Economic Theories of Low-Wage Work

This article examines economic theories of the low-wage labor market to increase understanding of economic inequality and poverty in the United States, particularly related to the labor market. On the one hand, neoclassical, labor monopsony, and Harris-Todaro models explain how minimum wage policies are related to supply and demand of labor, human capital, employment, and unemployment. On the other hand, the efficiency wage model, the dual labor market theory, and technology development and globalization account for the causes of the wage differentials. This article includes a conceptual map that illustrates the interrelationships between these economic theories of low-wage work.     

SKILLED‐UNSKILLED WAGE INEQUALITY AND URBAN UNEMPLOYMENT

The impact of trade liberalization on the labor market in the North has drawn tremendous attention in the face of the growing skilled‐unskilled wage gap but in the South it has been somewhat neglected. One of the key structural differences between the North and the South is that the South experiences a pronounced rural‐urban migration in the presence of urban unemployment. We introduce this feature in the structure of a simple general equilibrium model to analyze the effects of trade liberalization and fragmentation on employment and the skilled‐unskilled wage differential in the South. In particular, we show that while fragmentation necessarily improves the unskilled wage and the skilled wage, more lucrative global opportunities for the skilled final product, in the absence of fragmentation, can reduce the rural wage and increase urban unemployment. The effect of fragmentation, ceteris paribus, on the skilled‐unskilled wage gap is sensitive to the degree of substitutability between land and unskilled labor. As such, fragmentation can magnify the increase in the skilled‐unskilled wage gap resulting from an improvement in the terms of trade. It is also shown that a technological progress in the intermediate goods sector increases the skilled‐unskilled wage gap and raises urban unemployment. (JEL F1, O1, F11, F12)     

LABOR MARKET SEARCH: AN EXPERIMENTAL STUDY

The theoretical results derived from models of economic search have implications which relate to the structure and performance of labor markets. Utilizing a series of laboratory experiments, we attempt to capture many of the features of workers' search and also the conditions under which labor markets operate. By varying certain of the experimental conditions, we are able to determine the searchers' responses to changes in the terms of unemployment insurance, to the existence of a minimum wage, and to different states of information about the underlying distribution of wages. In most cases the behavior of the searchers is consistent with that predicted by theory.     

Interfirm wage differentials in a local labor market: The case of the fast-food industry

We examine interfirm wage differentials among fast-food restaurants in Atlanta, Georgia to determine the degree to which these differentials correspond to the predictions of competitive theory. While no definitive test is possible, given our inability to control all sources of wage variation, the evidence nevertheless suggests that the wage structure is largely shaped by competitive forces, albeit in a relatively complex manner due to differences in a host of factors that the simple version of the theory holds constant. Evidence is also found, on the other hand, that the supply curve of labor to the individual firm slopes upward for experienced workers and that a small noncompensating wage differential may exist that is related to variation in each restaurant's ability to pay.     

How do Students Respond to Labor Market and Education Incentives? An Analysis of Homework Time

This study examines the extent to which high school students respond to education and labor market incentives when making decisions about homework. Student and state fixed effects estimators are used to control for unobserved individual and geographic heterogeneity and selection. I find that students’ choices about homework respond to unemployment rates and changes in the minimum wage, but not to changes in the price of higher education. These responses are not constant throughout the population: female students, low income students, and low achieving students in particular increase their homework time in response to a higher minimum wage, while male students are more responsive to changes in the unemployment rate.     

LABOR MARKET DYNAMICS WITH SEARCH FRICTIONS AND FAIR WAGE CONSIDERATIONS

Fairness considerations in wage setting can improve the ability of the Diamond‐Mortensen‐Pissarides search and matching model to account for U.S. labor market dynamics. Firms' production is influenced by workers' effort input, which depends on whether workers consider the employment relation as fair. A typical worker's effort is determined in a comparison of individual current wage with wage norms, including the outside option, the individual past wage, and the wage level in the steady state. The fairness considerations in the search framework give rise to endogenous real wage rigidity, and realistic volatilities of unemployment, vacancies, and labor market tightness. (JEL E24, E32, J64)     

Adam Smith’s Economics and the Modern Minimum Wage Debate:The Large Distance Separating Kirkcaldy from Chicago

In the post-World War II period the spearhead of opposition to minimum wage (MW) legislation has been economists associated with the Chicago School, such as Friedman, Stigler, and Becker. They have captured the high ground in the debate partly by claiming their anti-MW position is grounded in the free market/invisible hand theory espoused by the founder of economics, Adam Smith. This paper shows the Chicago position rests on a skewed, one-sided, and partisan reading of Smith’s Wealth of Nations. A more inclusive, balanced, and neutral review reveals that while Smith definitely favored free trade and opposed protection as general principles, his non-competitive model of labor markets, dynamic theory of production, and humanistic social welfare criteria suggest that on both positive and normative grounds he might well have favored a minimum wage set at the poverty level. (Smith never took a position on a MW mandate). Besides balancing and correcting the historical record, the paper broadens MW analysis by reintroducing several behavioral and institutional dimensions emphasized by Smith but typically neglected in the current mainline debate which narrowly focuses on competitive versus monopsony models. A Smithian analysis also has several implications for findings from empirical MW studies.     

Minimum Wages in a Segmented Labor Market: Evidence from South Africa

The segmented labor market model describes the impacts of minimum wages on covered and uncovered sectors. This paper examines the impacts of an industry-specific minimum wage in South Africa, a state characterized by high unemployment, a robust union movement, and the presence of a large informal sector. Under the industry-specific wage law, formal agricultural and household workers are covered, while workers in other sectors are not. The unique aspect of this paper lies in the ability to compare the impacts of minimum wage legislation on formal covered, informal covered, formal uncovered, and informal uncovered workers. This natural experiment allows us to test whether industry-specific minimum wage legislation leads to higher wages, whether wage increases are restricted solely to covered formal sectors or if there are spillover effects, and whether such legislation manifests in disemployment effects. We find evidence of higher wages yet disemployment among black workers in formal markets. In informal markets we find no employment effects, but higher wages in formal markets appear to have spilled over into informal markets in covered sectors.     

Do davis-bacon minimum wages raise product quality?

The Davis-Bacon Act requires labor on most federally financed construction projects to be paid a minimum wage, often equal to the union wage. Since contractors are apt to employ higher quality labor at this higher wage, Davis-Bacon supporters argue that higher quality output will result. Contrary to this reasoning, our paper shows that a Davis-Bacon type rule need not improve output quality. The switch to higher quality labor, combined with a competitive bidding process, produces an important possibility of perverse output quality results from Davis-Bacon.     

Before Crisis: Gender and Economic Outcomes of the Two Largest Immigrant Communities in Spain1

In this study, we compare labor force outcomes of the two largest immigrant communities in Spain (Moroccans and Romanians) before the economic crisis hit. We are interested in understanding if and how gender influences the labor force outcomes (wage per hour, labor force participation, and unemployment rate) of these two immigrant groups. Our analyses show that, overall, gender is an important variable on Spanish labor market, but it affects differently the two groups. There is a male job market and a female job market for both Romanian and Moroccan immigrants, with men earning significantly higher wages than women. However, while for Moroccans, working women differ significantly from men in terms of demographic characteristics, Romanian women and men have similar demographic characteristics and comparable levels of labor force participation, but differ in terms of wage levels.     

SELF‐EMPLOYMENT,EFFICIENCY WAGE,AND PUBLIC POLICIES

Empirical evidence suggests that unemployed workers are much more likely to become self‐employed than wage‐employed workers. Also, higher unemployment benefits significantly reduce the rate of self‐employment. This article develops a model of self‐employment which incorporates transitions between unemployment and self‐employment. It integrates two strands of theoretical literature—models of occupational choice and the efficiency wage models. In this model, a higher unemployment benefit reduces the self‐employment rate and the transition rate of unemployed workers to self‐employment, which is consistent with empirical evidence. (JEL J23, J58, J64)     

EMPLOYMENT DYNAMICS OF IMMIGRANTS VERSUS NATIVES: EVIDENCE FROM THE BOOM‐BUST PERIOD IN SPAIN, 2000–2011

This article studies whether the durations in unemployment and employment for immigrants and natives respond differently to changes in economic conditions and to the receipt of unemployment benefits. Using Spanish administrative data for the period 2000–2011, we estimate multi‐spell duration models that disentangle unobserved heterogeneity from true duration dependence. Our findings suggest that immigrants are more sensitive to changes in economic conditions both in terms of unemployment and employment hazards. The effect of the business cycle is not constant but decreases with duration at a higher rate among immigrants. We provide evidence that the higher job separation rates and lower capital‐labor complementarity of immigrants are mechanisms that are possibly compatible with these results. We also find evidence of a disincentive effect of unemployment benefits on unemployment duration, which is stronger for immigrants, but only at the beginning of the unemployment spell, especially under good economic conditions. Finally, unemployment benefits increase job match quality only for native workers with temporary contracts. (JEL J64, J61, C23, C41, J65)     

LOBBYING FOR MINIMUM WAGES

Using a common agency lobbying framework, this paper illustrates how the minimum wage set reflects the interaction between economic and political factors and under what circumstances will the policymaker be induced, through lobbying, to change the minimum wage. Specifically, when the labor demand elasticity is large, lobbying is successful in inducing the policymaker to set the minimum wage in accordance with her political ideology. However, the paper also shows the conditions under which lobbying will reverse the ideological preference and induce a business‐friendly government to increase the minimum wage. Empirical analysis on a panel data for ten Canadian provinces gives considerable support for theoretical predictions. The real minimum wage decreases in skill‐adjusted union density and political ideology, while larger labor demand elasticity reinforces the influence of political ideology in the presence of lobbying. (JEL J38, D72, D78)     

The minimum wage and productivity differentials

A firm’s ability to adjust its production process to economize on low-skilled labor when faced with a minimum wage increase will differ greatly depending on industry or occupation. For example, more capital-intensive means of cleaning hotel rooms or serving customers at restaurants may not be readily available without degrading service quality. In such situations, the productivity of labor is essentially capped, and firms have few options when the minimum wage increases. This simple observation has implications for studies that rely on microdata to examine the effects of minimum wage increases. If firms only increase prices in response to a minimum wage increase, employment effects are likely small. If the goal of the minimum wage is to redistribute income from firms and consumers to workers, minimum-wage increases targeted at industries and occupations where such rigidities result in an inelastic demand for labor may achieve the desired goal at a lower cost than across-the-board increases. However, such a scheme causes an inefficient allocation of labor and would be subjected to substantial political pressures that may lead to anomalous results. Additionally, it is unreasonable to conclude that policy makers have the necessary information to skillfully set the minimum wage. I thank Brian E. Chezum and Jeff Waddoups for helpful comments. All mistakes, of course, are my own.     

UNION POWER,COLLECTIVE BARGAINING,AND OPTIMAL MONETARY POLICY

We study Ramsey policies and optimal monetary policy rules in a dynamic New Keynesian model with unionized labor markets. Collective wage bargaining and unions' monopoly power amplify inefficient employment fluctuations. The optimal monetary policy must trade off between stabilizing inflation and reducing inefficient unemployment fluctuations induced by unions' monopoly power. In this context the monetary authority uses inflation as a tax on union rents and as a mean for indirect redistribution. Results are robust to the introduction of imperfect insurance on income shocks. The optimal monetary policy rule targets unemployment alongside inflation. (JEL E0, E4, E5, E6)     

INFORMAL LABOR MARKETS AND ON‐THE‐JOB TRAINING: EVIDENCE FROM WAGE DATA

This study examines whether informal sector jobs are a source of training for young less‐educated workers. Controlling for worker and job characteristics, it is found that, in the early years of workers' careers in Mexico, wage growth in the informal sector is higher than in the formal sector. This result is consistent with general human capital investment on‐the‐job if the informal labor market is more competitive than the formal labor market due to frictions generated by labor regulations. (JEL O17, J24, J310)     

Do minimum wage hikes reduce employment? State-level evidence from the low-wage retail sector

Several recent studies have challenged the conventional notion that raising the minimum wage reduces employment. This study considers this issue by examining the minimum wage's influence on retail employment. Standard labor market analysis suggests that low-wage industries should be particularly sensitive to minimum wage hikes. Therefore, by considering retail employment using pooled-cross sectional, state-level data, this study extends recent research that generally emphasized teen employment. The empirical analysis considers state data from the latter 1980's, a unique period where many states raised their minimum wage above the federal level. Our results suggest that an increased minimum wage reduces retail employment, which is consistent with the standard labor market model. Moreover, further analysis indicates that minimum wage hikes also had relatively large adverse effects on total state employment growth, which implies that state minimum-wage policies can affect firm and household location. We thank Dan Rickman and the anonymous referee for their help with this study.     

INFLATION DYNAMICS AND LABOR MARKET SPECIFICATIONS: A BAYESIAN DYNAMIC STOCHASTIC GENERAL EQUILIBRIUM APPROACH FOR JAPAN'S ECONOMY

Which labor market specification is better able to describe inflation dynamics, a widely used sticky wage model or a recently investigated labor market search model? Using a Bayesian likelihood approach, we estimate these two models with Japan's data. This article shows that the labor market search model is superior to the sticky wage model in terms of both marginal likelihood and out‐of‐sample forecast performance, particularly regarding inflation. The labor market search model is better able to replicate the cross‐correlation among inflation, real wages, and output in the data. Moreover, in this model, real marginal cost is determined by both hiring cost and unit labor cost that varies with employment fluctuations, which gives rise to a high contemporaneous correlation between inflation and real marginal cost as represented in the New Keynesian Phillips curve. (JEL E24, E32, E37)     

A COMPETITIVE MODEL OF WORKER REPLACEMENT AND WAGE RIGIDITY

We adapt the models of Menzio and Moen (2010) and Snell and Thomas (2010) to consider a labor market in which firms can commit to wage contracts but cannot commit not to replace incumbent workers. Workers are risk averse, so that there exists an incentive for firms to smooth wages. Real wages respond in a highly nonlinear manner to shocks, exhibiting downward rigidity, and magnifying the response of unemployment to negative shocks. We also consider layoffs and show that for a range of shocks labor hoarding occurs while wages are cut. We argue these features are consistent with recent evidence. (JEL E32, J41)     

MINIMUM WAGES,IMPORT STATUS,AND FIRMS' INNOVATION: THEORY AND EVIDENCE FROM CHINA

This study explores the heterogeneous effects of minimum wage on innovation of different types of firms. We develop an open‐economy R&D‐based growth model and obtain the following result: raising the minimum wage reduces innovation of firms that use domestic inputs but increases innovation of firms that import foreign inputs. We test this result using city‐level data on minimum wages and firm‐level patent data in China. In accordance with our theory, we find that raising the minimum wage is associated with more innovation by importing firms and less by non‐importing firms. This result survives a battery of robustness checks. (JEL E24, F43, O31)