EXPLAINING RISING INEQUALITY: SKILL‐BIASED TECHNICAL CHANGE AND NORTH–SOUTH TRADE*

Abstract We review the ‘skill‐biased technological change (SBTC) versus North–South trade (NST)’ debate in order to explain widening wage inequality between skilled and unskilled workers. The traditional explanations based on exogenous SBTC and on the North–South Heckscher–Ohlin–Samuelson approach, as well as the early estimates that diagnosed a clear prevalence of the former, are firstly exposed and discussed. A presentation is then made of the recent theoretical literature that endogenizes SBTC, introduces new channels of impacts from NST, and combines both explanations. Finally, the current estimates show that (i) both explanations are relevant, (ii) their impacts differ according to industries and countries, (iii) outsourcing is the main vector of impact from NST and (iv) SBTC and NST interact.     

MONOPOLISTIC COMPETITION AND PRODUCT DIVERSITY: REVIEW AND EXTENSION

Abstract The modeling of monopolistic competition has contributed to rapid developments in numerous fields of economics, notably macroeconomics, international trade, industrial organization, economic growth and economic geography. This paper provides a systematic review and some extensions of various path‐breaking models of monopolistic competition and their subsequent developments, including the works of Spence, Dixit and Stiglitz that are based on the ‘love‐of‐variety’ approach, the works of Lancaster that are based on the ‘love‐of‐characteristic’ approach, and the large‐group monopolistic competition models of Hart, among others. The paper also examines the properties of some utility functions frequently used in the literature on models of monopolistic competition. Perhaps owing to the complexity of these models, the literature lacks a broad and systematic coverage of this essential subject. The paper aims to help fill the gap.     

Workplace heterogeneity and wage inequality in Denmark

Wage inequality is on the rise in most developed economies, and this phenomenon has fostered a growing body of research on its potential drivers. Using German data over the period 1985–2009, Card et al. (The Quarterly Journal of Economics 2013, 128(3), 967-1015) argue that rising workplace heterogeneity has contributed substantially to the rise in wage inequality. I revisit their findings in two ways. First, because the generalization of their findings remains an open question, I apply their methodological approach to Danish register data and test whether rising workplace heterogeneity explains a significant share of the rise in wage inequality in Denmark. I find that, contrary to Germany, workplace heterogeneity remained practically stable over time, and this pattern contributed slightly negatively to the rise in wage inequality. Second, I complement Card et al.'s (2013) methods with the variance decomposition exercise proposed by Song et al. (2019) to identify more precisely the sources of the rise in wage inequality in Denmark. Although the rise in wage inequality is partly a between-establishment phenomenon, I show that the strengthening of assortative matching patterns and the rising heterogeneity of workers within establishments are the main drivers of growing inequality.     

DID INEQUALITY CAUSE THE U.S. FINANCIAL CRISIS?

In his widely discussed book ‘Fault Lines’ (2010), Raghuram Rajan argues that many low and middle income consumers have reduced their saving and increased debt since income inequality started to soar in the United States in the early 1980s. This has temporarily kept private consumption and employment high, but it also contributed to the creation of a credit bubble. This surge in household indebtedness turned out to be unsustainable in the financial crisis starting in 2007. Although Rajan and others emphasize the role of government in promoting credit to those households with declining relative (permanent) incomes, other strands of the literature have focused more explicitly on the implications of rising inequality for aggregate demand and households’ demand for credit. These differences in emphasis may explain why the literature on the inequality‐crisis nexus appears somewhat disparate, even though the various strands are far from mutually exclusive but rather complement each other. We therefore place the ‘Rajan hypothesis’ in the context of competing theories of consumption, and survey the empirical literature on the effects of inequality on household behaviour. We conclude that the empirical evidence calls for a renaissance of the relative income hypothesis of consumption.     

Wage inequality and the role of multinationals: evidence from UK panel data

Despite the increased attention on the impacts of globalisation, there has been little empirical investigation into the impact of multinational firms on the domestic labour market and in particular wage inequality, this is in spite of a rapid increase in foreign direct investment (FDI) at around the same time of rising inequality. Using UK panel data, this paper tests whether inward flows of FDI have contributed to increasing wage inequality. Even after controlling for the two most common explanations of wage inequality, technology and trade, we find that FDI has a significant effect upon wage inequality, with the overall impact of FDI explaining on average 11% of wage inequality.     

A spatial analysis of inward FDI and urban–rural wage inequality in China

This article investigates the spatial effect of inward foreign direct investment (FDI) on urban–rural wage inequality, both in the short and long run, by employing the Spatial Durbin Model. In particular, we carefully consider the heterogeneity of inward FDI with respect to its entry mode (ownership type) and sectoral distribution. Based on a panel dataset covering 30 provinces and cities in China from 2000 to 2016, our results show that inward FDI does not increase urban–rural wage inequality. In particular, we do not find a significant relationship between inward FDI in the secondary and tertiary sectors, while inward FDI in the primary sector has a slightly negative effect on inequality. When we consider inward FDI by entry mode, we find that wholly foreign-owned enterprises (WFE) have a negative spatial effect on urban–rural wage inequality in the short and long run, while equity joint ventures (EJV) reduce urban–rural inequality in the long run only.     

The wage policy of firms: comparative evidence for the US and Germany from personnel data

The wage policy of a German firm and a US firm is subjected to a comparative analysis, focusing on the relation between wages and hierarchies. While previous studies have examined only one particular firm, this paper investigates two plants belonging to the same owners with similar production processes but in different institutional environments. Convex wage profiles over the hierarchy levels of both plants are found. The US plant shows considerably higher intensity of intra-firm competition in terms of higher intra-level wage inequality and annual promotion rate. In contrast, wages are more distinctly attached to hierarchy levels in the German firm, as shown by wage regressions. The results are discussed in relation to previous studies.     

Openness,rural-urban inequality,and happiness in China

Although the relationship between income inequality and subjective well-being has been extensively discussed in the literature, relatively little is known about the effects of openness on subjective well-being and how rural-urban inequality may influence these effects. This article attempts to address this issue by using the dataset of the China General Social Survey (CGSS). We find that the effect of trade openness on happiness takes an inverted U shape, whereas that of financial openness is U-shaped. We also find that rural-urban inequality has a dampening effect on happiness, and this effect is strengthened by trade openness but weakened by financial openness. These findings extend previous studies on the determinants of happiness by highlighting the different effects associated with trade openness and financial openness and how these effects may interact with rural-urban inequality.     

WHAT IS THE EFFECT OF HOUSEWORK ON THE MARKET WAGE,AND CAN IT EXPLAIN THE GENDER WAGE GAP?

Abstract Does housework reduce the market wage, and if so, does it have a similar impact for males and females? In this paper, we survey and evaluate the recent and growing empirical literature on the linkages between housework and the wage rate. The review is motivated by unexplained gender wage gaps across studies, which consider personal and market‐related factors. We focus on this less‐studied aspect of wage determination. We consider the required modelling framework, and provide standardized estimated effects of housework on the hourly wage across studies. We evaluate how this literature has addressed potential estimation problems, in particular, the endogeneity of housework, concavity of the housework–wage function, threshold effects and work effort effects. We conclude that the evidence across ordinary least squares, instrumental variable, fixed effects and two‐stage least squares results casts serious doubt on the idea that the negative female housework–wage relationship is only driven by endogeneity bias or individual‐specific characteristics. Yet, much more needs to be done to address modelling and data requirements, and we point out likely and promising future research directions.     

Analysis of the practice of job evaluation in the metal industry in Turkey

Job evaluation's main aim is to establish a fair wage structure. Its main principle is ‘equal pay for equal work’. ‘Metal Industry Job Grouping System’ (MIDS) has been in the metal industry in Turkey for more than 20 years. The results of the practice of the system were measured by the Gini coefficient. By the findings, the average wages of the job groups are different enough from each other by their job groups in the way the wage of the bigger number job group is higher than the smaller except the job group two in the industry. However, the wages are far from the principle ‘equal wage for equal job’ within the same job itself. In addition, the workers make use of bonuses and social benefits. The effect of social benefits of them on the wage structure is positive within the same job group and negative between different job groups within the same company. Nevertheless, the effect of both bonuses and social benefits on the wage structure is negative between the companies because, between them they are different from each other. Job group and seniority affect the wage structure. Seniority has a socio-psychological self-producing dynamic. The distribution of seniorities within the same job group has negative effects on the wage structure. However, this fact for each worker disappears for the long term since the worker of today who has short-term seniority will be the one of tomorrow who has long-term seniority. Therefore, for each worker, the wage structure gets closer to the principle ‘equal wage for equal job’ within the same job group itself over time.     

The effect of trade and FDI on inter-industry wage differentials: The case of Mexico

Taking advantage of the liberalization process under NAFTA, this paper assesses the relative importance of the degree of trade openness and Foreign Direct Investment (FDI) in explaining inter-industry wage differentials for the case of Mexico. Using INEGI's National Survey of Urban Employment for the period 1994–2004, the empirical analysis is conducted on two stages. In the first stage, individual wages are regressed on worker characteristics, job and firm attributes, informality and a set of federal entity and industry indicators. In the second stage, inter-industry wage differentials (derived from the coefficient estimates of the industry indicators) are regressed on trade and FDI variables. The main findings show that trade openness does not have a statistically significant effect on inter-industry wage differentials, whereas for the case of FDI, a positive nonlinear relationship is found to exist.     

How Large Is International Trade’s Effect on Economic Growth?

The estimated static welfare gains from international trade are very small, on the order of one percent of GDP. The case for free trade is therefore increasingly linked to trade’s apparent positive effects on economic growth. But how large are these growth effects? The vast empirical literature has emphasized the statistical significance, not the economic significance, of the trade‐growth relationship. This survey’s re‐examination of the empirical literature focuses on the size of the relationship between trade and growth. Our survey reveals that the many empirical studies are surprisingly consistent in terms of the size of the relationship: A one percentage point increase in the growth of exports is associated with a one‐fifth percentage point increase in economic growth. Given the power of compounding, the effect of trade on growth is very important for human welfare.     

The de-collectivisation of pay setting in Britain 1990–98: incidence,determinants and impact

What were the causes and consequences of declining collective bargaining coverage in Britain? The demise of collective bargaining did not lead to a greater use of individualised payment mechanisms, ‘high-involvement’ practices or productivity gains. Wage inequality rose as a result of the decline. However, workplaces that abandoned bargaining created more jobs. Overall, these results raise questions about Britain’s labour market performance during the 1990s because they suggest that falling unemployment as a result of weaker trade unions came at the price of slower productivity growth and widening male wage inequality.     

SKILL FORMATION, CAPITAL ADJUSTMENT COST AND WAGE INEQUALITY

The paper employs a three-sector general equilibrium model for examining the consequences of an infrastructure development scheme to the education sector and an inflow of foreign capital on the skilled-unskilled wage inequality in a developing economy. The education sector faces a capital adjustment cost for which the effective unit cost of capital depends positively on the amount of capital employed. Although both infrastructure development schemes and inflows of foreign capital lead to higher skill formation, the policies produce incongruent effects on the wages of skilled and unskilled labor. Furthermore, the effects of the policies on the skilled-unskilled wage inequality depend crucially on the relative factor intensities of the low-skill and high-skill sectors. Finally, which of the two policies a country should adopt will depend on technological, institutional and trade related factors.     

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.     

Dynamics of Trade Integration and Technological Convergence

The issue of the impact of trade on economic performance and labour markets has been intensively discussed in recent literature on trade liberalization and globalization, where the debate was mainly about identifying the relative impact of trade and technology. The bulk of the existing literature in this area employs, almost without exception, a static Heckscher-Ohlin framework that seems not to be a suitable tool for analysing the ongoing dynamics. This paper presents a dynamic multi-sectoral framework with heterogenous labour to explore the issue of trade liberalization and sectoral catching-up in productivity levels. The model is basically an input-output framework with Schumpeterian features; the latter are modelled as the impact of transitory rents that result from uneven productivity growth and technological catching-up upon the price and quantity systems of the trading economies. Relative productivity and wage rate dynamics across sectors determine the comparative costs and the dynamics of trade specialization. In the Appendix, the equilibrium solutions of the model are derived.     

NOMINAL AND REAL WAGE RIGIDITIES IN NEW KEYNESIAN MODELS: A CRITICAL SURVEY

Abstract The labour market is receiving increasing attention in the New Keynesian literature. In this paper, I critically survey this literature in order to highlight the role played by wage rigidities in the explanation of fluctuations caused by technology shocks. To this aim, I present a dynamic stochastic general equilibrium model with sticky prices, nominal wage rigidities and hiring costs. The comparison between this model and that of Blanchard and Gali highlights the non‐trivial differences which exist in the way nominal wage and real wage rigidities drive the economy's dynamics. My conclusion is that models incorporating nominal wage rigidities and some degree of price stickiness provide a better account of macroeconomic dynamics than models with real wage rigidities.     

Trade Openness and Spatial Inequality in Emerging Countries

Abstract

Emerging world countries have experienced over the last two decades a significant change in their trade patterns. Bold trade reforms have been followed by rapid rises in international trade levels. However, despite these radical changes, we know remarkably little about how changes in trade patterns are affecting the evolution of regional inequality in the developing world. This paper addresses the link between trade openness and spatial inequality across 22 emerging countries over the period between 1990 and 2006. Our findings show that changes in international trade bring about a significant rise in within-country inequality across the developing world and that this impact is greatest in the poorest countries. This result is robust to the inclusion of a number of control variables, and to changes in the specification of the sample and in the measure used to quantify the level of regional disparities. Consequently, the increase in trade exposure across the emerging world, while possibly benefiting the countries involved in the process in aggregate terms, is generating winning and losing regions.     

How to close the gender pay gap in Europe: towards the gender mainstreaming of pay policy

The European Employment Strategy includes a new commitment to a substantial reduction in the gender pay gap in European Union (EU) member states, but progress requires a radical shift away from the traditional policy emphasis on the supply‐side deficiencies of women compared with men. Mainstream theory argues that gender inequality is reduced once the pay gap is ‘adjusted’ for differences in individual characteristics (education, experience, etc.). But new empirical studies in many EU member states demonstrate that the work environment—the general wage structure, job and workplace characteristics—shapes gender pay inequality. Given the negative gender impact of trend declines in minimum wages, moves towards more decentralisation of wage‐setting and public sector restructuring, the article argues for a holistic, gender mainstreaming approach to pay policy.     

Spatial changes in labour market inequality

We study spatial changes in labour market inequality for US states and MSAs using Census and American Community Survey data between 1980 and 2010. We report evidence of significant spatial variations in education employment shares and in the college wage premium for US states and MSAs, and show that the pattern of shifts through time has resulted in increased spatial inequality. Because relative supply of college versus high school educated workers has risen faster at the spatial level in places with higher initial supply levels, we also report a strong persistence and increased inequality of spatial relative demand. Bigger relative demand increases are observed in more technologically advanced states that have experienced faster increases in R&D and computer usage, and in states where union decline has been fastest. Finally, we show the increased concentration of more educated workers into particular spatial locations and rising spatial wage inequality are important features of labour market polarization, as they have resulted in faster employment growth in high skill occupations, but also in a higher demand for low wage workers in low skill occupations. Overall, our spatial analysis complements research findings from labour economics on wage inequality trends and from urban economics on agglomeration effects connected to education and technology.