What drives politics in dictatorships? Milan W. Svolik argues authoritarian regimes must resolve two fundamental conflicts. Dictators face threats from the masses over which they rule - the problem of authoritarian control. Secondly from the elites with whom dictators rule - the problem of authoritarian power-sharing. Using the tools of game theory, Svolik explains why some dictators establish personal autocracy and stay in power for decades; why elsewhere leadership changes are regular and institutionalized, as in contemporary China; why some dictatorships are ruled by soldiers, as Uganda was under Idi Amin; why many authoritarian regimes, such as PRI-era Mexico, maintain regime-sanctioned political parties; and why a country's authoritarian past casts a long shadow over its prospects for democracy, as the unfolding events of the Arab Spring reveal. Svolik complements these and other historical case studies with the statistical analysis on institutions, leaders and ruling coalitions across dictatorships from 1946 to 2008.

Why do some dictatorships establish institutions that may constrain their leaders? We argue that institutions promote the survival of dictatorships by facilitating authoritarian power-sharing. Specifically, institutions such as parties, legislatures, and advisory councils alleviate commitment and monitoring problems between the dictator and his allies caused by the secrecy in authoritarian governance. However, because authoritarian power-sharing succeeds only when it is backed by a credible threat of a rebellion by the dictator's allies, institutions will be ineffective or break down when an imbalance of power within the ruling coalition undermines this threat's credibility. Our arguments clarify the complex interaction between collective action, commitment, and monitoring problems in authoritarian governance. We use both historical and large-N data to assess new empirical predictions about the relationship between political institutions, leader survival, and the concentration of power in dictatorships.

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Is support for democracy in the United States robust enough to deter undemocratic behavior by elected politicians? We develop a model of the public as a democratic check and evaluate it using two empirical strategies: an original, nationally representative candidate-choice experiment in which some politicians take positions that violate key democratic principles, and a natural experiment that occurred during Montana’s 2017 special election for the U.S. House. Our research design allows us to infer Americans’ willingness to trade-off democratic principles for other valid but potentially conflicting considerations such as political ideology, partisan loyalty, and policy preferences. We find the U.S. public’s viability as a democratic check to be strikingly limited: only a small fraction of Americans prioritize democratic principles in their electoral choices, and their tendency to do so is decreasing in several measures of polarization, including the strength of partisanship, policy extremism, and candidate platform divergence. Our findings echo classic arguments about the importance of political moderation and cross-cutting cleavages for democratic stability and highlight the dangers that polarization represents for democracy.

I examine a fundamental problem of politics in authoritarian regimes: the dictator and the ruling coalition must share power and govern in an environment where political influence must be backed by a credible threat of violence. I develop a model of authoritarian politics in which power sharing is complicated by this conflict of interest: by exploiting his position, the dictator may acquire more power at the expense of the ruling coalition, which may attempt to deter such opportunism by threatening to stage a coup. Two power-sharing regimes, contested and established dictatorships, may emerge as a result of strategic behavior by the dictator and the ruling coalition. This theory accounts for the large variation in the duration of dictators' tenures and the concentration of power in dictatorships over time, and it contributes to our understanding of the dynamics of power sharing and accountability in authoritarian regimes.