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This paper investigates the seemingly puzzling situation in which legislators vote against a government of which they will become a part. Why are legislators from the coalition parties not fully disciplined in the investiture vote? Is it because of the type of government when the characteristics of the investiture vote is similar (a simple majority and an ex-post vote)? Using Israel and Italy as case studies, we demonstrate that when the type of government is an oversized coalition and the investiture consists of a simple majority and an ex-post vote (as a constant), legislators will be willing to vote against their party. We argue that they do so to express their disappointment with the positions they are offered and/or the policies that the coalition is adopting. Given the simple majority and oversized coalition, they are risking little and potentially reaping future rewards from their actions. [ABSTRACT FROM AUTHOR]