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