Investment-specific technological change, skill accumulation, and wage inequality

Wage inequality between education groups in the United States has increased substantially since the early 1980s. The relative number of college-educated workers has also increased dramatically in the postwar period. This paper presents a unified framework where the dynamics of both skill accumulation and wage inequality arise as an equilibrium outcome driven by measured investment-specific technological change. Working through equipment–skill complementarity and endogenous skill accumulation, the model does well in capturing the steady growth in the relative quantity of skilled labor during the postwar period and the substantial rise in wage inequality after the early 1980s. Based on the calibrated model, we examine the quantitative effects of some hypothetical tax-policy reforms on skill accumulation, wage inequality, and welfare.     

Product cycles, endogenous skill acquisition, and wage inequality

Abstract .  This paper presents an endogenous product cycle overlapping generations model, where the supply of skilled labour is endogenously determined. This is used to examine how production shifts through imitation by developing countries affect the domestic wage differential and supply of skilled labour in developed countries. In the model, production shifts increase the demand for researchers in developed countries and cause higher relative wages for skilled labour: this leads to more individuals acquiring the skills. As a consequence, the model helps to explain the simultaneous increase in the domestic wage gap and in the supply of skilled labour observed in developed countries.     

A note on schooling and wage inequality in the public and private sector

The few studies that have examined the wage impact of education across the earning distribution have focused on high-income countries and show education to be more profitable at the top of the distribution. The implication is that education may increase inequality. Extending the analysis to 16 East Asian and Latin American countries, in Latin America we observe a pattern similar to that of Europe/North America (increasing wage effects), while in East Asia the wage effects are predominantly decreasing by earnings quantile. However, once the analysis is performed separately for the public and the private sector, it is revealed that the strongly decreasing impact of schooling on earnings in the public sectors of East Asian countries is responsible for the overall observed decreasing pattern, while the impact of schooling on earnings in the private sectors of these countries is non-decreasing.     

Trade liberalisation,market competition and wage inequality in China's manufacturing sector

Economic reforms of the late 1980s have contributed to rapid economic growth in China. While the overall standard of living has improved, economic growth has also resulted in an increase in income inequality. Rising income inequality can increase social tensions that can impede further economic growth. By making use of firm level panel data, this paper focuses on the impact of increased market competition and trade liberalisation on skilled–unskilled wage inequality in China's manufacturing sector. A theoretical model is used to argue that trade liberalisation and market competition can affect skilled–unskilled wage inequality. Based on this result, an econometric model is specified. The empirical analysis presented in this paper shows that increased trade liberalisation has contributed to an increase in skilled–unskilled wage inequality in China's manufacturing sector. However, increase in market competition has the opposite effect.     

Factor‐biased public infrastructure and wage inequality

This paper analyzes how factor‐biased public infrastructure affects the skilled–unskilled wage inequality. In the basic model with a full employment economy, we find that when the weighted dependence of skilled labor and capital in the urban skilled sector on public infrastructure is large enough relatively to that of unskilled labor and capital in the urban unskilled sector, the wage inequality will be expanded. We also discuss labor‐biased and capital‐biased public infrastructure in our framework, and find that the relative dependences of relevant labor or capital on public infrastructure are important determinants of wage inequality. In the extended models, we analyze separately the issue of wage inequality in the economy with unemployment and the totally open capital market, and find the results of the basic model almost still hold.     

Learning-by-doing,technology-adoption costs and wage inequality

In the dominant literature, the technological-knowledge bias that drives wage inequality is determined by the market-size channel. We develop an endogenous growth model with two technologies in which: a specific quality of labour, low or high-skilled, is combined with a specific set of quality-adjusted intermediate goods; the market-size channel is practically removed; adoption costs and learning-by-doing are linked with labour endowments. By solving transitional dynamics numerically, we show that changes in the supply of labour affect learning-by-doing and technology-adoption costs, which, in turn, influence the technological-knowledge bias and thus wage inequality. The proposed mechanisms can accommodate facts not explained by the previous literature.     

The Vietnam reforms,change in wage inequality and the role of the minimum wage

The Vietnam ‘renovation’ reforms were implemented during the 1990s, but their full effect was only felt several years later. We present evidence on the developments in real wage growth and inequality in Vietnam from 1998 to 2008. Using a variety of approaches (traditional measures of inequality, comparison of density functions, decomposition of the change in real wage by sector as well as a detailed decomposition of the change in the Gini), we present a consistent picture: contrary to what one might have expected given the nature of the reforms, inequality declined sharply in the private sector (but not in the state sector). This study links these developments to the policy of aggressively increasing the minimum wage over the past several years, differences in implementation by sector as well as variation in the over‐time changes in minimum wage.     

Globalization,product differentiation,and wage inequality

Abstract This paper develops a two‐country, general equilibrium model of oligopoly in which the degree of horizontal product differentiation is endogenously determined by firms’ strategic investments in product innovation. Consumers seek variety and product innovation is more skill intensive than production. Stronger import competition increases innovation incentives, and thereby the relative demand for skill. An intra‐industry trade expansion following trade liberalization can therefore increase wage inequality between skilled and unskilled workers. As long as some industries remain shielded from international competition, the welfare implications of globalization are found to be generally ambiguous.     

The cyclicality of consumption,wages and employment of the public sector in the euro area

This study empirically examines the business cycle behaviour of public consumption and its main components, the public wage bill (including its breakdown into compensation per employee and public employment) and intermediate consumption, in the euro area aggregate, euro area countries and a group of selected non-euro area Organization for Economic Co-operation and Development (OECD) countries (Denmark, Sweden, the UK, Japan and the US). It looks across a large number of variables and methods, using annual data from 1960 to 2005. It finds robust evidence supporting that public consumption, wages and employment co-move with the business cycle in a pro-cyclical manner with 1–2 year lags, notably for the euro area aggregate and euro area countries. The findings reflect mainly the correlation between cyclical developments, but also point to an important role of pro-cyclical discretionary fiscal policies.     

Innovation diffusion,employment and wage policy

Contrary to most writings in the field of evolutionary economics which have a strong microeconomic flavor, here amacroeconomic evolutionary model will be presented in order to deal with themacroeconomic employment effect of technical change where there is just one old and one new technology. Several authors who favour an evolutionary approach to the theory of technical change share an optimistic view with respect to the macroeconomic employment effect of technical change. In the paper we are dealing with the question of whether this optimistic view is a necessary result of an evolutionary approach to technical change or rather of some other characteristic of the models used. It is shown that the evolutionary approach to technical change is not inherently optimistic or pessimistic with respect to the employment effects. Rather it is the labour market behaviour that will decide, whether the employment effects of technical change are positive, negligible or even negative.     

A microeconomic analysis of wage determination in the Canadian public sector

Using cross-section, micro wage rate data for the period 1967–1975, this paper analyses the extent to which price expectations, price ‘catch-up’, and labour market conditions affect the rate of change of base wage rates in the Canadian public sector. The results indicate that both price movements and labour market conditions do influence base wage rates in a manner that is not radically different from that in the private sector. The paper also explores the importance and significance of these factors when the data are disaggregated according to jurisdiction and method of contract settlement. The final section of the paper is devoted to an exploration of wage spillovers within the public sector and between the public and private sectors.     

Local flexibility in wage setting: evidence from the Norwegian local public sector

The public sectors in the Scandinavian countries have been prominent examples of centralized wage-setting systems. In Norway, more room for local flexibility was implemented by a wage frame system introduced in 1990 in which the national wage scale system merely works like a minimum wage system. We analyze the effect of this reform using a unique database where we can track employees and their local government over time and explore the consequences of controlling for fixed individual effects and fixed employer effects. We find that the wage dispersion increased across local governments after 1990, and that wages to some extent became more responsive to local government income, monopsony power and other local government characteristics after the reform. However, the numerical effects of the reform are estimated to be quite small.     

The minimum wage, employment, and the AS-IF methodology: A forecasting approach to evaluating the minimum wage

Out-of-sample employment forecasts for 33 U.S. industries which are likely to be sensitive to the federal minimum wage are, more often than not, more accurate when information about the minimum wage is not taken into account. This is true even in instances where this information improves wage forecasts. When employment forecasts conditional on the minimum wage are better, the improvement is typically small. These results are invariant to the number of workers previously making less than the new minimum wage, and to the value of the minimum wage relative to industry average wages. First version received: August 1999/Final version received: July 2000     

The evolution of wage inequality in Italy

This article analyses the evolution of inequality in yearly and daily wages between and within groups of blue and white collar, using the INPS-ISFOL database for the period 1985 to 1999 in Italy. Between-group inequality increased in the 1990s as clerical wages grew slowly, whereas blue collars' wages remained nearly constant. Within-group inequality increased only if measured by daily wages. The covariance structure analysis shows that inequality comes from persistent differentials among older workers and from high income volatility for younger cohorts. Within inequalities in office and manual workers are driven by the growth of permanency for the older cohorts (individual abilities, say experience, matter more) and by the growth of income volatility for the younger cohorts (luck in the labour market). Within each group, low paid workers during their career acquire earning gains for their abilities and reduce differentials with respect to high paid workers.     

Product variety,finite changes and wage inequality

This paper presents a model with product variety to examine the effects of emigration and capital mobility between the North and the South on production reorganization and two-sided wage inequality. We obtain conditions under which the production patterns in both North and South undergo ‘finite changes’. Overall, the production and trade patterns may be such that the South produces and exports a homogeneous good while the North, a commodity with varieties — the result driven not by technological changes, but by factor mobility. The results further suggest that the wage inequality rises in both countries in conformity with available empirical evidence.     

Higher education and public sector employment: evidence from Finnish data on twins

Using data from Finland on twins, this paper examines the effect of labour quality, as measured by education, on the choice to work in the public sector. A distinction to previous studies is made by allowing controls of family background and genetics effects that could drive the positive relationship between higher education and public sector employment. The conditional (fixed effects) logit regression estimates indicate that highly qualified employees are more likely to seek public sector employment. The paper also utilizes the longitudinal structure of the data to examine whether the results vary over time. These results indicate that the association between public sector work and higher education is counter-cyclical. In other words, highly qualified workers are more likely to hold public service positions and to have greater access to public sector jobs during economic downturns.     

Assortative marriage and the effects of government homecare subsidy programs on gender wage and participation inequality

We develop a model of the labor market where firms incur an adjustment cost when one of their workers quits, and males and females form households assortatively by skill. We show how this environment can lead to an economy where females earn less and drop out more frequently than equally skilled males in equilibrium, even when males and females constitute ex-ante identical populations. We then examine how different government homecare subsidy schemes may affect such gender inequality in the labor market. We show that the effect of government homecare subsidy schemes on gender inequality depends crucially on the form in which the subsidy is given and to whom it is allocated.     

The formal sector wage premium and firm size

We show theoretically that when larger firms pay higher wages and are more likely to be caught defaulting on labor taxes, then large-high wage firms will be in the formal and small-low wage firms will be in the informal sector. The formal sector wage premium is thus just a firm size wage differential. Using data from Ecuador we illustrate that firm size is indeed the key variable determining whether a formal sector premium exists.     

The impact of education expansion on wage inequality

The findings on education expansion and income inequality have important implications for policymakers to implement effective policies to reduce income inequality. This study attempts to explain how education expansion affects income inequality by education distribution and the rate of return to education. We decompose the effect of education expansion on wage gaps into price effect and structure effect. We compare the income inequality from 2002 to 2013 using the Chinese Household Income Project (CHIP) 2002 and CHIP2013 survey data and employ FFL decomposition method. Our findings suggest that income inequality increased in 2013 and that income inequality among the high-income groups increased even more significantly. The structure effect of education expansion on income inequality is negative, when average education increases one year, the income gap between 80th and 20th will decrease 1.2%, in other words, education expansion decreases income inequality by allowing a wide range of individuals to attend college. However, this effect is offset by the price effect, which is positive and much more significant in magnitude. One extra year of average education will increase income gap by 29% which means that the demand for high-skilled labour is increasing faster than the supply and thus lead to the increasing premium for higher education return.     

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.