谁增加了劳动时间供给？——来自CHNS的证据

文章利用微观经济理论推导出低收入者在追求效用最大化和满足最低生存必需支出的约束条件下,低工资率时劳动供给曲线将向右下方倾斜。在此基础上,利用CHNS（2006）数据对其劳动供给时间进行了实证分析并进行解释,找出了工资率下降时增加劳动供给时间的劳动者个体特征。     

Reference Dependent Preference and Labor Supply: Evidence from China

This paper investigates the daily labor supply decisions of Hangzhou cabdrivers. We find that Hangzhou cabdrivers’ wage elasticity is significantly positive, their working decisions are largely affected by shift time, and crude proxy variables for income; hours targets can hardly explain their working behavior. Nevertheless, Hangzhou cabdrivers are still affected by reference dependent preference. Using new empirical strategies, we show that cabdrivers are more likely to continue working when wage rates are unexpectedly low and more likely to quit when wage rates are unexpectedly high.     

A simultaneous discrete choice model of labor supply and wages for married women in Switzerland

A simultaneous model of female labor supply and wages is estimated. The labor supply model is formulated as a trichotomous discrete choice model in order to take into account the bimodal distribution of observed working hours. For women without observed wages the probability of choosing the observed work category is integrated over all values of the wage. The model is estimated using a sample of married women in Switzerland. The budget constraint is constructed by computing the disposable income for each hours point, taking into account the Swiss income tax system. The estimation results imply relatively modest wage elasticities of expected labor supply for working women. On the other hand the elasticity of the participation probability with respect to wages for nonworkers is twice as large. The magnitude of the income elasticities is comparable to other studies. The wage elasticities obtained with two alternative estimation procedures are considerably lower. These results show that wage elasticities crucially depend on how the problem of unobserved wages is solved.     

A quantitative theory of the gender gap in wages

This paper measures how much of the gender wage gap over the life cycle is due to the fact that working hours are lower for women than for men. We build a quantitative theory of fertility, labor supply, and human capital accumulation decisions to measure gender differences in human capital investments over the life cycle. We assume that there are no gender differences in the human capital technology and calibrate this technology using wage–age profiles of men. The calibration of females assumes that children involves a forced reduction in hours of work that falls on females rather than on males and that there is an exogenous gender gap in hours of work. We find that our theory accounts for all of the increase in the gender wage gap over the life cycle in the NLSY79 data. The impact of children on the labor supply of females accounts for 56% and 45% of the increase in the gender wage gap over the life cycle among non-college and college females, while the rest is due to the exogenous gender differences in hours of work.     

最低工资对农民工劳动供给存在空间溢出效应吗？——基于空间面板Durbin模型的分析

通过空间面板杜宾模型分析最低工资对农民工劳动供给是否存在空间溢出效应。研究发现,最低工资对农民工劳动供给不存在空间溢出效应,主要表现为最低工资对农民工的就业不存在显著的空间溢出效应,对农民工工作时间存在显著消极的空间溢出效应。最低工资对女性农民工就业呈现出倒"U"型的影响,对男性农民工就业的影响不显著;最低工资对女性农民工和男性农民工工作时间呈现出倒"U"型的影响。     

Asymmetric labor supply

The estimation of labor supply elasticities has been an important issue in the economic literature. Yet all works have estimated conditional mean labor supply functions only. The objective of this paper is to obtain more information on labor supply, estimating a conditional quantile labor supply function. We use a sample of prime age urban males employees in Brazil. Two stage estimators are used as the net wage and nonlabor income are found to be endogenous to the model. Contrary to previous works using conditional mean estimators, it is found that labor supply elasticities vary significantly and asymmetrically across hours of work. While the income and wage elasticities at the standard work week are zero, for those working longer hours the elasticities are negative.     

Working capital requirement and the unemployment volatility puzzle

Shimer (2005) argues that a search and matching model of the labor market in which wage is determined by Nash bargaining cannot generate the observed volatility in unemployment and vacancy in response to reasonable labor productivity shocks. This paper examines how incorporating monopolistically competitive firms with a working capital requirement (in which firms borrow funds to pay their wage bills) improves the ability of the search models to match the empirical fluctuations in unemployment and vacancy without resorting to an alternative wage setting mechanism. The monetary authority follows an interest rate rule in the model. A positive labor productivity shock lowers the real marginal cost of production and lowers inflation. In response to the fall in price level, the monetary authority reduces the nominal interest rate. A lower interest rate reduces the cost of financing and partially offsets the increase in labor cost from a higher productivity. A reduced labor cost implies the firms retain a greater portion of the gain from a productivity shock, which gives them a greater incentive to create vacancies. Simulations show that a working capital requirement does indeed improve the ability of the search models to generate fluctuations in key labor market variables to better match the U.S. data.     

A low mobility model of wage discrimination—With special reference to sex differentials

The empirical predictions of all previous models of wage discrimination with which we are familiar are violated by observation. We propose a model whose implications are consistent with reality. The typical profit-maximizing strategy of a firm in our model is to hire both women and men, rather than to specialize in one labor type. When both are hired, the men's wage rate exceeds the women's. We assume that the labor supply curves for women and men have different slopes and that men dislike working with women equals or superiors.     

Lifetime aggregate labor supply with endogenous workweek length

This paper studies lifetime aggregate labor supply with endogenous workweek length. Such a theory is needed to evaluate various government policies. A key feature of our model is a nonlinear mapping from hours worked to labor services. This gives rise to an endogenous workweek that can differ across occupations. The theory determines what fraction of the lifetime an individual works, not when. We find that constraints on workweek length have different consequences for total hours than for total labor services. Also, we find that policies designed to increase the length of the working life may not increase aggregate lifetime labor supply.     

Has Abe's Womanomics Worked?

The present paper estimates the effect of the Abe Cabinet's Womanomics policies that aimed to increase female labor supply and keep women on a career path. The policies are surveyed, and the effects are estimated using microdata from the Labor Force Survey combined with data at the prefectural level on day care provision. A difference‐in‐difference (DD) method is applied to uncover the impacts of the Abe Cabinet's policies. The rapid increase in the provision of infant care, especially in the urban area, has contributed to a strong increase in the labor participation of mothers with young children. In addition, DD method estimates show a strong increase in mothers with infants staying in permanent‐contract regular employment. A significant shortening of work hours of workers, especially of parents with infants, is observed, which enabled working mothers to maintain their employment status. A change in the gender wage gap in the Japanese labor market is observed, but much progress is still required to close the large wage gap.     

Hours risk and wage risk: repercussions over the life cycle*

We decompose earnings risk into contributions from hours and wage shocks. To distinguish between hours shocks, modeled as innovations to the marginal disutility of work, and labor supply reactions to wage shocks, we formulate a life-cycle model of consumption and labor supply. For estimation, we use data on married American men from the Panel Study of Income Dynamics. Permanent wage shocks explain 31 percent of total risk, permanent hours shocks 21 percent. Progressive taxation attenuates cross-sectional earnings risk, but its life-cycle insurance impact is much smaller. At the mean, a one-standard-deviation hours shock raises lifetime income by 11 percent, a wage shock by 13 percent.     

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.     

Efficiency Wages and the Regulated Firm

This paper develops empirical tests of "efficiency-wage" hypotheses and applies these tests to data on a regulated firm. According to efficiency-wage theory, wage levels positively affect employee performance and, moreover, cost minimization requires that employers pay a wage premium above the supply price of labor. To explore these issues, we use company-level data to estimate production and quit functions that allow for efficiency-wage effects. Our empirical results support efficiency-wage theory: payment of a wage premium reduces the firm's quit rate, raises labor productivity, and lowers operating costs. These findings call into question the regulatory practice of disallowing labor expenses when the regulated firm's wage levels exceed market averages.     

Are long-term wage elasticities of labor supply more negative than short-term ones?

Standard models imply that the wage-elasticity of labor supply is more negative the longer a wage change lasts. I observe decreasing daily hours during short-term wage increases, but not during a long-term one: daily income goals adjusted in the long-term.     

The effects of stochastic wages and non-labor income on labor supply: update and extensions

The analysis of labor supply under risk has a long history dating back to Hicks (The theory of wages, St. Martin’s Press, New York, 2003) and Knight (Risk, uncertainty and profit, Kelly, New York, 1964). In the 1980s more technical papers investigated the impact of stochastic non-labor income and/or wage rate upon labor supply. In this paper, we show that the effect of a mean-preserving increase in risk in wage rate or non-labor income on labor supply is best understood as a special case of an Nth degree risk increase (as defined by Ekern (Econ Lett 6:329–333, 1980)) and the conditions for signing the effect of a higher-order risk increase in wage rate or non-labor income on labor supply are analogous to those for signing the effect of a simple non-stochastic decrease in wage rate or non-labor income. We thus extend, and provide new and more intuitive interpretations for, related earlier results.     

Conditional Earnings Subsidies for Low Earners

In order to be eligible for in-work tax credits, it is often not enough to have low earnings. In Ireland, New Zeand the United Kingdom, for example, for eligibility, it is also required that the number of hours worked is sufficiently high. Similarly, in Belgium and France, the hourly wage rate must be sufficiently low. In this paper, I provide a justification for such additional conditions. I analyze Pareto-efficient redistribution from high to low ability individuals in a model where labor has several intensive margins. Besides labor hours, labor effort – a vector of unpleasant, but productive features of labor – is also an object of choice. Effort and ability determine the hourly wage rate. I find that conditional subsidies on earnings for low earners are optimal: the earnings of low earners should be subsidized at the margin, but only if they earn more by working more hours at a sufficiently low wage rate.     

产业内贸易对中国技能 工资差距的影响

本文试图考察产业内贸易对技能工资差距的影响,理论分析表明：它随劳动力条件的变化而变化,在劳动力无限供给条件下它取决于技术劳动力的绝对需求,由于产业内贸易必能刺激技术劳动力的绝对需求,因此必然会扩大工资差距。但在劳动力条件转向有限供给后,它又取决于技术劳动力的相对需求,而产业内贸易未必使之扩大,特别是对两类劳动力替代弹性较大的部门来说,可能会使技术劳动力的相对需求下降,并使技能工资差距收缩。本文基于中国33个产业的5年面板数据验证了上述假说。     

TAXATION AND CENTRALISED WAGE SETTING: THE CASE OF ENDOGENOUS LABOUR SUPPLY

The implications of centralised wage setting for the relationship between taxation, wages and employment are studied allowing for endogenous adjustment in work hours. We show that centralisation promotes wage moderation, makes wages and employment less sensitive to changes in wage taxation and reduces the hours worked. With an individual supply of working hours, a wage tax can even improve employment if wage setting is centralised and marginal utility from a public good is sufficiently high. Moreover, if a profit tax is used to finance public expenditure, higher tax reduces wages and improves employment.     

The diffusion of computers and the distribution of wages

When the costs are decreasing workers adopt technology at the point where the costs equal the increased productivity. Output per worker increases immediately, while productivity benefits increase only gradually if costs continue to fall. As a result, workers in computer-adopting labor market groups experience an immediate fall in wages due to increased supply. On the other hand, adopting workers experience wage increases with some delay. This model explains why increased computer use does not immediately lead to higher wage inequality. More specifically, the results of the model are shown to be consistent with the question why within-group wage inequality among skilled workers as a result of computer technology adoption in the United States increased in the 1970s, while between-group wage inequality and within-group wage inequality among the unskilled did not start to increase until the 1980s. The model also predicts that the more compressed German wage structure leads to a lagged diffusion of computer technology along with smaller changes in wage inequality. Our empirical analysis suggests that this is consistent with the actual developments in Germany since the 1980s. Finally, the theoretical predictions seem to be of the right magnitude to explain the empirical quantities observed in the data.     

A wage-bargaining model for Denmark

Recent models of wage bargaining provide the background for formulating a wage-employment model which is estimated for the manufacturing sector in Denmark. Emphasis is laid on an interpretation of the empirical findings in a maroeconomic context. The major results are that wage setting is not characterized by money illusion, shorter working hours lead in the long run to full wage compensation and a fall in total number of hours worked, and expansionary demand management policies induce wage increases which eventually eliminate the expansionary effects on activity.