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We present an experimental approach to study the micro-dynamics of coalition formation in an unrestricted bargaining environment. Specifically, we investigate a fundamental feature of sequential coalition bargaining models: expectations about future bargaining behavior will influence current bargaining outcomes. To do so, we test the hypothesis that coalition bargaining may lead to inefficient outcomes as agents are unable to effectively commit to preliminary agreements during the bargaining process. We conjecture that communication plays an important role in establishing such commitments. We then experimentally manipulate the communication channels and show that restrictions undermine trust and lead to decreased efficiency. Adapted from the source document.

Mediation has competing short‐ and long‐term effects. In the short run, the actors are better able to identify and settle on a mutually satisfying outcome. In the long run, mediation can create artificial incentives that, as the mediator's influence wanes and the combatants' demands change, leave the actors with an agreement less durable than one that would have been achieved without mediation. This article tests the observable implications from this logic using a set of international crises from 1918 to 2001. The results reconcile findings in the previous literature that inconsistently portray the effectiveness of mediation.

Using the change in party control of the Senate that resulted from Jim Jeffords's 2001 change in party affiliation, we compare competing partisan and partyless legislative theories. We offer a reconceptualization of agenda control that provides a new and promising basis for studying parties and policymaking in the Senate. Also, we present a novel methodology—an "event study"—to test partisan and partyless hypotheses. Our results show that, when Jeffords switched, the stock prices of Republican‐supported energy firms dropped and prices for Democrat‐supported firms rose, supporting the hypothesis that the majority party influences Senate decisions.

This paper studies the determinants of immigration policy in an economy with entrepreneurs and workers where a trade union has market power over wages. The presence of the union induces a social welfare maximizing government to implement a high level of immigration, leading to a welfare loss not only from an aggregate point of view but also from the workers' point of view. When interest group politics prevails and workers' ability to influence the policy-maker is strengthened by existence of the union, we show the conditions under which workers may benefit from the presence of the union. Adapted from the source document.