Union density is associated with faster wage growth
Union density is associated with faster wage growth without a clear productivity penalty.
Union density is one of the clearest institutional predictors of faster wage growth and reduced wage inequality.
This claim analysis is fresh and accurate as of 2026-07-07
Premise Assessment
Is the claim as stated true? Four dimensions, each 0–25, sum to 100. The verdict label is derived from this score. Full rubric →
Quality and quantity of direct evidence for or against the claim — RCTs, systematic reviews, natural experiments, large cohort studies.
Farber, Herbst, Kuziemko & Naidu's century-long dataset documenting a stable 10-20 log-point union premium provides strong, historically deep empirical support.
Whether the proposed mechanism is valid and established — does the how make sense, or are there fundamental flaws in the causal logic?
The wage-premium and threat-effect mechanisms are well-established, and Doucouliagos & Laroche's meta-analysis showing null-to-positive productivity effects confirms unions redistribute rather than destroy economic value.
Degree of agreement among domain experts and relevant scientific or policy bodies — depth and quality of consensus, not just majority opinion.
Labor economists broadly accept the wage premium finding while debating precise productivity effects across countries.
Whether findings hold across independent studies, populations, and contexts — resistance to p-hacking and publication bias.
The premium finding replicates across Card's longitudinal analysis and Farber et al.'s Gallup-based century-spanning dataset.
Individual vs. Structural
How much of the outcome is explained by structural forces versus individual agency? Four dimensions, each 0–25. Higher scores indicate stronger structural causation. Full rubric →
Score component breakdown not yet available for this entry.