Determinants of Bicameral Conflict: The Formation of Conference Committees in Chile, 1990-2018

Abstract

ABSTRACTIn some countries, bicameral discrepancies are solved by the formation of a conference committee. In Chile, conference committees are exclusively and automatically formed when the second chamber rejects a bill passed in the first chamber or when the first chamber rejects the modifications to its original bill made by the second chamber. This article postulates 4 hypotheses for the determinants of conference committee formation. It tests them for the case of Chile’s sequential legislative process (1990–2018) using 2,183 bills that reached the stage where a conference committee could be formed. The 482 conference committees that resulted were more likely to be formed when chambers were controlled by different majorities, when passage required special voting thresholds, when bills were more important for the president, and when the bills had more approved amendments, but they were not more likely if the bill was introduced by legislators rather than the executive.