Table 5. Multiple regressions provide support for both hypotheses. Hypothesis 1 - Increasing ethnic diversity reduces community cooperation and perceptions of collective action efforts. Hypothesis 2 - Ethnic dominance additionally reduces cooperation and collective action perceptions. The effects of the FRAC variable support of both dominance and diversity hypotheses because membership in a larger ethnic group simultaneously decreases ethnic diversity and increases ethnic power differentials, the fundamental aspect of ethnic dominance. Perceptions of cooperation Support for Hypothesis Workdays Adequacy Fairness H1: diversity damages cooperation, perceptions of cooperation Yes Workdays decline with diversity, increase with FRAC No Adequacy increases with diversity Yes Fairness increases with FRAC H2: dominance damages cooperation, perceptions of cooperation Yes Workdays increase with FRAC - Yes Fairness increases with FRAC decreases with DALIT