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No Substitute for Experience: Presidents, Advisers, and Information in Group Decision Making


Despite advances in the study of individuals in international relations, we still know little about how the traits and biases of individuals aggregate. Most foreign policy decisions are made in groups, usually by elites with varying degrees of experience, which can have both positive and negative psychological effects. This paper addresses the aggregation problem by exploring how the balance of foreign policy experience among leaders and advisers affects decision making in war, using a principal-agent framework that allows the relative experience of leaders and advisers to vary. A leader's experience affects decision making and, ultimately, the risks associated with conflict, through three mechanisms. First, experience influences a leader's ability to monitor advisers. Second, a leader's experience affects the credibility of delegation to experienced advisers and, in turn, the nature and extent of information gathering. Third, experience affects whether leaders are able to diversify advice, as well as their preference for policies that appear certain. I illustrate the argument using two cases that hold an unusual number of factors constant: the 1991 and 2003 Iraq Wars. George W. Bush's inexperience exacerbated the biases of his advisers, whereas his father's experience cast a long shadow over many of the same officials. Understanding the experience and biases of any one individual is insufficient—the balance of experience within a group is also important. Experience is therefore not fungible: a seasoned team cannot substitute for an experienced leader.

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International Organization
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