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Frequently in public policy analysis, researchers and decisionmakers confront the problems of building, testing, and interpreting a regression equation. This paper examines these general problems in the context of the efficiency of secondary schools in Karachi, Pakistan. It displays some of the tools of exploratory data analysis in constructing a regression model in the absence of a convincing, a priori specification. A simple and useful technique is presented for testing, after numerous statistical explorations, the model one has constructed. Finally, the paper takes seriously the differences between the policymaker's questions and the statistician's, providing some guidelines of general relevance for the interpretation of regression-based studies of public policy. 相似文献
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Donald E. Chambers 《政策研究评论》1985,5(2):230-240
Large numbers of the permanently and totally disabled have had benefits terminated since 1980 as a result of a determined effort towards that end by the Reagan administration. This is an example of the process by which a major change in political ethos is translated into important changes in welfare benefit entitlement rules. It is also interesting since it seems to be the first instance of a large scale conscientious attempt of the executive branch to reach into and narrow the basic entitlement policy of the Social Security Administration. This normally would be done through joint executive, congressional and legislative action. This article presents the policy background of these events and reviews and analyzes the data about their consequences. 相似文献
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Franklin E. Zimring 《Journal of criminal justice》1976,4(2):95-107
The first mass trace of handguns seized by the police revealed that a disproportionate number had been first sold to a retail customer in the relatively recent past. This study examines recent data from major metropolitan areas to test the “new guns” hypothesis. The consistency of the data from a variety of cities with different state and local handgun control strategies tends to confirm the hypothesis. The implications of this finding for firearms control policy and criminological theory are discussed. 相似文献
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M I Okoye D E Congdon W F Mueller 《The American journal of forensic medicine and pathology》1985,6(2):105-124
This report describes certain interesting postmortem findings in the hearts of five subjects who died suddenly, silently, and unexpectedly, and in whom the only significant abnormality at autopsy was asymmetric septal hypertrophy (ASH) of the heart. Deep clefts, cystic faults, and dilated vascular channels were not only seen within the septal myocardium in all the hearts, but also within the left ventricular free walls of two hearts. The septal myocardium and the left ventricular free walls of two hearts and the A-V node and His bundle of one heart demonstrated mural and luminal thrombi of several dilated vascular channels. In another heart, foci of cardiocytic myofibrillar degeneration were seen, especially close to narrowed small coronary vessels. Fetal dispersion and fibrosis of the A-V node and His bundle were evident in one heart. These abnormalities in the conducting system and the ventricular myocardium suggest that the hearts of subjects with ASH are not only excellent anatomic substrates for lethal arrhythmias, but also are bound to be hemodynamically impaired. We believe that conditions such as hypoxia, increased oxygen demand by the heart or abnormal sympathetic stimulus may easily trigger fatal arrhythmias in such individuals, thereby causing sudden death. 相似文献