Wage changes through job mobility in Europe: A multinomial endogenous switching approach

This paper presents evidence on the relationship between job mobility and wage mobility for various European countries using the European Community Household Panel (1994–2001). While much of the earlier research uses least-squares regression to predict wages for individuals with different labour market experience, we have found that it is important to take into account the possible non-random selection between job movers and stayers and between voluntary and involuntary movers. In this paper we focus on the effects of an unemployment spell on subsequent wages by estimating a multinomial endogenous switching model composed of two selection equations and three wage equations. Our results indicate that job mobility through unemployment has negative returns in all the analysed economies. As regards stayers, these losses range from 8% in Portugal to 21% in Germany while losses with respect to voluntary movers vary from 14% in Spain to 31% in Portugal.     

Is Child Work Necessary?*

This article investigates the hypothesis that child labour is compelled by poverty. It shows that a testable implication of this hypothesis is that the wage elasticity of child labour supply is negative. Using a large household survey for rural Pakistan, labour supply models for boys and girls in wage work are estimated. Conditioning on non-labour income and a range of demographic variables, the article finds a negative wage elasticity for boys and an elasticity that is insignificantly different from zero for girls. Thus, while boys appear to work on account of poverty compulsions, the evidence for girls is ambiguous.     

East–West migration and gender: Is there a differential effect for migrant women?

This paper examines whether female East–West migrants in Germany face a differential effect on their labor market outcomes after they move compared to both males and stayers. It builds on a “difference-in-difference-in-difference” approach, employs a matching procedure to define the corresponding before and after periods for movers and stayers and uses panel data techniques to difference away time-invariant unobservable confounders. I find that migrant women after migration do not experience significantly different earnings or employment prospects, compared to migrant males and female stayers. They do, however, face an additional negative effect on hours worked and on annual income. The results also suggest that for them, the income effect seems to dominate the substitution effect and they substitute some market work in the West with home production, in particular, with childcare.     

Average treatment effects for stayers with correlated random coefficient models of panel data

Correlated random coefficient (CRC) models provide a useful framework for estimating average treatment effects (ATE) with panel data by accommodating heterogeneous treatment effects and flexible patterns of selection. In their simplest form, they lead to the well-known difference-in-differences estimator. CRC models yield estimates of ATE for “movers” (i.e., cross-sectional units whose treatment status changed over time) while ATE for “stayers” (i.e., cross-sectional units who retained the same treatment status over time) are not identified. We study additional restrictions on selection into treatment that lead to the identification of ATE for stayers by an extrapolation from quantities identified by the CRC model. We discuss estimation and testing of the extrapolation's validity, then use our results to estimate the returns to agricultural technology adoption among maize farmers in Kenya.     

Tax enforcement policies,tax evasion and time allocation

Several studies examine the effect of tax rates on households’ labor supply decisions in attempts to account for observed differences in work hours across countries. Interestingly, these studies fail to consider a fundamental action associated with taxation: tax evasion. This paper introduces, into a general equilibrium model of household labor supply, the possibility that households can evade labor income taxes. We show that the relationship between tax-enforcement policies, the elasticity of substitution between consumption and leisure and the elasticity of substitution between formal and informal work is key to explain formal labor supply in major OECD countries. In a model without informal work, there is a positive relationship between the elasticity of substitution and the tax rate on formal income and people tend to work more. This is the case for the United States, Greece, Finland and the United Kingdom. This relationship becomes negative once informal activities are introduced and the model can explain formal labor supply better in countries where agents work relative less, i.e., in Austria, Denmark, France, Germany, Spain, Norway and Sweden. We also obtain estimates of hours worked in the informal sector for these countries.     

Labour supply and commuting time: An empirical study

We estimate a simple labour supply model that incorporates commuting time in a utility maximizing framework. Housing prices are assumed to vary with commuting time, and the elasticity of housing prices with respect to the latter is estimated to be about 10 percent. Using this elasticity estimate the price of commuting time averaged over all individuals is $3.22 while the wage rate is $4.72; thus commuting time is implicitly valued at about two-thirds of the wage rate on average. As far as work hours are concerned, almost all individuals are on the backward bending part of their labour supply curve.     

Egyptian men working abroad: Labour supply responses by the women left behind

Female labour force participation has remained low in Egypt. This paper examines whether male international migration provides a leeway for women to enter the labour market and/or to increase their labour supply. In line with previous studies, we find a decrease in wage work particularly in urban areas. However, women living in rural areas and affected by migration are much more likely to be employed in non-wage activities (i.e. unpaid family work) and subsistence work compared to women in non-migrant households. Furthermore, we find evidence that this labour supply response is driven by the household's need to replace the migrant's labour rather than by a loosening of a financing constraint on family enterprises made possible by the flow of remittances.     

Is tax progression really good for employment? A model with endogenous hours of work

This paper discusses the effect of tax progression on wage setting and employment in a unionised labour market. Recent contributions to this field argue that tax progression paradoxically enhances employment if wage setting is subject to collective bargaining. In this literature, individual hours of work are usually assumed to be exogenously given. We show that the positive employment effect of tax progression can be generalized to a model with a positive labour supply elasticity of individual workers. However, the wage-moderating effect of tax progression does not unambiguously carry over to a world where the union may fix both wages and individual hours of work. In this framework, the union reacts to tax progression by cutting individual working time. The wage rate, however, may decrease or increase. If the wage rate increases, the number of employed workers may decline despite the reduction in hours of work.     

Sectoral labour supply,choice restrictions and functional form

In this paper we discuss a general framework for analysing labour supply behaviour in the presence of complicated budget and quantity constraints, of which some are unobserved. The individual's labour supply decision is viewed as a choice from a set of discrete alternatives (jobs). These jobs are characterized by attributes such as hours of work, sector‐specific wages and other sector‐specific aspects of the jobs. The labour supply model for married women is estimated on Norwegian data. Wage elasticities and the outcome of a tax reform experiment show that overall labour supply is moderately elastic, but these modest overall responses shadow for much stronger inter‐sectoral changes. Our model is compared with a discrete choice model in which the utility is assumed to be a polynomial. We show that our estimated model has a more economically sensible interpretation and fits the data as well as the alternative approach. Copyright © 2006 John Wiley & Sons, Ltd.     

Production Technology Estimates and Balanced Growth

Capital‐labour substitution and total factor productivity (TFP) estimates are essential features of many economic models. Such models typically embody a balanced growth path. This often leads researchers to estimate models imposing stringent prior choices on technical change. We demonstrate that estimation of the substitution elasticity and TFP growth can be substantially biased if technical progress is thereby mis‐specified. We obtain analytical and simulation results in the context of a model consistent with balanced and near‐balanced growth (i.e. departures from balanced growth but broadly stable factor shares). Given this evidence, a constant elasticity of substitution production function system is then estimated for the US economy. Results show that the estimated substitution elasticity tends to be significantly lower using a factor‐augmenting specification (well below one). We are also able to reject conventional neutrality forms in favour of general factor augmentation with a non‐negligible capital‐augmenting component. Our work thus provides insights into production and supply‐side estimation in balanced‐growth frameworks.     

The causal effect of the number of children on gender‐specific labour supply elasticities to the firm

We estimate the effect of the number of children on the female and the male wage elasticities of labour supply to the firm using instrumental variables estimation in data from the US Current Population Survey (2000–19). Parents' number of children is instrumented with the sex mix of their first two children. We find that the male wage elasticity of labour supply to the firm significantly increases with the number of children, while the female elasticity is not significantly altered. That is, we find evidence that male labour markets become more competitive with the arrival of children. Our results also show that firms have substantial monopsonistic power and, in line with the monopsony theory of the gender pay gap, that male labour markets are more competitive than female markets.     

With a little help from abroad: The effect of low-skilled immigration on the female labour supply

We examine whether and how the inflow of female immigrants who specialize in household production affects the labour supply of Italian women. To identify the causal effect, we exploit the family reunification motives and network effects (i.e., the tendency of newly arriving female immigrants to settle in places where males of the same country already live) which is used as an instrument for the geographical distribution of female foreign workers. We find that when the number of immigrants who provide household services is higher, native Italian women spend more time at work (intensive margin) without affecting their labour force participation (extensive margin). This impact is concentrated on highly skilled women whose time has a higher opportunity cost. These results also hold after a battery of robustness checks. We present some further evidence that is also consistent with the idea that the impact works through substitution in household work rather than complementarities in the production sector. Finally, we show that immigration arises as a substitute to publicly provided welfare services, although this phenomenon raises concerns regarding the fairness and sustainability of this private and informal welfare model.     

Testing the intertemporal labor supply model: are jobs important?

The neoclassical life-cycle labor supply model assumes that hours of work are determined by labor supply choices alone and does not include a role for employers or job distinctions. An alternative model in which employers have an interest in employee hours and changing jobs is costly may reconcile weak and conflicting evidence regarding the neoclassical model. An important implication of such an alternative is that individuals may face hours constraints on a job and thus can choose hours freely only between jobs. This paper tests several implications of the neoclassical model against this alternative model of hours determination. Using a unique panel of individuals and jobs constructed using data on women from the 1988–1992 Panel Study of Income Dynamics, I compare hours variances and labor supply elasticities measured within and between jobs. Results provide some evidence against the neoclassical model and suggest that ignoring the role of employers in determining hours of work can lead to downward bias in estimates of labor supply elasticities.     

Shortages in an ageing labour market: an analysis of employers' behaviour

Different policies are being promoted to increase the labour supply in ageing labour markets. This article presents the results of a large-scale survey carried out among Dutch employers into their management of the constraints presented by a tight labour market. Organizations take different measures in response to staff shortages, which can in fact be distinguished as four strategies. The first relates to the recruitment of new groups of workers: groups that traditionally were perhaps not a preferred choice. The principal measures in this strategy are the recruitment of women and ethnic workers, and to a lesser extent the elderly. The second strategy focused on increasing the labour supply of existing workers. Overtime, encouraging part-timers to work extra hours and a structural increase in the length of the working week were part of this strategy. The measures constituting the third strategy were of a different type. Generally, these measures were adopted in order to cope with temporary peaks. Work was outsourced, a recruitment agency used, and higher wages offered to try to fill a vacancy. The fourth strategy focused on substituting technology/capital for labour. Regression analyses is carried out to explain which strategies organizations use to deal with shortages.     

Regression‐Kink Approach for Wage Effect on Male Work Hours

In finding the effect of after‐tax wage rate on work hours, the main difficulty is the endogeneity of after‐tax wage rate that equals ‘one minus average tax rate’ times wage rate. To overcome this endogeneity problem, we take advantage of jumps in the marginal income tax rate, which is a regression discontinuity (RD) idea. This RD, in turn, makes the average income tax rate ‘kink‐continuous’, which is a regression kink (RK) idea. We provide a simple economic model resulting in the RD and RK features, explain how to implement RK in practice, and then apply our methods to Korean male data. Our main RK‐based labour supply elasticity estimate 7.16% turned out to be insignificant with t‐value 1.52, but it is much larger than most estimates in the literature. This may be attributed to, among other things, the facts that the RK instrument is unique, that RK identifies only the local elasticity at the kink point and that RK requires large data as regression derivatives are estimated.     

Tax evasion and work in the underground sector

A bivariate random effect panel data model is estimated for male labour supply in the taxable and the non-taxable sectors in Denmark. The wage rates and non-labour income have significant effects on labour supply in both sectors. The average own wage elasticity with respect to underground labour supply is found to be small, 0.02, while the cross price elasticity from regular wages is larger, − 0.52. Simulations of potential tax reforms show that a reduction of the marginal taxes has minor effects on male labour supply to the untaxed sector, while the effect on male labour supply to the taxed sector is larger.     

THE LABOUR FOOTPRINT: A FRAMEWORK TO ASSESS LABOUR IN A COMPLEX ECONOMY

As addressing labour becomes crucial in the move towards sustainability, there is the need for assessment tools suitable for current complex economic systems. This article presents an input–output based framework (‘labour footprint’) for evaluating labour issues behind the production of different economic commodities, including entire supply chains. In line with the guidelines of the International Labour Organization, six labour issues are considered: collective bargaining, forced labour, child labour, gender inequality, hazardous work, and social security. This conceptual article sets to (a) define this footprint's labour dimensions, (b) cite relevant data sources, (c) describe its calculation, (d) illustrate its application through a case study, and (e) discuss this framework's relevance from ‘conscious consumption’, ‘supply chain responsibility’, and regulators' standpoints. Since it advances the evaluation of fundamental labour issues and the scope of multi-criteria analyses, this footprint may be a valuable tool for sustainability assessments.     

Semiparametric three‐step estimation methods for simultaneous equation systems

This paper proposes a new method for estimating a structural model of labour supply in which hours of work depend on (log) wages and the wage rate is considered endogenous. The main innovation with respect to other related estimation procedures is that a nonparametric additive structure in the hours of work equation is permitted. Though the focus of the paper is on this particular application, a three‐step methodology for estimating models in the presence of the above econometric problems is described. In the first step the reduced form parameters of the participation equation are estimated by a maximum likelihood procedure adapted for estimation of an additive nonparametric function. In the second step the structural parameters of the wage equation are estimated after obtaining the selection‐corrected conditional mean function. Finally, in the third step the structural parameters of the labour supply equation are estimated using local maximum likelihood estimation techniques. The paper concludes with an application to illustrate the feasibility, performance and possible gain of using this method. Copyright © 2005 John Wiley & Sons, Ltd.     

Labour supply in Italy: an empirical analysis of joint household decisions,with taxes and quantity constraints

This study applies an econometric framework which allows for complex non-convex budget sets, highly non-linear labour supply curves and imperfect markets with institutional constraints. A married couple's version of the model is estimated on Italian microdata. The empirical results show that male labour supply is rather inelastic while labour supply among females, especially participation, is considerably more elastic. The elasticities depend strongly on household income. The largest elasticities are found for females living in poor households. The results of the tax simulations suggest that there are only modest labour supply responses from replacing the 1987 system by proportional taxes. Copyright © 1999 John Wiley & Sons, Ltd.     

Feminisation of the medical profession: a strategic HRM dilemma? The effects of family‐friendly HR practices on female doctors' contracted working hours

Health‐care institutions face a strategic HR dilemma. They need to attract female doctors from a tight, feminised labour market by offering family‐friendly HR practices (e.g. part‐time employment), often based on collective labour agreements, while trying to contain their labour costs by employing as many full‐timers as possible. In this study, we investigate which family‐friendly arrangements serve health‐care institutions' HR strategies best in terms of retaining female doctors' working hours. Data collected in 2008 from 1,070 Dutch female doctors indicate that offering family‐friendly HR practices such as flexible working hours (in contrast to part‐time working) minimise the strategic HR dilemma, since it offers scope for improving the work–life balance without encouraging female doctors to work less hours. However, the effect of family‐friendly arrangements on working hours is dependent on the family‐friendly workforce philosophy: only with proper support for career goals do women using family‐friendly arrangements work more hours.