Labor supply with stochastic wage rate and non-labor income uncertainty

This paper deals with the labor supply problem in the contemporaneous presence of wage rate and non-labor income uncertainties. We examine the effect of a stochastic wage rate(a non-labor income uncertainty) on labor supply in the presence of a non-labor income uncertainty(a stochastic wage rate) and provide some conditions of utility function for assuring larger labor supply. We study the joint effect of two types of uncertainty on labor supply when two risks are either small or positive quadrant dependent. Our work extends the previous model of labor supply to two-risk framework and shows some new explorations on the classical issue of labor supply under uncertainty.     

我国工资差异变化及影响因素分析——基于家计调查的实证研究

尽管中国在经济转型过程中取得了令世人瞩目的经济增长速度,但随之而来的是不断扩大的工资收入差异和持续扩大的工资收入差距引发了广泛关注.一般认为,工资差距过大对社会公平和正义造成伤害,并直接影响中国经济和社会的可持续发展.基于家计调查数据并使用经济计量模型分析方法,本论文对中国在过去二十年日益增长的工资差距进行实证分析并探讨影响工资差距的主要因素.研究表明,政府对劳动力市场机构特别是工资政策改革是引发工资差距不断扩大的原因之一.本论文指出,劳动力市场机构的变化不是造成工资差异扩大的唯一因素;其它重要因素包括劳动力市场歧视以及制度性障碍,如中国现行的户口政策造成的劳动力市场分割等.本论文还从政策层面对减少工资差异提出建议.     

最低工资制度能提高民营企业劳动收入占比吗

本文以民营企业要素投入行为为切入点,探讨最低工资制度对民营企业劳动收入占比的影响。基于2005-2008年和2011-2013年中国工业企业数据库民营企业面板数据的研究发现：最低工资制度提高了劳动密集型和资本密集型行业民营企业的劳动收入占比,降低了技术密集型民营企业的劳动收入占比。通过分解影响机制发现,最低工资制度提高了劳动密集型和资本密集型民营企业的工资水平,带来正向的收入效应,但也导致资本替代劳动,产生负向的替代效应。整体而言,最低工资制度提高了民营企业的劳动收入占比。为发挥最低工资制度对民营企业劳动收入占比的正向作用,继续调整最低工资标准、贯彻相关法规实施、提高劳动者技能水平成为重要措施。     

Is the Optimal Labor Income Tax Progressive in a Unionized Economy?*

This paper concerns optimal nonlinear labor income taxation in an economy with union wage setting and endogenous hours of work. The purpose is to study the determinants of tax progression. We show that the optimal degree of progression of the labor income tax depends on the extent to which the government can influence the wage rate via tax policy as well as on its ability to redistribute income across individuals. In addition, the argument for progressive labor income taxation depends on whether hours of work are chosen by the employed themselves or the union.     

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.     

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.     

Assessment of the effects of targeted poverty alleviation policy on differently poverty-stricken households: A multi-propensity score weighting model

Eliminating poverty is a multifaceted global challenge and a focal point of global development governance. With the implementation of targeted poverty alleviation (TPA), China's poverty alleviation efforts have had significant achievements. This study provides a new perspective by classifying poverty-stricken households based on poverty root causes at the household level, a multi-propensity score weighting model based on counterfactual inference is employed to examine the poverty reduction effect and policy precision on six non-equivalent poverty-stricken household groups in a Chinese county. The results reveal that the poverty reduction effects differed among poverty-stricken households with different root causes of poverty. Specifically, households impoverished due to disability have the lowest income of the six groups. The assistance policy effects also vary significantly and are found to be poorly suited to poverty-stricken households a lack of labor force and funds. A robustness test confirms this conclusion and a more nuanced analysis reveals that these differences are reflected in the wage and transfer incomes. Therefore, to ensure the stability of poverty reduction and the sustainability of income for poverty-stricken households, relevant associated aid policies need to place different emphases based on their household characteristics.     

International diversification and industry-related labor income risk

Do equity markets help diversifying away industry-related labor income risk? This paper reconsiders the hedging role of stock markets by focusing on international equity diversification, rather than domestic asset allocation, and on industry wage, rather than individual labor income. We compare industry-based portfolio holdings to the one that is optimal for an investor endowed with the average home-country labor income. Our results resurrect the role of equities in hedging wage risk by uncovering remarkable heterogeneity across industries within each investing country. Our analysis also delivers insights concerning the role of occupational pension funds in designing optimal portfolios for their members.     

Education,mobility and the college wage premium

Motivated by large educational differences in geographic mobility, this paper considers a simple dynamic extension of Roy׳s (1951) model and analyzes it using new evidence on net versus excess mobility and the individual-level relationship between mobility and wages. According to the model, the dispersion of a labor income shock specific to a worker-location match is greater for more educated workers and accounts for large educational differences in mobility. In the model, labor mobility raises both the average wage and the college wage premium, a prediction consistent with differences between Europe and the U.S.     

Skilled-unskilled wage inequality and unemployment: A general equilibrium analysis

The paper develops a static three sector competitive general equilibrium model of a small open economy in which skilled labor is mobile between a traded good sector and the non-traded good sector and unskilled labor is specific to another traded good sector. Capital is perfectly mobile among all these three sectors. We introduce involuntary unemployment equilibrium in both the labor markets and explain unemployment using efficiency wage hypothesis. We examine the effects of change in different factor endowments and prices of traded goods on the unemployment rates and on the skilled-unskilled relative wage. Also, we introduce Gini-Coefficient of wage income distribution as a measure of wage income inequality; and show that a comparative static effect may force the skilled-unskilled relative wage and the Gini-Coefficient of wage income distribution to move in opposite directions in the presence of unemployment.     

Labor supply,uncertainty, and efficient taxation

We analyze the structure of an optimal linear income tax when workers are uncertain about their wages at the time they choose their labor supplies. Background for the normative analysis is provided by an outline of the positive theory of wage taxation and labor supply under uncertainty. It is then shown that given imperfect information about wages, lump-sum taxation is not necessarily efficient. Because a wage tax reduces the riskiness of wage income, some combination of a lump-sum tax and a wage tax generally will minimize excess burden.     

Hourly wage rate and taxable labor income responsiveness to changes in marginal tax rates

Recently, a voluminous literature estimating the taxable income elasticity has emerged as an important field in empirical public economics. However, to a large extent it is still unknown how the hourly wage rate, an important component of taxable income, reacts to changes in marginal tax rates. In this study we use a rich panel data set and a sequence of tax reforms that took place in Sweden during the 1980s to estimate the elasticity of the hourly wage rate as well as the taxable labor income elasticity with respect to the net-of-tax rate. We also estimate elasticities with respect to the non-labor income in a way that is novel in the literature. While carefully accounting for the endogeneity of marginal tax rates we find a statistically significant response in wage rates both among married men and women. The estimates of the hourly wage rate elasticity with respect to the net-of-tax rate fall in the range of 0.14–0.16 for males and 0.41–0.57 for females, whereas the corresponding taxable labor income elasticity estimates hover between 0.19–0.21 for males and 0.96–1.44 for women. Moreover, for men we find that the taxable labor income elasticity with respect to non-labor income is statistically significant; the point estimate being ? 0.07. This implies that the compensated taxable labor income elasticity is about 5 percentage points higher than the uncompensated one. In general, we consider the estimates for males to be more certain and robust than the estimates for females.     

劳动工资理论的误区及其矫正

劳动要素所得过低是导致我国收入分配差距过大的重要因素.所谓劳动力成本低廉的竞争优势,在很大程度上是挤压了劳动者合理的生存工资、生活条件和最基本的社会保障而形成的.这是新古典经济学市场竞争决定收入分配从而决定雇佣环境带来的后果,走出这一误区就需要在认识这些理论缺陷的同时补上遗漏的工资理论信息,为改变劳动报酬偏低的收入分配格局提供理论支撑和政策导向.     

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.     

劳动力转移与工资差距同时扩大的“悖论”研究——基于市场分割的视角

从市场分割的角度出发,对劳动力流动与工资差距同时扩大的"悖论"和中国市场化过程中的"迁移谜题"进行了深入分析,认为劳动力市场的地区分割和城乡分割导致了劳动者之间必然存在工资收入差距,而且即使存在劳动力转移,也不能使工资差距收敛。这种制度性偏好导致的劳动力市场分割,对劳动者工资收入差距的扩大起了推波助澜的作用,因此构建全国统一、自由竞争的劳动力市场是非常必要的,并提出有关的政策建议。     

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 contribution of minimum wage valorization policy to the decline in household income inequality in Brazil: A decomposition approach

There is a vast literature that estimates the effect of the minimum wage on wage inequality in various countries. However, as the minimum wage directly affects nonlabor income of families in some countries (in the Brazilian case via the benefits of the pension system and of certain social programs), this article extends the empirical analysis by studying the effects of the minimum wage on the level of inequality of household income as a whole. To accomplish that we employ a decomposition method that gauges the contribution of the increases in the minimum wage that occurred in recent decades in Brazil through the labor and nonlabor sources of household income. The results show that the minimum wage had a contribution of 64 percent to the observed fall in income inequality between 1995 and 2014 and that pensions were the most relevant channel over this period.     

Economic Integration and Regional Income Inequalities: Competing Dynamics of Regional Wages and Innovative Capabilities

A factor‐price difference scenario has recently been used by Krugman and Venables and by Puga to explain why, in the absence of labor migrations, economic integration should first produce and then dissolve regional income inequalities. The authors question this scenario in a dynamic analysis framework that extends the Baldwin, Martin, and Ottaviano ones to allow for regional wage differences. In this context, wage flexibility is no more a sufficient condition to induce long‐run convergence. Indeed, when regions are equally sized, the innovative capability advantage of the “core” outweighs the wage cost advantage of the “periphery” even for very low transport costs, and regional wage gaps are likely to persist in the long run.     

个人特征还是行业特征——吉林省行业工资差异的成因研究

基于统计年鉴宏观数据和吉林省劳动力市场状况调查微观数据,采用两步骤回归模型分析吉林省行业间工资差异的成因。结果发现,个人特征对吉林省行业工资回报具有正向作用;行政垄断等行业特征变量对吉林省行业工资差距同样产生正向影响。可见,个人特征和行业特征都是行业间工资差异形成的原因,相比之下,行业特征因素更为显著。因此,政府在调控现阶段行业间工资回报差异方面,更应该倾向于关注行政垄断带来的工资差异。     

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.