Labor Economics

The stock of knowledge, skills, abilities, and experience that workers acquire through education, training, and on-the-job experience. Human capital theory, developed by Gary Becker and Jacob Mincer, treats these investments as analogous to physical capital investments, with returns in the form of higher wages and productivity.

Wage premiums or discounts that arise to compensate workers for non-monetary differences across jobs, such as risk, unpleasant working conditions, or irregular hours. The theory, originating with Adam Smith, predicts that riskier or less desirable jobs must pay more to attract workers.

The decision framework in which individuals allocate their finite time between market work (earning income) and leisure (all non-market activities). The labor supply curve can bend backward at high wage levels when the income effect of a wage increase dominates the substitution effect.

The theory that, in competitive labor markets, profit-maximizing firms hire workers up to the point where the marginal revenue product of labor equals the wage rate. This determines labor demand and provides a benchmark for understanding wage determination.

Economists distinguish among frictional unemployment (short-term, between jobs), structural unemployment (mismatch between worker skills and job requirements), cyclical unemployment (due to economic downturns), and seasonal unemployment. The natural rate of unemployment includes frictional and structural but not cyclical unemployment.

A labor market structure in which a single employer (or a small number of employers) has significant wage-setting power because workers have few alternative employment options. In monopsony, wages are set below the competitive level and employment is lower than the socially optimal amount.

A labor union is an organization of workers that bargains collectively with employers over wages, benefits, and working conditions. Unions can raise wages above competitive levels (the union wage premium), but they may also improve productivity through voice mechanisms and reduce turnover.

Occurs when workers with identical productivity receive different wages based on characteristics unrelated to their job performance, such as race, gender, or ethnicity. Gary Becker's taste-based discrimination model and Edmund Phelps's and Kenneth Arrow's statistical discrimination model offer competing explanations.

Michael Spence's theory that education may serve primarily as a signal of innate ability rather than as a direct enhancer of productivity. In this view, employers use educational credentials to screen workers because obtaining a degree is less costly for high-ability individuals.

A framework for understanding labor market frictions, developed by Peter Diamond, Dale Mortensen, and Christopher Pissarides (Nobel Prize 2010). It models how workers searching for jobs and firms searching for workers are brought together through a matching function, and explains why unemployment and vacancies can coexist.