Matias Iaryczower - Assistant Professor of Politics - Princeton University
My research is in Political Economy and Positive Political Theory. I study how institutions and strategic interactions shape collective decision-making in legislatures, courts and electorates. My work uses Game Theory and Quantitative Methods. [CV
- 17. "More than Politics: Ideology and Information in the British Appellate Committee", with Gabriel Katz. Online Appendix.
We show that a hybrid model of judicial behavior that incorporates features of both the legal and attitudinal models explains voting decisions of members of the House of Lords remarkably well, and improves the fit of the ideological decision-making model. Our results support a more nuanced view of judicial decision-making, in which Law Lords are not either merely finding how the facts of the case fit into the body of the law, nor freely creating law to match their individual preferences.
We estimate an empirical model of voting in Congress that accounts for uncertainty and private information about the quality of the proposal. We show that seniority and uncompetitive elections lead to higher ideological rigidity and curtail the role of information in policy-making.
In a model of decentralized bargaining in legislatures, we show that some parties can endogenously emerge as brokers in equilibrium, transferring resources and voting rights between two parties that wouldn't negotiate directly with one another.
We estimate a model of voting with incomplete information in which committee members (judges in the US courts of appeals) can communicate before voting. We compare the probability of mistakes with deliberation with a counterfactual of no communication. We find that deliberation can lead to large potential losses, and in the best case scenario only produces a small potential gain in the effectiveness of the court.
Contributions have a large effect on the behavior of individual judges -- affecting the probability that they vote to overturn and the probability that they vote incorrectly -- but they have a small effect on the decisions and effectiveness of the Court.
- 12. "Choosing Policy-Makers: Learning From Past Decisions in a Changing Environment", with Andrea Mattozzi. Under Revision.
A politician sets policy in a changing environment, while a voter learns about the ability of the politician. In this setting we ask: under what conditions are policies responsive to information and informative about the ability of the politician?
Justices that are shielded from voters' influence on average (i) have better information, (ii) are more likely to change their preconceived opinions about a case, and (iii) make less mistakes than their elected counterparts.
We estimate an equilibrium model of decision-making in the Court that takes into account both private information and ideological differences between justices. Our results suggest a sizable value of information in the court: in roughly one out of two cases, justices' initial leanings (given by their prior beliefs and ideological biases) are overpowered by their case-specific information.
Proportional elections have more candidates, competing less aggressively in campaign spending, than those in majoritarian elections.
Spending caps and compulsory voting can be pro-competitive in non-majoritarian electoral systems, leading to a larger number of parties contesting the election.
We estimate a model of voting in Congress that allows for dispersed information about the quality of proposals in an equilibrium context. The results highlight the effects of bicameralism on policy outcomes. In equilibrium, the Senate imposes an endogenous supermajority rule of about four-fifths on members of the House.
We consider strategic voting in sequential committees in a common value setting with incomplete information. We show that the tally of votes in the originating committee can aggregate and transmit relevant information for members of the second committee in equilibrium, and provide conditions for the composition and size of committees under which this occurs.
- 5. "Many Enemies, Much Honor? On the Competitiveness of Elections in Proportional Representation Systems", with Andrea Mattozzi. In Aragones, E., Bevia, C., Llavador, H., Schofield, N., Eds., The Political Economy of Democracy, fundacion BBVA, 2008.
Changes in the cost of running for office or shifts in the cost of increasing the perception of quality induce a positive correlation between the equilibrium number of candidates running for office and their campaign spending.
Party discipline is endogenously determined by backbenchers' beliefs about the extent of support to the leader within the party. We show that rewards/punishments that can be distributed publicly and on the spot (as opposed to promises of future benefits) are necessary for the leader to be powerful.
We provide conditions for judicial decisions to be sensitive to legislative lobbying, and find that lobbying falls the more divided the legislature is on the relevant issues. We apply this framework to analyze supreme court labor decisions in Argentina.
- 2. "The Supreme Court," with Pablo T. Spiller and Mariano Tommasi, in Pablo Spiller and Mariano Tommasi (eds.), The Institutional Foundations of Public Policy in Argentina: A Transaction Cost Approach, 2007, Cambridge University Press.
Argentina's Supreme Court in the broader political context.
We examine the independence of Argentina's Supreme Court. Our results show an often defiant Court subject to constraints. The probability of voting against the government increases the less aligned a justice is with the President, but falls the stronger the control of the President over the legislature.
Work in Progress
- "Competing for Loyalty: The Dynamics of Political Support", with Santiago Oliveros.
- "Project Size in Agency Relationships", with Nemanja Antic.
- "The Dynamics of Policy and Electoral Considerations in the US Senate", with Gabriel Lopez, Adam Meirowitz and Matt Shum.
- "Policy Choices and Political Advertising in Electoral Competition", with Jidong Chen.
- "Do Women Change Strategic Deliberation in the Court?", with Xiaoxia Shi and Matt Shum.
- "A Ranking of Unicameral and Bicameral Systems under Strategic Voting".
Other Working Papers and Publications (In Spanish)
- The Institutional Sources of Development in Argentina. Towards an Institutional Agenda. 2000. Editorial Universitaria de Buenos Aires UNDP-CEDI. Project Directors: Mariano Tommasi and Pablo Spiller.