Accounting for wage and employment changes in the US from 1968–2000: A dynamic model of labor market equilibrium

In this article, we present a unified treatment of and explanation for the evolution of wages and employment in the US over the last 30 years. Specifically, we account for the pattern of changes in wage inequality, for the increased relative wage and employment of women, for the emergence of the college wage premium and for the shift in employment from the goods to the service-producing sector. The underlying theory we adopt is neoclassical, a two-sector competitive labor market economy in which the supply of and demand for labor of heterogeneous skill determines spot market skill rental prices. The empirical approach is structural. The model embeds many of the features that have been posited in the literature to have contributed to the changing US wage and employment structure including skill-biased technical change, capital-skill complementarity, changes in relative product-market prices, changes in the productivity of labor in home production and demographics such as changing cohort size and fertility.     

Wage inequality, technology and trade: 21st century evidence

This paper describes and explains some of the principal trends in the wage and skill distribution in recent decades. Increases in wage inequality started in the US and UK at the end of the 1970s, but are now widespread. A good fraction of this inequality trend is due to technology-related increases in the demand for skilled workers outstripping the growth of their supply. Since the early 1990s, labor markets have become more polarized with jobs in the middle third of the wage distribution shrinking and those in the bottom and top third rising. I argue that this is because computerization complements the most skilled tasks, but substitutes for routine tasks performed by middle wage occupations such as clerks, leaving the demand for the lowest skilled service tasks largely unaffected. Finally, I argue that technology is partly endogenous, for example it has been spurred by trade with China. Thus, trade does matter for changes in the labor market, but through a different mechanism than conventionally thought.     

Returns to Skills and the Distribution of Wages: Spain 1995–2010

In contrast to the pattern observed in other developed countries, the Spanish wage distribution compressed between 1995 and 2006 and became more disperse afterwards, so that in 2010 wage inequality was roughly similar to 1995. In this paper, we analyze the role of supply and demand factors when accounting for these facts. We start by decomposing observed wage changes into changes in the composition of the labour force and changes in the returns of workers' and jobs' characteristics. The results indicate that the compression of the wage distribution between 1995 and 2006 is largely explained by changes in returns, and particularly, by a decrease in the returns to education. We show that both the increase in the supply of high‐skilled workers and the increasing weight of low‐skilled occupations are related to the decreasing trend in the skill premium over this period. In contrast, the widening of the wage distribution after 2006 is largely explained by an increase in the relative demand for high‐skilled workers generating an increase in the school premium.     

Skill supply and biased technical change

This article contributes to the debate on skill-biased technical change by studying the dynamics of skill supply and wage inequality in an endogenous growth model with ability-biased technical progress. Due to a discouragement effect, rising within groups inequality reduces incentives to become educated for ordinary-ability workers. This mechanism generates a non-monotonic relationship between the growth rate and skill supply driving wage inequality upward during periods of accelerating technical change. This theoretical explanation is consistent with the apparent ambiguous relationship between the relative skill supply and inequality in the last decades in several OECD countries.     

Spatial wage disparities: Sorting matters!

Spatial wage disparities can result from spatial differences in the skill composition of the workforce, in non-human endowments, and in local interactions. To distinguish between these explanations, we estimate a model of wage determination across local labour markets using a very large panel of French workers. We control for worker characteristics, worker fixed effects, industry fixed effects, and the characteristics of the local labour market. Our findings suggest that individual skills account for a large fraction of existing spatial wage disparities with strong evidence of spatial sorting by skills. Interaction effects are mostly driven by the local density of employment. Not controlling for worker heterogeneity leads to very biased estimates of interaction effects. Endowments only appear to play a small role.     

Structure of the labour market and wage inequality: evidence from European countries

The aim of this paper is to explore how the structural changes that have occurred in the labour market, in terms of employment composition by skill levels, affect wage inequality in three developed countries of Western Europe that are in close geographical proximity but have disparities in their labour market characteristics. More precisely, the analysis compares, from an international perspective, France, Germany—whose labour markets have been characterised in recent years by job polarization and the upgrading of occupations, respectively—and Italy, where neither of the two phenomena can be clearly identified. Using EU-SILC (European Union—Survey on Income and Living Conditions) data, in the first step, RIF-regression (Recentered Influence Function) enables an exploration on the primary factors that are likely to explain the differences in generating personal labour earnings and, in the second step, a decomposition of the change in wage inequality between 2005 and 2013 to evaluate how much of the overall gap is accounted for by the endowments in employees’ individual characteristics (composition effect) rather than the capability of labour markets to transform these characteristics into job opportunities and earnings (wage structure). Regarding France and Germany, the main results highlight how the endowment effect plays a key role in decreasing or, at least, not increasing wage inequality, whereas in Italy the rising inequality may be due to the lower efficiency of the country’s labour market in creating job opportunities, better job-related careers, and higher-salaries for employees.     

The gender dimension of technical change and the role of task inputs

By 2011, the employment shares of UK graduate men and women had become equal for the first time. With no evidence of a significantly declining graduate female–male wage differential, this suggests that the relative demand for graduate women must have increased in order to accommodate the faster increase in their relative supply. However, gender clustering in degree subjects suggests that male and female graduates may not be perfect substitutes in production and therefore that gender biases may exist in the relative demand and supply of graduate labour. Consequently, this paper investigates whether industry level skill demand shifts have differed for men and women, focussing specifically on the role of technical change and job task inputs. The paper shows that, despite the large growth in the percentage of women obtaining a degree, overall women lost out from technical change between 1997 and 2006. This was most likely as a consequence of their lower quality numeracy and literacy skills, as well as other skills required to undertake the tasks that are correlated with technical change, especially in highly computerised private sector industries like finance and machine manufacturing.     

OFFSHORING, MULTINATIONALS AND LABOUR MARKET: A REVIEW OF THE EMPIRICAL LITERATURE

Abstract.  This paper reviews the empirical literature on the effects of offshoring and foreign activities of multinational enterprises on developed countries' labour markets. Results suggest that material offshoring worsens wage inequality between skilled and unskilled workers; it also seems to make employment more volatile, by raising the elasticity of labour demand and the risk of job losses. Service offshoring exerts at most small negative effects on total employment, and changes the composition of the workforce in favour of high-skilled white-collar employees. Multinationals tend to substitute domestic and foreign labour in response to changes in relative wages across countries; substitutability is weak, however, and mainly driven by horizontal, market-seeking foreign direct investments.     

Winners and losers after 25 years of transition: Decreasing wage inequality in Slovenia

Over the past twenty-five years, wage inequality has fallen in Slovenia, even as it has risen in most developed economies. The rates of return to education and work experience rose and remained high on average. However, rapid increases in the number of college graduates have outpaced the rising relative demand for skill among the youngest labor market entrants. As a result, the youngest cohorts of college graduates have experienced declining returns to education and a downward shift in their occupational distribution, which has not been experienced by older college graduates. These changes coincide with the implementation of the Bologna Reform, which reduced the length of time necessary to complete a bachelor’s degree and contributed to the incentives to attend college. Falling returns to tertiary education contributed to declining within-cohort wage inequality among the young, which was large enough to reduce overall wage inequality.     

Skill shortages and labor market outcomes in Central Europe

The new Central European members of the EU have been characterized by low employment rates, especially among unskilled workers, despite the GDP recoveries and large private sector shares in output and employment. Evidence points at skill shortages in Central Europe as a key impediment to faster labor reallocation and convergence to the EU-15 employment structures. In this paper, we develop a simple model of labor reallocation with transaction costs and show how skill shortages can inhibit firm creation and increase income inequality. We use the model to examine the impact of training subsidies and their financing on skill acquisition and start-ups of new private firms, and show that the positive effect of subsidies would be mostly offset by high wage taxes. Shifting financing from wage to consumption taxes would improve incentives for workers’ training and firm start-ups, while relying more on income taxes could reduce the income gap between workers and entrepreneurs.     

Progressive Taxes and the Labour Market: Is the Trade–off Between Equality and Efficiency Inevitable?

Does an income tax harm economic efficiency more the more progressive it is? Public economics provides a strong case for a definite ‘yes’. But at least three forces may pull in the other direction. First, low–wage workers may on average have more elastic labour supply schedules than high–wage workers, in which case progressive taxes contribute to a more efficient allocation of the total tax burden. Second, in non–competitive labour markets, progressive taxes may encourage wage moderation, and hence reduce the equilibrium level of unemployment. And third, if wage setters have egalitarian objectives, progressive taxes may reduce the need for redistribution in pre–tax wages, and hence increase the demand for low–skilled workers. This paper surveys the theoretical, as well as the empirical literature about labour supply, taxes and wage setting. We conclude that in a second best world, the trade–off between equality and efficiency is not always inevitable.     

Shifts in the Demand and Supply of Skills in the OECD: A Single‐Index Model with a Continuous Distribution of Skills*

This paper proposes a one‐dimensional index for the gap between the demand and supply of skills; this index can be estimated based on the labour market performance of groups defined with characteristics (e.g. education) that are only imperfectly correlated with labour market skills. Using data from five European countries and the US, we find that the relative demand for skills has increased more than the relative supply in the US and UK during the 1980s but not in other European countries. However, the gap between relative demand and supply increased in Italy and the Netherlands from the early 1990s.     

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.     

Relative wage and unemployment changes in Poland: microeconometric evidence

We estimate changes in the Polish wage and unemployment structures between the years 1994 and 1998 in order to identify labour market characteristics associated with increasing and decreasing relative demand, as well as relative wage rigidities. The evidence shows that relative demand for workers with a low level of education decreased. Whereas relative wages for workers with basic vocational education also fell in this situation, relative wages of workers with only primary education did not, pointing to a relative wage rigidity for this group which faced an above-average unemployment risk throughout the observation period.     

Outsourcing and computers: Impact on urban skill level and rent

Cities in the U.S. with a higher initial share of college graduates have had a greater subsequent increase in this share over the past two decades. Concurrently, housing prices have grown faster in these skilled cities. This paper argues that the diffusion of computers and outsourcing may partly explain these two phenomena. In the presented model, skilled workers are more productive in skilled cities and need unskilled support services. The cities' unskilled workers can perform the support services, but when it is cheaper, such services can be undertaken by computers or outsourced to less-skilled cities. New technologies facilitating computerization and outsourcing can increase the skill share and housing prices in skilled cities relative to less-skilled cities, under reasonable assumptions. The basic economics is that the new technologies diminish the demand for unskilled workers in skilled cities and permit skilled workers to earn higher wages, which in turn increases the supply of skilled workers in skilled cities and drives up housing prices. Empirically, this paper documents five stylized facts that the theory can rationalize. Particularly important is rising skill premium in skilled cities relative to less-skilled cities, which supports a production theory involving shifts in labor demand.     

The distributive and welfare effects of product and labour market deregulation

This paper studies the effects of product and labour market deregulation on wage inequality and welfare. By constructing an analytically tractable model in which the level of product market competition and the wages are endogenously distributed among sectors, I show that deregulation in goods market has mixed effects on inequality: the wage variance and the Gini index are lower, but the ratio of the highest over the lowest wage paid in the economy increases. Moreover, deregulation in labour markets raises the aggregate level of employment and the average real wage but reduces the welfare of trade unions in sectors with a low level of competition.     

The returns to skill

Since 1975, increases in the return to skill (measured by years of education), in the percentage of the labor force that is skilled, and in the variance of wage income within skill categories have characterized the U.S. labor market. The first two facts point towards an increase in the demand for skilled labor; the third fact establishes that this increase in demand has not been uniform for all members of a particular skill category. Hence, the three stylized facts point toward unobserved skill heterogeneity within education classes. In this paper, we argue that education per se does not measure skill adequately, and we suggest an alternative measure based on the observed skill characteristics of the job. We analyze the return to various dimensions of skill, including formal education. After accounting for other elements of skill, we find that the return to years of education has been constant since 1970. Moreover, variations in direct measures of skill, such as mathematical ability or eye-hand coordination, account for a substantial fraction of the increased dispersion in income among the college educated, and some of the increase in wage dispersion among those who have not earned a college degree.     

Wages,employment, labour turnover and the accessibility of local labour markets

In this paper, we extend a dynamic efficiency wage model to the case of multiple local labour markets that interact through migration. Firms are concerned about turnover costs. The quitting behaviour of workers is a function of local labour market conditions, non-wage income and the costs and benefits of migration to other local labour markets. A synthetic micro sample of 20,302 observations from the 1986, 1991 and 1996 New Zealand Censuses of Population and Dwellings provides evidence supporting the theory. Across subgroups, the wages of workers with relatively inelastic local labour supply and/or lower geographical mobility are relatively more responsive to changes in the local employment rate. The evidence is consistent with the notion that local employers engage in monopsonistic competition with respect to the employment of such workers.     

LABOUR DEMAND IN GERMANY BY INDUSTRIAL SECTOR,OCCUPATIONAL FIELD AND QUALIFICATION UNTIL 2025 – MODEL CALCULATIONS USING THE IAB/INFORGE MODEL

By means of a trend extrapolation of microcensus structures (undertaken by the German Federal Statistical Office) for the time period 1996–2007, the projections for labour demand by industrial sector which the IAB already has at its disposal can be transferred to demand by occupational field and subsequently by qualification level until 2025. The findings which have been claimed for some time now are upheld: production-related occupations will lose in significance, while further increases in employment particularly in occupations in the service sector are to be expected. Accordingly, the demand for personnel with a degree from a university or a university of applied sciences will go on rising, while the labour market opportunities for unskilled workers will continue to fall. However, vocational training or its academic counterparts still remain the dominant form of training in Germany. A continuing employment trend is to be expected here.     

An evolutionary model of industry dynamics and firms’ institutional behavior with job search, bargaining and matching

By combining features from distinct theoretical approaches, namely the evolutionary and the job search, matching and bargaining literatures, we propose a model that captures the main dynamics of a world where heterogeneous firms and workers interact and co-evolve. Within a micro-meso framework, the model focuses on the influence of firms’ labour choices (“institutional settings”) on industry dynamics, taking into account the existence of employment adjustment costs. The consideration of endogenous matching and bargaining processes in the labour market results in significant frictions, such as the simultaneous coexistence of unfilled job vacancies and unemployment. In a setting where technological progress is not biased a stylized fact of industrialized world economies in the last few decades emerges, the increasing wage inequality. Additionally, turbulence in the industry increases after a negative demand shock. As expected, the negative demand shock causes a decrease in the number of vacancies and, consequently, unemployment rates increase considerably. Interestingly, and mimicking the recent experiences of countries such as US, Spain, Greece and Portugal, the rise in unemployment is matched by a rise in contractual wages. This outcome is explained by the lower ability of the firms to fill their posted vacancies, which results from friction in the interactions among agents.