The Foundations of Limited Authoritarian Government: Institutions and Power-sharing in Dictatorships∗ Carles Boix† and Milan W. Svolik‡ Word count: 11,921 Abstract Why do dictatorships establish institutions that may constrain their leaders? We propose a new theory of institutions and power-sharing in dictatorships. We argue that by facilitating power-sharing, political institutions promote the survival of dictatorships. However, authoritarian power-sharing succeeds only when it is backed by a credible threat of a rebellion by the dictator’s allies. Whereas the allies’ political opportunities determine the credibility of the threat of a rebellion, institutions alleviate the commitment and moni- toring problems caused by the secrecy in authoritarian governance. We use both historical and large-N data to assess new empirical predictions about the relationship between po- litical institutions, dictator tenures, and the concentration of power in dictatorships. ∗We would like to thank Al´ıcia Adser`a, Bruce Bueno de Mesquita, Barbara Geddes, Bonnie Weir, the participants at seminars and conferences at Princeton, Berkeley, University of Illinois at Urbana-Champaign, and the APSA, IPES, ISA and MPSA annual conventions for helpful comments and Aya Kachi for research assistance. †Department of Politics and Woodrow Wilson School of Public and International Affairs, Princeton Univer- sity. Email:
[email protected]. ‡Department of Political Science, University of Illinois at Urbana-Champaign. Email:
[email protected]. 1 Introduction In the vast majority of authoritarian regimes, dictators govern with the help of political institutions such as parties, legislatures, advisory councils, or committees of notables. With the exception of the 1970s, over 70 percent of dictatorships between 1950 and 1999 have had either a legislature or at least one political party (Figure 1).