Class Solidarity or Representation Gaps? Union Attitudes Among Formal and Informal Workers in Argentina and Chile

ABSTRACT This article examines whether formal and informal workers in Argentina and Chile hold different attitudes toward labor unions. Engaging debates on labor-market dualism and union revitalization, we assess the representation gap hypothesis—which expects weaker union support among outsiders—against the class solidarity hypothesis, which anticipates broadly similar orientations across labor-market positions. Using original 2025 survey data from both countries, we find limited evidence of a systematic insider–outsider divide. Although informal self-employed workers sometimes express more skeptical views, most attitudes among informal workers are statistically indistinguishable from—and in some cases more favorable than—those of formal workers. Cross-nationally, Argentine workers tend to assign greater importance to unions, while Chilean workers report higher willingness to unionize. Taken together, these findings suggest that the representation gap thesis may not fully capture workers’ orientations and point to the potential relevance of solidaristic dynamics shaped by national institutional and political contexts.