Modern Labor Economics: Theory and Public Policy

Citation

Ehrenberg, R. G., Smith, R. S., & Hallock, K. F. (2025). Modern Labor Economics: Theory and Public Policy (15th ed.). Routledge.

Chapter Summary

The fifteenth edition (Routledge, copyright 2025) runs to about 760 pages. Its sixteen chapters occupy some 650 pages and are followed by answers to the odd-numbered review questions and problems. Routledge describes it as a text for one-semester labor economics courses at the undergraduate and graduate levels, giving an overview of the modern theory of labor market behavior and showing how that theory is used to analyze public policy, for students who may not have an extensive background in economics. The book is organized like a standard microeconomics of the labor market: demand, then supply, then the wage structure that results, then institutions and aggregate outcomes. This edition updates data and examples throughout, expands coverage of monopsonistic labor markets (including antitrust regulation and rulings), the economics of education, the gender pay gap, recent developments in unions and unemployment, and adds material on working from home and on artificial intelligence.

Chapters 1–2: Introduction; Overview of the Labor Market

The opening chapters set out the economic approach to labor markets, which the publisher describes as including an introduction to basic methodological techniques and problems, and then give an overview of the labor market as a whole.

Chapters 3–4: The Demand for Labor; Labor Demand Elasticities

Two chapters on the employer's side: how firms decide how much labor to hire, and how responsive that demand is to wages and other influences.

Chapter 5: Frictions in the Labor Market

A chapter on the frictions that keep real labor markets from working like a frictionless competitive market, placed directly after the two labor demand chapters and before the turn to labor supply.

Chapters 6–7: Supply of Labor to the Economy: The Decision to Work; Labor Supply: Household Production, the Family, and the Life Cycle

The worker's side: the individual decision whether and how much to work, and then labor supply in the context of household production, family decisions and the stages of the life cycle. Chapter 6 is one of the longer chapters in the book.

Chapter 8: Compensating Wage Differentials and Labor Markets

How differences in job characteristics, such as risk or unpleasant conditions, are reflected in wages, and what this implies for labor markets and policy.

Chapters 9–10: Investments in Human Capital: Education and Training; Worker Mobility: Migration, Immigration, and Turnover

Chapter 9, among the longest, treats education and training as investments; the economics of education is one of the areas the publisher says has been expanded. Chapter 10 applies a similar investment framework to mobility: migration within a country, immigration, and job turnover.

Chapter 11: Pay and Productivity: Wage Determination Within the Firm

The internal labor market: how firms structure pay to influence productivity.

Chapters 12–13: Gender, Race, and Ethnicity in the Labor Market; Unions and the Labor Market

Two of the longest chapters. Chapter 12 examines differences in labor market outcomes by gender, race and ethnicity, including the gender pay gap that receives greater coverage in this edition. Chapter 13 covers unions and collective bargaining and their effects, updated for recent developments.

Chapters 14–16: Unemployment; Inequality in Earnings; The Labor Market Effects of International Trade and Production Sharing

The final chapters move to aggregate outcomes: unemployment, the distribution of earnings, and the effects of international trade and the international division of production on workers.

Key Concepts

Chapters 1–5: The labor market and labor demand

• Labor market: the market in which workers supply and employers demand labor services, the book's unit of analysis.
• Demand for labor: the amount of labor employers wish to hire at each wage.
• Labor demand elasticity: the responsiveness of employment to changes in wages or other costs.
• Labor market frictions and monopsony: departures from perfect competition that give employers some power over wages.

Chapters 6–8: Labor supply and compensating differentials

• Decision to work: the individual choice of whether and how much to work.
• Household production and the life cycle: labor supply decisions made within families and over a lifetime.
• Compensating wage differentials: wage differences that offset differences in the characteristics of jobs.

Chapters 9–11: Human capital, mobility and pay

• Human capital: education and training viewed as investments that raise future earnings.
• Worker mobility: migration, immigration and turnover as responses to differences in opportunities.
• Pay and productivity: the design of pay within firms to influence effort and output.

Chapters 12–16: Differences, institutions and aggregate outcomes

• Labor market differences by gender, race and ethnicity: including the gender pay gap and discrimination.
• Unions: collective organizations of workers and their effects on wages and employment.
• Unemployment: the condition of workers who seek but do not have jobs, and its types and causes.
• Earnings inequality: the dispersion of earnings and the forces that change it.
• Trade and production sharing: international trade and the international division of production as influences on labor markets.

Critical Analysis

Strengths

• Theory tied to policy. The subtitle states the book's purpose, and the publisher stresses that each concept is paired with examples of policy decisions that have affected, and been affected by, the labor market. The authors' stated view is that seeing the social implications of the theory motivates students to learn it.
• Accessible to non-specialists. The book is explicitly designed for students who may not have an extensive background in economics, so it can serve students from industrial relations, public policy or management as well as economics majors.
• Complete coverage of the field. Sixteen chapters run from labor demand and supply through compensating differentials, human capital, mobility, pay within firms, discrimination, unions, unemployment, inequality and trade.
• Current and maintained. Now in its fifteenth edition, the book has been updated with new data and examples, more on monopsony and antitrust, education, the gender pay gap, unions and unemployment, and new material on working from home and AI. Answers to odd-numbered questions and problems support self-study.

Limitations

• Length. At about 760 pages, the book holds more than a single semester can cover in full, despite being aimed at one-semester courses; instructors must choose chapters.
• Not a formal graduate text. Its accessibility to students without an extensive background in economics means it does not develop the mathematical models and econometric methods that a research-oriented graduate course requires.

Where It Fits in the Course

This is the course's main undergraduate text for labor economics. Cahuc, Carcillo and Zylberberg's Labor Economics is a comprehensive graduate textbook that sets formal models beside econometric evidence on the same topics (labor supply and demand, wage setting, human capital, search and matching unemployment, policy evaluation); it is the natural next step for students who want the formal versions of Chapters 3–9 and 14. Piketty's The Economics of Inequality is a short primer on measuring and analyzing inequality and on redistribution, a good companion to Chapter 15.

On the public-economics side of the course, Gruber's Public Finance and Public Policy covers taxation, social insurance and public programs, which complement this book's policy applications; Stephen Smith's Taxation: A Very Short Introduction is a brief introduction to the tax side. Levine and Rubinstein's Smart and Illicit is a research study of who becomes an entrepreneur and whether they earn more, an example of empirical labor research using US survey data that could follow the chapters on human capital and earnings.

How to Use This Book

A principles-level course in microeconomics is enough preparation; the book is written for students without extensive economics backgrounds.

• Core: Chapters 1–4 and 6–7, which develop the demand and supply framework that the later chapters build on; Chapter 5 on frictions belongs with them.
• Wage structure: Chapters 8–11 (compensating differentials, human capital, mobility, pay within the firm). Chapter 9 is long; read it in two sittings.
• Topics by course emphasis: Chapter 12 for discrimination and pay gaps, 13 for unions, 14 for unemployment, 15 for inequality, 16 for trade. A policy-oriented course might take 12, 14 and 15; an industrial relations course 11 and 13.
• Practice: work the end-of-chapter review questions and problems, checking odd-numbered answers at the back of the book.

For each policy example, identify which model from the core chapters is being applied and which assumption drives the conclusion. Following labor market statistics in the news (employment, wages, unemployment) while reading Chapters 2 and 14 makes the concepts concrete.