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Abstract: The view that minority governments are anomalies in parliamentary systems has been long abandoned. In presidential systems, however, minority and governments are still seen as problematic, especially when combined with unilateral powers of the president. This paper analyzes government formation in an original sample of 14 Latin American countries between 1979 and 2011, including coalitional changes in the same presidential term. Based on 287 observations, we test some current hypotheses about the political and institutional determinants of minority governments. Unlike the predictions of some theories, the results show that the main factors that increase the probability of formation of minority governments are the veto power of the president, low parliamentary fragmentation and the existence of few agenda-setting powers by the president.