains in peru private standards are spreading rapidly in international food production and trade and are moving beyond food quality and safety aspect to address environmental and social concerns we examine how effective private standards are in improving employment conditions in global food supply chains using panel data from own company and worker surveys and different econometric techniques we analyze how the adoption of a variety of private standards that differ with respect to their focus on labor influences employment conditions in production processing and exporting companies in the horticultural export chain in peru we find that workers employed in companies adopting private labor standards are more likely to be paid a minimum wage to have a contract and to receive training but there is no effect of private standards on the level of the wage and on the employment period we conclude that labor standards are most effective in reinforcing the respect of national labor laws and when there exists a clear cut definition on the employment requirements they push forward despite the existence of labor regulations at the national level and the wide spread use of private labor standards ethical labor concerns do remain an issue in the peruvian horticultural export sector

a further investigation of the weekend effect in stock returns this study uses a longer time period and additional stocks to further investigate the weekend effect we find consistently negative monday returns 1 for the s p composite as early as 1928 2 for exchange traded stocks of firms of all sizes and 3 for actively traded over the counter otc stocks the otc results are based on bid prices and therefore appear to reject specialist related explanations for the 30 individual stocks of the dow jones industrial index the average correlation between friday and monday returns is positive and the highest of all pairs of successive days the latter finding is inconsistent with fairly general measurement error explanations some of the most puzzling empirical findings reported in recent years indicate that the distribution of common stock returns varies by day of the week most notably the average return for monday close friday to close monday is significantly negative cross 3 and french 6 find negative monday returns using the standard and poor s composite index and gibbons and hess 7 find negative monday returns for the 30 individual stocks of the dow jones industrial index 1 this negative monday return or weekend effect has yet to be explained this study undertakes a further investigation of the weekend effect in stock returns we examine additional time periods extending the total period covered to 55 years we examine additional stocks such as those of small low capitalization firms and those traded over the counter in all cases the data exhibit a weekend effect that is at least as strong as that reported in previous studies the study also readdresses potential explanations for the effect such as measurement error but concludes that none of these explanations is satisfactory the first section presents a history of the weekend effect from 1928 through 1982 based on the standard and poor s composite index we essentially double the length of the period beginning in 1953 examined by french 6 the results indicate consistently negative monday returns throughout the 55 year period during much of the 25 year period from 1928 through 1952 the new york stock exchange was open on saturdays so monday s return is then computed from saturday s close to monday s close 2 these returns for one day weekends are consistently negative and not significantly different from the two day weekend

the impact of the tomato agroindustry on the rural poor in mexico this article addresses the issue of whether the tomato agroindustry tai has been an effective instrument in the reduction of rural poverty the tai is by far the most important agroindustry in mexico in terms of exports and employment creation most of the laborers employed by the tai in northwest mexico are temporary migrants coming from poverty stricken regions in southern mexico conditions of poverty induced migration are explained the characteristics and strategies of large modern tomato enterprises are analyzed the main conclusion is that migrant income earned in the tomato fields and packing plants is fundamental for the bare survival in villages in poverty stricken regions however this does not provide a solution to poverty alleviation because migrant income is not sufficient to contribute to capital formation in the migrating communities or the to create the conditions for endogenous local development

day of the week and intraday effects in stock returns abstract this study examines day of the week effects using hourly values of the dow jones industrial average we find that over the 1963 1983 period the weekend effect has sifted from characterizing active trading on monday to characterizing the non trading weekend over the early part of our sample period negative returns characterize each hour of trading on monday while the return from friday close to monday open is positive in the most recent subperiod monday average hourly returns after noon are all positive and the weekend effect is due to negative average returns from friday close to monday open

how do consumers in developed countries value the environment and workers social rights in developing countries this paper uses a lab experiment to investigate developed countries consumer valuations of characteristics linked to the environment and workers social rights in developing countries it focuses on seafood products and distinguishes between regular environmentally friendly and fair trade varieties consumer valuations are elicited with a multiple price list results show that environmental and social labels have similar effects on participant willingness to pay when they are first presented using welfare variation coming from the labels we also show that the absence of negative information linked to the regular variety may lead to an underestimation of the value of information associated with the label

the employer size wage gap evidence for britain university of edinburgh and university of sussexfinal version received 5 may 1992 this paper presents estimates for the employer plant size wage gap for britain using anordered probit model selectivity corrected wage equations are estimated for three plant sizecategories in a comparison between plants with more than 500 workers and those with lessthan 100 a wage gap estimate of over 17 per cent is detected the wage effects of unionizationin plants with more than 500 workers is reported as insignificant in contrast to evidenceprovided by idson and feaster 1990 for the united states no evidence of non randomsorting of workers across plant size is detected

methodologies and perspectives in research on labour relations in global agricultural production networks a review the integration of global south actors into the global agricultural economy has attracted research on labour effects this is because global south actors are often integrated at the level of produc

wage determination of registered nurses in proprietary and nonprofit nursing homes this study explores why registered nurses employed in nonprofit nursing homes earn higher wages than those employed in proprietary facilities previous studies have explained this finding in a property rights context where higher wages were posited to result from the weaker incentives for cost minimization accompanying nonprofit status this paper tests an alternative explanation of sectoral wage differences which is predicated on the reason for the coexistence offor profit and nonprofit firms in a given industry informational constraints concerning the quality of care are posited to cause the long term health care market to fail to provide care at the upper levels of a quality of care continuum nonprofits are viewed as a response to this form of market failure acting to fulfill customers demand for higher quality and higher cost long term care with attendant demand for higher quality nurses than in for profit homes both the observed sectoral pattern in selectivity and wage decompositions based on selectivity corrected wage regressions call into question the property right explanation yet are consistent with an asymmetric information explanation

asymmetric labor market reforms effects on wage growth and conversion probability of fixed term contracts the authors investigate the impact of a change in employment protection laws in portugal that increased the maximum legal duration of fixed term contracts they find that this reform led to a reduction in the probability that a worker on a fixed term contract would be converted to a permanent contract in addition those workers who had their contracts converted experienced a significantly higher hourly wage growth at the time of conversion and faced a lower reduction in wage growth during the years in which the changed legislation was in force consequently the implementation of this law led to a 27 increase in the wage growth differential between the two contracts the findings are based on an endogenous regime switching model using rich administrative linked employer employee data

new findings regarding day of the week returns over trading and non trading periods a note this paper decomposes daily close to close returns into trading day and non trading day returns we discover that all of the average negative returns from friday close to monday close documented in the literature for stock market indexes occurs during the non trading period from friday close to monday open in addition average trading day returns open to close are identical for all days of the week january firm size turn of the year anomalies are shown to be interrelated with day of the week returns

measuring the gender wage gap a methodological note we propose to estimate the blinder oaxaca decomposition by a single equation model augmented with interactions between the group membership and other predictors the relative importance of predicto

an investigation of transactions data for nyse stocks using transactions data the behavior of returns and characteristics of trades at the micro level is examined a minute by minute market return series is formed and tested for normality and autocorrelation evidence of differences in return distributions is found among overnight trades trades during the first 30 minutes following the market opening trades at the close and trades during the remainder of the day the latter distribution is found to be normal unusually high returns and standard deviations of returns are found at the beginning and the end of the trading day when the beginningand end of the day effects are omitted autocorrelation in the market return series is reduced substantially a number of patterns in trading are reported this paper empirically investigates the nature of the return generating process and the characteristics of trade size price changes trading frequency and trading interval at the level of individual trades for a large sample of nyse stocks previous studies of market indices have used daily weekly or monthly

global value chains labor organization and private social standards lessons from east african cut flower industries summary this article examines the opportunities and challenges that private social standards pose for labor organizations it explores different labor responses to private social standards in east african cut flower industries the analysis incorporates the concept of labor agency in global value chain analysis and reveals how retailer driven chains offer more room for labor organizations to exercise their agency than the traditional cut flower value chains labor organizations have been able to influence social standard setting and implementation and to use standards to further labor representation at production sites however labor organizations ability to seriously challenge the prevailing governance structure of the cut flower value chain appears extremely limited

private regulation and trade union rights why codes of conduct have limited impact on trade union rights codes of conduct are the main tools to privately regulate worker rights in global value chains scholars have shown that while codes may improve outcome standards such as occupational health and safety they have had limited impact on process rights such as freedom of association and collective bargaining scholars have though only provided vague or general explanations for this empirical finding we address this shortcoming by providing a holistic and detailed explanation and argue that codes in their current form have limited impact on trade union rights due to i buyers paying lip service to trade union rights ii workers being treated as passive objects of regulation in codes of conduct iii auditing being unable to detect and remediate violations of trade union rights iv codes emphasizing parallel means of organizing v suppliers having limited incentives for compliance and vi codes being unable to open up space for union organizing when leveraged in grassroots struggles our arguments suggest that there is no quick fix for codes limited impact on trade union rights and that codes in their current form have limited potential to improve trade union rights we conclude by discussing ways in which codes of conduct and private regulation of worker rights more generally could be transformed to more effectively address trade union rights

gender differences in observed and offered wages in canada 1980 according to the 1981 census of canada the female rate of pay is 30 percent less than the male rate the average female wage offer however is only around one half of that received by males other things being equal slightly more than one half of the difference in observed wages can be explained by diffe rences in wage related characteristics between males and females two fifths of the disparity between wage offers can be explained by the same set of factors analysis of the distribution of wage offers indicates greater wage inequality in the canadian labor market than suggested by study of observed wages

the endogeneity of union status an empirical test an unsettled issue in the literature relating to the relative wage effect of unions is the appropriate treatment of union status in a wage determination model in the context of a three equation model determining union membership and union and nonunion sector wage rates this paper presents an instrumental variables iv procedure for estimating the parameters of the wage equations and a test of the exogeneity of union status using the hausman specification test an advantage of our iv procedure in comparison to the widely used inverse mill s ratio procedure is that our procedure is a distribution free estimator whereas the inverse mill s ratio estimator hinges in the assumption that the error term of the choice equation is normally distributed using data for a sample of middle aged white workers we estimate the parameters of the union and nonunion wage equations with both procedures on the key question of the endogeneity of union status the hausman test decisively rejects the null hypothesis of exo

estimation of limited dependent variable models with dummy endogenous regressors applied economists have long struggled with the question of how to accommodate binary endogenous regressors in models with binary and nonnegative outcomes i argue here that much of the difculty with limited dependent variables comes from a focus on structural parameters such as index coefcients instead of causal effects once the object of estimation is taken to be the causal effect of treatment several simple strategies are available these include conventional two stage least squares multiplicative models for conditional means linear approximation of nonlinear causal models models for distribution effects and quantile regression with an endogenous binary regressor the estimation strategies discussed in the article are illustrated by using multiple births to estimate the effect of childbearing on employment status and hours of work

global value chains large scale farming and poverty long term effects in senegal this paper presents panel data evidence on the impact of expansion of global value chains and large scale export oriented farms in developing countries over almost a decade we estimate the income effects of wage employment on large scale farms in the horticultural export sector in senegal using data from two survey rounds covering a seven years period of rapid expansion of the sector we estimate average income effects as well as heterogeneous income effects using fixed effects and quantile fixed effects regressions we find that poverty and inequality reduced much faster in the research area than elsewhere in senegal employment in the horticultural export sector is associated with higher household income and the income effect is strongest for the poorest households expansion of the horticultural export sector in senegal has been particularly pro poor through creating employment that is accessible and creates substantial income gains for the poorest half of the rural population these pro poor employment effects contrast with insights in the literature on increased inequality from rural wage employment

labor market discrimination against hispanic and black men h ispanic american men have lower average wage rates than white non hispanics in 1975 the average white non hispanic male wage earner in the united states earned 5 97 an hour mexican men earned 4 31 72 as much as white non hispanics puerto rican men earned 4 52 76 as much and cuban men earned 5 33 89 as much as white non hispanics by way of comparison black men s average wages in 1975 were 4 65 78 of the white male wage several possible reasons for the hispanics lower wages come to mind among them are age and education geographic location immigration language difficulties and discrimination for example as shown in table 1 mexicans and puerto ricans are younger on average than the white non hispanic population and earnings tend to rise with age hispanics have lower average levels of education than white non hispanics and wages are positively associated with education many mexican americans live in the southwest where prices are relatively low moreover hispanics are more likely to be recent immigrants and to lack fluency in english than white non hispanics and so to be at a disadvantage in the labor market in addition there is a widespread belief that hispanics suffer from employment discrimination and cannot obtain the wages that their human capital would command if they were non hispanic whites how much of the wage differentials described above are due to each of these factors and to other inter group differences in wage related characteristics in particular how much impact does labor market discrimination have on the average hispanic man s wage and how does this compare with discrimination against blacks this paper provides answers to these questions a few other efforts have been made to analyze the relative earnings of hispanic and white nonhispanic men using 1960 and 1970 census data fogel 1966 poston and alvirez 1973 poston alvirez and tienda 1976 long 1977 and gwartney and long 1978 we use more recent data from the 1976 survey of income and education this data set enables us to measure wage rates more accurately and to specify the wage function more completely than does the census unlike previous analysts in estimating the wage function we take account of possible selectivity bias due to the distinction between average wage offers and average observed wages thus we hope to obtain a more accurate and up to date measure of labor market discrimination against hispanic men section ii explains the method used to separate the minority white non hispanic wage differential into the portions due to differences in average characteristics and the portion due to differences in unobserved factors and discrimination taking into account the possibility of selectivity bias in the observed wage sample section iii describes the data used in the study and the specification of the wage equation the breakdown of the observed wage differentials into components due to differences in participation in the wage and salary sector local price levels average characteristics and discrimination are presented in section iv section v summarizes our findings and discusses their implications for efforts to improve the economic situation of hispanics in the united states

the effect of unions on the employment of blacks hispanics and women to investigate whether unions have helped or hindered the employment prospects of minorities and women the author analyzes data on 1 273 california manufacturing plants for the period 1974 80 the

entrepreneurial women and men two different species the ability of the self employed to create additional job opportunities is a fundamental concern given the huge increases in public resources targeted at new venture creation in the u k and other countries since 1979 this study initially concentrates on identifying differences in the personal and demographic characteristics of women and men in four potential labour market states namely unemployment waged employment single self employment and job creating self employment it then goes on to consider labour market transitions over a four year period between 1991 and 1995 the key findings are firstly that women entrepreneurs are better educated than their male counterparts and secondly that flows into self employment were considerably higher for men than women furthermore proportionately three times as many male self employed in 1991 had gone on to become job creating self employed by 1995

the definition of part time employment a switching regression model with unknown sample selection rejecting the standard less than thirty five hours per week categorization of part time workers this paper offers an empirically justified definition of the part time employed the definition is based on the distinction through wage payments that employers make between a high hours full time and a low hours part time group of workers a switching regression model of wage equations with deterministic but unknown sample selection is estimated resulting in a significant split between high hours and low hours workers that is higher than the standard definition wage differentials are calculated and decomposed and estimates from the structural choice model are presented copyright 1991 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

supermarkets and agricultural labor demand in kenya a gendered perspective abstract many developing countries are experiencing a rapid expansion of supermarkets new supermarket procurement systems could affect farming patterns and wider rural development while previous studies have analyzed farm productivity and income effects possible employment effects have received much less attention special supermarket requirements may entail intensified farm production and post harvest handling thus potentially increasing demand for hired labor this could also have important gender implications because female and male workers are often hired for distinct farm operations building on data from a recent survey of vegetable farmers in kenya a double hurdle model of hired labor use is developed and estimated farmer participation in supermarket channels increases the likelihood of hiring labor by 20 and demand for hired labor by 61 a gender disaggregation shows that positive employment effects are especially pronounced for female laborers who often belong to the most vulnerable population groups rural employment generation can be an important vehicle for poverty reduction

job search and immigrant assimilation an earnings frontier approach this study examines labor market assimilation by measuring the information utilized by immigrants during job search assimilation is assumed to occur whenever such information increases with length of residence in the united states and repeated job searches the authors assert that information utilized during job search reduces differentials between actual and potential maximum attainable earnings coauthors are henry w herzog jr richard a hofler and alan m schlottmann copyright 1992 by mit press

gender discrimination and compensating differentials in sweden the determinants of the unexplained component of the male female wage difference in sweden are examined the hypothesis that there is a compensating wage differential associated with undesirable job charcteristics is tested hedonic wage equations are estimated using data collected in the 1981 swedish level of living survey the estimation takes into consideration possible sample selection bias due to the non randomness takes of employment and the potential endogeneity of job choice variables in wage offer equations overall the analysis indicates that compensating wage differentials are not a major determinant of the male female wage difference in sweden

a gendered value chain approach to codes of conduct in african horticulture codes of conduct covering the employment conditions of southern producers exporting to european markets mushroomed throughout the 1990s especially in the horticulture sector linking uk and european supermarkets with export firms in africa the majority of employment in this sector is informal a significant proportion of which is female this paper explores the gender sensitivity of codes currently applied in the african export horticulture sector from an analytical perspective that combines global value chain and gendered economy approaches through an analysis of these two approaches it develops a gender pyramid which provides a framework for mapping and assessing the gender content of codes of conduct the pyramid is applied to codes that cover employment conditions in three commodity groups and countries exporting to european markets south african fruit kenyan flowers and zambian vegetables and flowers it concludes that the gender sensitivity of codes needs to be greatly enhanced if they are to adequately address employment conditions relevant to informal and especially women workers

trading and returns under periodic market closures this paper studies how market closures affect investors trading policies and the resulting return generating process it shows that closures generate rich patterns of time variation in trading and returns including those consistent with empirical findings 1 u shaped patterns in the mean and volatility of returns over trading periods 2 higher trading activity around the close and open 3 more volatile open to open returns than close to close returns 4 higher returns over trading periods than over nontrading periods 5 more volatile returns over trading periods than over nontrading periods it also shows that closures can make prices more informative about future payoffs we model a competitive stock market with periodic closures in which investors trade for both allocational and informational reasons we use the model to study how market closures intrinsically affect investors trading behavior and the return generating process the purpose of this analysis is to increase our understanding of the time variation in security trading and returns that are associated with regular market closures such as the intraday and intraweek patterns in stock returns volatility and trading volume we consider a stock market in which the exogenous information flow is homogeneous over time and the market closes periodically when the market is open investors trade the stock either to rebalance their overall portfolio of assets which also includes other illiquid assets or to speculate on future stock payoffs using their private information in particular investors adjust their asset portfolio by trading the stock in order to hedge the risk of illiquid assets we refer to these trades as hedging trades and those motivated by private information as speculative trades when the market is closed hong is from the graduate school of business stanford university and wang is from the sloan school of management massachusetts institute of technology and nber the authors thank jennifer huang for programming assistance and an anonymous referee for many valuable suggestions they also thank glenn ellison john heaton craig holden andrew lo steve slezak jeremy stein rene stulz the editor the nber asset pricing lunch group and par

incorporating the causes of occupational differences in studies of racial wage differentials this study provides a basic framework for incorporating the causes of occupational differences into analyses of racial wage differentials separating the influences of personal characteristics occupational choice and hiring discrimination on occupational attainment provides measures of the contributions of each to the racial pay gap the paper also considers the potential for bias in the wage equation estimates arising from self selection into occupations there are two generalfindings first correcting for self selection increases the importance of occupational distribution in explaining racial wage differentials second a proper accounting of the causes of these occupational differences yields discrimination measures that are higher than those that arise when occupational dummy variables are included in the wage equations and all the difference in occupational distribution is treated as nondiscriminatory

a transaction data study of weekly and intradaily patterns in stock returns abstract weekly and intradaily patterns in common stock prices are examined using transaction data for large firms negative monday close to close returns accrue between the friday close and the monday open for smaller firms they accrue primarily during the monday trading day for all firms significant weekday differences in intraday returns accrue during the first 45 minutes after the market opens on monday mornings prices drop while on the other weekday mornings they rise otherwise the pattern of intraday returns is similar on all weekdays most notable is an increase in prices on the last trade of the day

racial wage gaps and differences in human capital this paper uses the cotton neumark decomposition methodology and 1990 cps data to investigate the relative importance of labour market structure and human capital in explaining the white male asian white male black white male hispanic wage gaps we find that labour market structure is more important than human capital in explaining the white minority wage gaps moreover most of the labour market structural effects are due to differential returns to white structural characteristics our result is robust to the specification of human capital our results contradict the results of research that indicate that the white minority wage gaps can be explained solely by differences in the endowment of human capital our results have implications for narrowing the wage gaps between whites and racial minorities

the role of fairtrade certification for wages and job satisfaction of plantation workers summary worker welfare and employment conditions in the agri food producing and processing sectors in the global south have become an increasing concern for consumers sustainability standards such as fairtrade play an important role in agri food markets of horticultural produce and may be a tool to address these concerns however so far the implications of fairtrade certification for extrinsic and intrinsic employment factors of hired labor on large scale plantations remain hardly understood in this paper we assess its effect on workers hourly wages and their level of job satisfaction with primary survey data from 325 randomly sampled workers from eight different export oriented pineapple companies in ghana we apply a linear linear mixed model and instrumental variable approach to take into account the multilevel characteristics of our data and possible selection bias our findings show that both hourly wages and job satisfaction are indeed higher on fairtrade certified plantations factors of increased job satisfaction are likely driven by higher wages permanent employment contracts training opportunities company services such as medical care and paid leave as well as established labor unions on fairtrade certified plantations

gender wage discrimination in the thai labor market in thai this paper investigates the presence of gender wage differentials in the thai labor market a two step approach heckman 1979 was applied in estimating wage equations to avoid sample selection bias the wage differential decomposition methods oaxaca 1973 cotton 1988 oaxaca and ransom 1994 were used the data used were obtained from the labor force survey july september 2008 conducted by the national statistical office of thailand the findings indicate that female workers received lower wages than male workers because of their gender not because they are less productive on the contrary the female workers were shown to be more productive than the men the analysis indicates they would have earned higher wages than men this is especially true in the age groups 15 24 and 25 54 years old although the wage gap was partly explained by a lower productivity of workers 55 60 years old wage discrimination played a substantial role wage discrimination was worse in the younger than the older worker groups

does drug use lower wages this study using microdata from the 1980 and 1984 waves of the national longitudinal survey of youth examines the effects of drug use on wages and employment contrary to most previous researcher