Interindustry part-time and full-time wage differentials: regional and national analysis

This paper provides more evidence that the wage differential is far smaller than is suggested by simple comparison of gross wages of full-time and part-time workers. It is noted that to obtain a more reasonable measure of the full-time and part-time wage differential, it is necessary to adjust for differences in workers' characteristics, labour market conditions and sample selection. It is found that, in general, full-time and part-time workers exhibit different personal characteristics. In particular, full-time workers possess more human capital and experience than part-timers. Also, labour market conditions such as unions and pension plans favour full-timers. These differences may partly account for the wage disparity between full-time and part-time workers. It was noted that the nonrandomness of the workers into full-time and part-time jobs influences the wage determination of both full-time and part-time workers. The results indicate that the adjustment of the wage equations to reflect the above mentioned differences reduces the national wage differential between full-time and part-time workers by 10%. The reduction is even larger across regions and industries. Another finding was that the wage determination processes between full-time and part-time workers do differ.     

Incidence and Duration of Unemployment Spells: Implications on the Wage Differentials of Part-Time and Full-Time Workers

This article analyzes the extent to which incidence of unemployment and duration of unemployment spells affect the wage differentials between full-time and part-time workers. The estimation results of a sample selectivity bias–adjusted wage equation reveal that high incidences of unemployment are associated with low wages for both full-time and part-time workers. However, the reduction in wages due to incidence of unemployment is larger for full-time workers in high-paid jobs than for their part-time counterparts. Duration of unemployment spells affects full-time and part-time workers differently. In general, longer unemployment spells tend to increase the wages of full-time workers but tend to depress the wages of part-time workers. Although the probability of unemployment is not a factor in explaining the wage differential, the duration of unemployment accounts for a substantial portion (about 66.6% in full sample) of the wage differential that exists between full-time and part-time workers.     

The Impact of Income Taxation on the Labor Supply of Part-time and Full-time Workers

This paper estimates the effect of income taxation on the labor supply of part-time and full-time workers in the United States. Using a model that incorporates the endogeneity of the net wage rate and the virtual income, and correcting for self-selection into part-time and full-time jobs, the results indicate that part-time workers are relatively more responsive to changes in income tax than full-time workers. Estimated wage elasticities are relatively larger for part-time than for full-time workers.The simulation results indicate that income tax has a disincentive effect on both part-time and full-time workers, with part-time and full-time workers reducing their labor supply by 0.87 and 0.58 hours, respectively, if a 5% tax is imposed. However, the percentage reduction in hours of work is very small, and a tax policy may have little effect on the labor supply of workers.The results seem to suggest that female and black part-time workers are more likely to drop out of the labor force at higher levels of income tax. It also tests the hypothesis that the labor supply behavior of parttime and full-time workers differs.The test results indicate that the determinants of the labor supply of part-time workers are different from those of full-time workers. It is noted that there is a significant difference between the labor supply of male part-time and female parttime workers, as well as between the black part-time and white part-time workers. In order to reduce voluntary unemployment in market activities among married females and blacks, the government can encourage part-time work by sponsoring legislation or instituting a scheme that will allow part-time workers to pay relatively less in payroll taxes.     

The rise of part-time employment in the great recession: Its causes and macroeconomic effects

During the Great Recession, the U.S. economy witnessed a substantial rise in part-time employment for a sustained period. We extend the New Keynesian unemployment model by Galí et al. (2012) to allow substitutions between full-time and part-time labor, and estimate the model’s parameters by using the Bayesian method. In our model, households and firms can optimally allocate full-time and part-time labor, and disturbances exist in part-time labor supply (household disutility from part-time labor) and part-time labor demand (firms’ efficiency to use part-time labor). As for the Great Recession, the initial increase in part-time employment at the outset of the financial crisis is mostly explained by the rise of the risk premia; the persistently high level of part-time employment in the later period is mainly explained by an exogenous increase in part-time labor supply. A part-time labor supply shock also explains a significant portion of slow recovery in the gross wage during the recession, as the shock lowers the part-time wage and the proportion of full-time workers in total employment. Notably, the results from our model suggest that though the transition from full-time to part-time jobs contributed to mitigating the sharp contraction in total employment and labor force during the Great Recession, it played only a limited role in relieving recessionary pressure.     

Social security and the choice between full-time work,part-time work and retirement

This paper investigates the determinants of retirement decisions in the UK. To deal with the endogeneity bias introduced by the piecemeal linear budget constraint generated by the social security system, it specifies a utility function in income–leisure space and assumes that individuals maximise it over three discrete regimes: full-time work, part-time work, and retirement. Using maximum likelihood techniques, it estimates the utility function and quantifies the influence of pensions, wages and personal characteristics (age, health, status, etc.) on the probability of partial and complete withdrawal from the labour market.     

How is the worker’s weekly hour related to wage over the life cycle? The U.S. evidence

The current study estimates the relationship between weekly hours and weekly wage over the life cycle of a representative sample of workers. Recognizing the endogeneity of these two variables, the study estimates both equations in a simultaneous equations framework and demonstrates that the relationship between weekly hours and weekly wage is not uniform over the worker’s life cycle. These two variables are negatively related when the workers are young and have a positive relationship when they are matured adults. This conclusion remains valid for both men and women. Our robustness check further confirms that workers respond to wage increases differently at different stages of their working career. This has interesting policy implications. Any policy to influence the worker’s hours decision through wage incentive must consider the stage of his/her working career.     

Occupational sex segregation in the UK 1979–89: the role of part-time employment

In this article, the pattern of occupational segregation by sex in the UK between 1979 and 1989 is explored through the decomposition of the new Karmel Maclachlan index. Over the upturn, 1983–89, integration of the sexes, as measured by the Composition Effect occurred faster for full-time employment than total (full-time and part-time) employment. On the other hand, integration, in general, proceeded more slowly over the downturn of 1979–83 but total employment showed a more rapid rate of desegregation than full-time employment. Further analysis of the index, based on notional redistributions of part-time and full-time employment, confirms that part-time employment appears to be disproportionately responsible for the overall level of occupational sex segregation and to inhibit its decline over the upswing. These results are attributed to the different labour supply behaviour of males and females and the propensity of employers to treat part-time employees as a flexible reserve. Policies are outlined to counteract both the unequal treatment of part-time workers, particularly women, and the allocative inefficiency caused by the growth of part-time employment, relative to full-time employment.     

The importance of worker, firm and match effects in the formation of wages

This paper estimates a Mincerian wage equation with worker, firm, and match specific effects and thereby complements the growing empirical literature started by the seminal paper of Abowd (Econometrica 67:251–333, 1999b). The analysis takes advantage of the extensive Danish IDA data which provides wage information on the entire working population in a 27-year period. We find that the major part of wage dispersion in the Danish labor market can be explained by differences in worker characteristics. However, the relative contributions of the three components vary across subgroups of workers. The match effect constitutes a non-negligible part of the overall wage dispersion. An analysis of inter-industry wage differentials shows that firm characteristics are more important at the industry level than at the worker level. Similarly, we find evidence that high-wage workers tend to sort into high-wage industries to a larger extent than they sort into high-wage firms within industries. The mobility pattern of workers is related to the quality of the firm and the match. Finally, we find that firms’ wage policies differ across subgroups.     

Labor market decisions of married women: With emphasis on part-time employment

Part-time employment may be viewed as a bridge between nonemployment and full-time employment or as an alternative to full-time employment. For married women with young children, part-time employment represents an efficient labor market solution to balancing the responsibilities of career and family. This paper estimates the probability of part-time employment for married women by utilizing a multinomial logit model for data extracted from the Panel Study of Income Dynamics [2000]. The paper focuses on the analysis of qualitative dependent variables to predict the probabilities for three distinct labor market decisions. The sample is further stratified to capture the effects of age on a married woman's labor market decision. A clearer picture of part-time employment should provide important insight into the labor market decisions of married women.     

Full wages,part-time employment and the minimum wage

The economic effects of the minimum wage have become increasingly ambiguous. Historically, economists have asserted that increases in the minimum wage result in increases in unemployment. This relationship has been challenged recently by Card and Krueger, Katz and Krueger, and Card. These authors have provided empirical evidence that seems to indicate that there is no relationship between various economic variables (such as level of employment, and product price, among others) and the minimum wage. In addition, these authors have not provided a cogent presentation of the effects of the minimum wage on part-time employment. This study examines, from a theoretical standpoint, the effects of the minimum wage on employment. Furthermore, we emphasize the distinction between money wages and full wages; and the role that part-time employmentplays in the analysis. After incorporating these factors into a theoretical presentation, we provide empirical evidence by way of an OLS regression. We conclude that firms respond to increases in the minimum wage by altering the level of part-time employment. By doing this, firms are able to absorb the minimum wage increase because part timers receive fewer fringe benefits.     

Dynamic effects of labor supply: A mechanism explaining cross-sectional differences in hours

This paper first establishes the empirical fact that over the last quarter of the 20th century, the average weekly hours worked increased for workers in the highest wage quintile while it decreased for the ones at the lowest. In 1976, a worker in the lowest quintile worked 2.8 hours more per week than a high wage worker (worker in the highest quintile), but by 2006, the low wage worker worked 1 hour less. During this period, there was also a wide increase in wage inequality. The typical mechanism in which hours are only determined by contemporaneous wages cannot simultaneously explain the pattern found in both variables for every quintile.This paper attempts to reconcile these cross-sectional trends in both hours and wages for the US during this time period. As a first step, we show that compositional changes (in education, occupation and age) within quintiles can only explain a fraction of the observed pattern. Next, we propose a mechanism in which individuals' current decisions of how much to work take into account two components: the contemporaneous benefit of the wage received, and also how current hours worked affects the probability of moving across the wage distribution in later periods. The latter dynamic component is estimated from our dataset. We find that changes over time in how hours affect these probabilities provided incentives that differ across the quintiles, and are consistent with the labor supply decisions observed in the data. We incorporate these two components into an equilibrium model of heterogeneous agents with uninsurable income risk. We are able to replicate the decline in hours for the bottom of the distribution as well as the increase at the top. The ratio of hours worked between the two groups delivered by the model also fits the trend found in the data.     

Earning Curves and Wage Curves

Using British county data for full-time male manual workers we extend earlier work to investigate wage and earning curves. We distinguish between total earnings and hourly wages for standard hours, uncontaminated by overtime premium. Using data from 1980–1995 we find that earnings behaviour is dominated by volatile hours in the short run, while wage growth is highly sensitive to the level of unemployment as in the classical Phillips curve with macro data. Macro evidence for sticky wages is thus confirmed at the local level, and the wage curve of rapid adjustment is rejected for normal hourly wages.     

Gender wage differentials and discrimination in Korea: comparison by knowledge intensity of industries

This study estimates the relative size of the non-productivity-related gender wage gap across industries with differing knowledge intensities. More specifically, a gender wage premium was estimated from a modified Mincerian earnings equation, and an Oaxaca's discrimination coefficient was computed. Empirical evidence indicates that gender wage differentials tend to be less subject to potential discrimination in knowledge-based industries than in other industries with lower knowledge intensity. The estimated discrimination effect is least noticeable in top hierarchical occupations such as professionals and technicians, while it is most sizeable in production workers and sales/service workers, regardless of industrial affiliation.     

Market wages,reservation wages,and retirement decisions

The paper is an empirical cross-section study of the retirement decisions of American white men between the ages of 58 and 67, predicated on the theoretical notion that an individual retires when his reservation wage exceeds his market wage. Reservation wages are derived from an explicit utility function in which the most critical taste parameter is assumed to vary both systematically and randomly across individuals. Market wages are derived from a standard wage equation adjusted to the special circumstances of older workers. The two equations are estimated jointly by maximum likelihood, which takes into account the potential selectivity bias inherent in the model (low-wage individuals tend to retire and cease reporting their market wage). The model is reasonably successful in predicting retirement decisions, and casts serious doubt on previous claims that the social security system induces many workers to retire earlier than they otherwise would. The normal effects of aging (on both market and reservation wages) and the incentives set up by private pension plans are estimated to be major causes of retirement.     

‘Marginal employment’ and the demand for heterogeneous labour – elasticity estimates from a multi-factor labour demand model for Germany

We develop a structural multi-factor labour demand model which distinguishes between eight labour categories including marginal employment, i.e. low-paying jobs with only a few working hours and partially exempted from employee's social security contributions. Using a new panel data set for Germany, the model is estimated both for the number of workers and total working hours. For unskilled and skilled workers in full-time employment, we find labour demand elasticities similar to previous estimates. Our new estimates of own-wage elasticities for marginal employment range between??0.13 (number of male workers in West Germany) to??1 (working hours for women).     

Absenteeism in the workplace: results from Danish sample survey data

Absentee data is analyzed using a worker environmental survey carried out in 1995. In a model which distinguishes between discretionary and involuntary absences individuals are assumed to maximize expected utility. This generates a probability distribution of days absent per year which is a mixture of two negative binomial distributions representing the behaviour of two unknown types of agent. This distribution is estimated separately for men and women. For each gender the number of days absent is quite small relative to what researchers have found in other countries. In the empirical model we identify different effects of the explanatory variables for workers with low rates of absenteeism and workers with high rates of absenteeism.     

The returns to education and wage penalty from overeducation: New evidence from Vietnam

This study intends to estimate the rate of returns to education in Vietnam, the distributive effects of education on wages, and the wage penalty from the incidence of overeducation in the Vietnamese labor market during 2004–2016. This study employs a pseudo-panel approach to address omitted variables bias and the unconditional quantile regression to identify the heterogeneity of returns to education across the income distribution. Our main finding indicates that the estimated rate of returns to education in Vietnam is approximately 6.5%, showing a downward bias from previous estimates. The returns vary across wage distributions, where a lower rate of return is observed in lower quantiles and a higher rate among those individuals at the higher quantiles. The returns to education have declined since 2008, confirming the oversupply of highly educated workers in the Vietnamese labor market with an estimated wage penalty of 17%. Government assistance measures are needed to reduce the overeducation and the wage penalty issues in the Vietnamese labor market.     

Preference for job diversity,mixed part-time jobs and voluntary unemployment

This article introduces job diversity preference into Hoteling's location model to explain individuals' displeasure with work. The mixed part-time jobs (MPJ) can be regarded as more diversified products firms can offer at a higher cost. Individuals pay the product (jobs) with their productivity. We intend to explain: (a) Why some individuals prefer not to work in only single full-time jobs (SFJ) cases; (b) Why allowing free MPJ can be a good idea; (c) How MPJ wage floor and ceilings can block or hinder the effect of the MPJ market. (d) What the government can do to improve employment and social welfare. Bringing Hoteling's model into the labour market to demonstrate individuals' preferences on job diversity is the major innovation of this article.     

Technological Change and Wages in China: Evidence from Matched Employer–Employee Data

The relationship between research and development (R&D) intensity and wages is examined using a unique matched employer–employee dataset. The ordinary least squares estimates suggest that a one standard deviation increase in R&D intensity is associated with an increase in the hourly wage rate between 3.4% and 6.9% for the full sample, depending on the exact specification. The instrumental variable estimates are that a one standard deviation increase in R&D intensity is associated with an increase in the hourly wage rate between 5.5% and 11.4%. The wage elasticity with respect to R&D intensity is found to be higher in larger firms as well as for better educated workers and workers with technical skills. Consistent with the rent‐sharing hypothesis it is also found that the wage elasticity with respect to R&D intensity is higher for workers who belong to the Communist Party or union.     

After work shopping? Employment effects of a deregulation of shop opening hours in the German retail sector

This study investigates the impact of a deregulation of shop opening laws on employment in the German retail sector. Exploiting the gradual change in the opening times of shops across states and using data from the German Socio-Economic Panel, difference-in-differences estimates indicate an average increase in the employment probability, driven by a rise in the likelihood of working marginal part-time hours. Workers in small firms are likely to experience a reduction of their propensity to work. For individuals facing high family-related, supply-side constraints, the change in shop opening hours has opposing effects on employment — positive on lower and negative on upper parts of the hours distribution. Overall, the deregulation is estimated to have raised the likelihood of working fewer hours than desired by the workers.