Do Unions Shape Political Ideologies at Work?

Abstract: Labor unions influence economic outcomes not only through bargaining with employers over work contracts but also via political activities that can profoundly shape political systems. In unionized workplaces, they may mobilize and change the ideological positions of both unionizing workers and their non-unionizing management. In this paper, we analyze the workplace-level impact of unionization on workers' and managers' political campaign contributions in the United States from 1980 to 2016. To do so, we link establishment-level union election data with transaction-level campaign contributions to federal and local candidates. Using a difference-in-differences design, validated through regression discontinuity tests and a novel instrumental variable approach, we find that unionization leads to a leftward shift of campaign contributions. Unionization increases the support for Democrats relative to Republicans not only among workers but also among managers, suggesting that it fosters political alignment between the two groups. Our findings are not driven by compositional changes of the workforce and are stronger in establishments where, after union certification, the employer and union agree on a collective bargaining agreement.

• The paper finds unionization significantly increases political contributions to Democrats relative to Republicans among both workers and managers.
• Specifically, unionization correlates with a 12 percentage point increase in Democratic contributions among workers and a 20 percentage point increase among managers within six years.
• The study employs difference-in-differences and regression discontinuity designs using data from over 6,000 U.S. union elections between 1980 and 2016.

The Influence of Unionization on Political Ideologies at Work

This paper investigates the impact of labor unionization on political ideologies within the workplace, focusing on the United States. Specifically, it examines how unionization affects workers' and managers' campaign contributions to federal and local political candidates. Using a combination of a difference-in-differences (DiD) design, regression discontinuity tests, and a novel instrumental variables approach, the authors find that unionization significantly increases the support for Democratic candidates relative to Republican candidates among both workers and managers.

Methodology

The research employs data from over 6,000 union elections in the U.S. conducted between 1980 and 2016. It matches these elections to data on political campaign contributions, allowing for an analysis of changes in political behavior at the establishment level. The researchers use a DiD framework to compare establishments where unions won elections against those where they lost. This approach is supplemented by regression discontinuity designs to validate the assumptions necessary for the DiD analysis and an instrumental variables strategy leveraging exogenous variations in workplace safety concerns as shocks affecting union election outcomes.

Key Findings

1. Increased Political Support for Democrats: The study finds that unionization leads to an 11% increase in total campaign contributions from workers during the election cycle, suggesting a short-term boost in political mobilization. Most notably, it reports a 12 percentage point increase in the percentage of workers' contributions to Democrats versus Republicans in the six years following union elections.
2. Managerial Shift in Ideology: Remarkably, unionization also shifts managers' political contributions leftward. Managers in unionized workplaces show a 20 percentage point increase in contributions to Democrats relative to Republicans. This effect suggests that unionization can bridge ideological divides between workers and managers, contrary to the potential expectation of increased workplace tensions.
3. Robustness and Causality: The analysis finds no significant pre-treatment trends, supporting the parallel trends assumption necessary for causal interpretation. Robustness checks, including alternative DiD estimators, reinforce the reliability of the findings.
4. Role of Right-to-Work Laws: The paper reveals that the observed political effects are less pronounced in states with Right-to-Work laws, where unions face resource constraints for political activities due to reduced membership dues.
5. Differentiation by Union Type: The analysis does not find significant differences in the political effects across unions with varying ideological stances, as measured by campaign finance scores of the unions themselves, suggesting that unions' political activities rather than their ideological leanings drive the observed shifts.

Implications

The findings have significant implications for understanding the political landscape in unionized settings. By demonstrating that unionization can influence managerial as well as worker political ideologies, the study suggests a potential mechanism through which unions contribute to broader political shifts beyond traditional labor policy advocacy.

In a broader context, these results contribute to discussions about the role of unions in shaping political ideologies and electoral outcomes. As union membership declines, understanding the channels through which unions affect political preferences becomes essential, offering insights into the potential repercussions of reduced union influence on political polarization.

Future Directions

The study opens avenues for further exploration into how unions might serve as facilitators of political dialogue between workers and managers, potentially reducing workplace and broader societal polarization. Additionally, understanding the specific mechanisms through which unions influence managerial attitudes towards organizational policies and political ideologies could offer deeper insights into labor-management relations.

Overall, this research enhances our understanding of the political dimension of unionization and underscores the importance of organizational contexts in shaping political behavior, offering a nuanced view of the role of unions in the contemporary political economy.