Second, F.indichoice has a negative (but not significant) effect on the degree of collusion when included on its own and has a positive and (mostly) highly significant effect when included together with F.indipayoffs.
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Second, F.indichoice has a negative (but not significant) effect on the degree of collusion when included on its own and has a positive and (mostly) highly significant effect when included together with F.indipayoffs.