Does Occupational Licensing in the United States Improve Quality or Simply Raise Costs?

Johnson (2026) examines whether occupational licensing in the United States improves service quality or mainly raises costs and wages for licensed workers. She draws on national labor force data, prior empirical studies, and policy evidence across occupations and states. The evidence shows that licensing is associated with higher wages—often around 15 percent—and in some cases about 4 percent higher over time, while its effects on employment are mixed. Most studies find little to no measurable improvement in service quality. She concludes that licensing often restricts labor supply and increases prices without clear consumer benefits, though effects vary across occupations.

Why This Article Was Selected for The Policy Scientist

Occupational licensing is a central policy issue because it governs entry into a large and growing share of the labor market, affecting prices, access to services, worker mobility, and income distribution. Johnson (2026), building on a substantial body of prior work in this area, synthesizes evidence on these trade-offs at a moment when bipartisan reform interest is unusually high. The article is timely given rising concern about labor shortages and barriers to mobility. It contributes by integrating theory, institutional detail, and empirical findings. The data foundation is broad but indirect, relying on existing studies with heterogeneous measures. Findings are plausibly generalizable across U.S. states, though less so internationally. The empirical base relies largely on observational methods; stronger causal designs would improve inference.

Full Citation and Link to Article

Johnson, J. E. (2026). Occupational licensing in the United States. Journal of Economic Perspectives, 40(1), 167–190. https://doi.org/10.1257/jep.20251458 

Central Research Question

The article examines how occupational licensing in the United States functions as a regulatory institution and whether it improves social welfare by enhancing service quality or instead primarily operates as a mechanism that restricts labor supply and raises wages and prices. Johnson (2026) frames the central inquiry around the fundamental trade-off embedded in licensing policy: whether the consumer protection benefits associated with minimum quality standards outweigh the economic costs imposed through barriers to entry. The analysis also seeks to explain why licensing has expanded so substantially over time and why reform efforts, despite bipartisan support, have proven difficult to implement.

Previous Literature

The article builds on a long-standing literature in labor economics and public policy that traces back to early discussions of occupational restrictions in classical economics and develops more fully in modern empirical work led by scholars such as Morris Kleiner. Prior research has consistently emphasized that licensing can correct asymmetric information problems by ensuring minimum quality standards, particularly in occupations where consumers cannot easily assess provider competence. At the same time, the literature has documented that licensing reduces labor supply and raises wages for incumbent workers. More recent empirical studies have refined these insights using quasi-experimental variation across states and over time, generally finding wage premiums for licensed workers but limited evidence of corresponding improvements in service quality. Johnson extends this literature not by introducing a new empirical design, but by synthesizing theoretical and empirical contributions, highlighting areas of consensus, and identifying gaps—particularly the limited ability of existing studies to measure quality effects and the heterogeneity of licensing regimes across occupations.

Data

The article relies on a combination of national survey data, administrative records, and previously published empirical studies. Descriptive statistics are drawn from sources such as the Current Population Survey, which provides estimates of the share of workers holding licenses or certifications and allows for analysis of the distribution of licensed occupations across sectors. These data indicate that roughly one-quarter of the U.S. workforce holds a professional license or certification, with most credentials issued at the state level. The article also incorporates evidence from a wide range of empirical studies that use diverse data sources, including occupation-level wage data, state-level policy variation, and novel proxies for service quality such as consumer reviews, health outcomes, and professional performance metrics. However, Johnson emphasizes that data limitations are substantial, particularly with respect to measuring quality, tracking historical changes in licensing requirements, and constructing consistent cross-state comparisons of regulatory stringency.

Methods

The article is primarily a synthesis rather than an original empirical analysis, but it reviews and evaluates the methodological approaches used in the literature. Much of the empirical evidence on licensing relies on observational designs that exploit variation in licensing policies across states or over time. These include difference-in-differences approaches, cross-state comparisons, and event-study frameworks that estimate the impact of adopting licensing requirements on wages and employment. Some studies also leverage variation in the intensity of licensing within occupations to estimate causal effects. Despite these advances, the article notes that most research does not employ randomized controlled trials and that causal inference remains constrained by data limitations and the complexity of licensing regimes. Measurement challenges are particularly acute for quality outcomes, which are often proxied indirectly. As a result, while the literature provides reasonably credible estimates of labor market effects, conclusions about quality and welfare effects are less definitive. The article suggests that future research would benefit from stronger causal identification strategies and improved administrative data that link licensing status to outcomes.

Findings/Size Effects

The article reports a strong and consistent finding that occupational licensing raises wages for affected workers. Estimates from the literature suggest wage premiums on the order of approximately 15 percent when an occupation is fully licensed, with some studies finding smaller long-term effects of around 4 percent following the introduction of licensing policies. These effects are consistent with theoretical predictions that licensing restricts entry and reduces labor supply. Evidence on employment effects is more mixed. Some studies find that licensing reduces employment by deterring entry, while others find neutral or even positive effects when quality improvements increase consumer demand. The variability in employment outcomes reflects differences in how licensing affects perceived or actual service quality across occupations.

In contrast, the evidence on quality is notably weak. Across a range of studies using different measures—including consumer ratings, professional performance indicators, and health outcomes—most find little to no measurable improvement in service quality associated with licensing. This absence of strong quality effects is central to ongoing policy debates, as it suggests that licensing may impose costs without delivering commensurate benefits. However, the article cautions that these findings are concentrated in occupations with partial or recent licensing variation and may not generalize to occupations with long-standing and universal licensing, such as medicine or law.

The article also highlights several secondary effects. Licensing appears to reduce labor market mobility by making it more difficult for workers to move across states or switch occupations. These effects are measurable but relatively small in aggregate. There is also some evidence that licensing can reduce wage gaps across demographic groups in certain contexts, although it may simultaneously increase inequality by depressing wages in comparable unlicensed occupations.

Conclusion

Johnson concludes that occupational licensing represents a policy domain characterized by clear theoretical trade-offs but incomplete empirical resolution. The evidence strongly supports the conclusion that licensing raises wages and, by implication, prices, while providing limited and inconsistent evidence of quality improvements. This imbalance suggests that at least some licensing regimes may be more restrictive than necessary to achieve consumer protection goals. At the same time, the heterogeneity of licensing across occupations and the difficulty of measuring quality limit the ability to draw universal conclusions.

The article emphasizes that reform efforts should be guided by careful consideration of social welfare effects, with particular attention to policies that expand access without compromising quality, such as scope-of-practice reforms. It also underscores the political economy constraints that make reform difficult, given the concentrated benefits to incumbent workers and the diffuse costs to consumers. Finally, the article calls for improved data and stronger empirical methods to better identify the conditions under which licensing enhances or reduces welfare, highlighting the need for more rigorous causal evidence to inform future policy decisions.