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We develop the concept of a policy bubble to capture the notion of long‐term overinvestment in a policy. In sketching the relation of policy bubbles to economic bubbles, we describe how these two concepts have similar origins but different trajectories because they are filtered by different institutions. We examine in some detail three likely instances of ongoing policy bubbles: crime policy, school reform (charter schools and private education vouchers), and the contracting and privatization of public services. We show how these cases differ from the housing bubble of 1997–2007, how they differ from each other, and the extent to which they can be considered policy bubbles. Last, we suggest this concept can help unify the policy process literature with the practice of policy evaluation and outline testable hypotheses for future research. 相似文献
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Studies of political attention often focus on attention to a single issue, such as front‐page coverage of the economy. However, examining attention to a single issue without accounting for the agenda as a whole can lead to faulty assumptions. One solution is to consider the diversity of attention; that is, how narrowly or widely attention is distributed across items (e.g., issues on an agenda or, at a lower level, frames in an issue debate). Attention diversity is an important variable in its own right, offering insight into how agendas vary in their accessibility to policy problems and perspectives. Yet despite the importance of attention diversity, we lack a standard for how best to measure it. This paper focuses on the four most commonly used measures: the inverse Herfindahl Index, Shannon's H, and their normalized versions. We discuss the purposes of these measures and compare them through simulations and using three real‐world datasets. We conclude that both Shannon's H and its normalized form are better measures, minimizing the danger of spurious findings that could result from the less sensitive Herfindahl measures. The choice between the Shannon's H measures should be made based on whether variance in the total number of possible items (e.g., issues) is meaningful. 相似文献
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J. HARVIE WILKINSON III 《Journal of Supreme Court History》2006,31(1):81-90
I cannot tell you what a pleasure it is to be at the Supreme Court Historical Society. Of course, the Supreme Court is fortunate to have a Chief Justice who is also Chief Historian. I have read each of Chief Justice Rehnquist's books on the Court, and they are engagingly written narratives filled with a love and knowledge of this institution. The Chief Justice is steeped in the folklore of this remarkable Court as few have ever been. This is just one reason those of us throughout the federal judiciary admire and love the Chief. He has shown kindness to me ever since I was a young law clerk for Justice Lewis Powell. I don't know if it's appropriate or not to dedicate a speech, but I am going to do so anyway. This speech is for him. 相似文献
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