Quarterly Journal of Economics Vol. 127 No. 1 2012
Long-Run Impacts of Unions on Firms: New Evidence from Financial Markets, 1961–1999 *
Abstract
We estimate the effect of new private-sector unionization on publicly traded firms' equity value in the United States over the 1961–1999 period using a newly assembled sample of National Labor Relations Board (NLRB) representation elections matched to stock market data. Event-study estimates show an average union effect on the equity value of the firm equivalent to $40,500 per unionized worker, an effect that takes 15 to 18 months after unionization to fully materialize, and one that could not be detected by a short-run event study. At the same time, point estimates from a regression discontinuity design—comparing the stock market impact of close union election wins to close losses—are considerably smaller and close to zero. We find a negative relationship between the cumulative abnormal returns and the vote share in support of the union, allowing us to reconcile these seemingly contradictory findings.
- DOI
- 10.1093/qje/qjr058
- Volume
- 127
- Issue
- 1
- Pages
- 333-378
- Language
- en
- Sources
- openalex crossref bibtex:phds-export.bib