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641.
DAVID F. PREUSSER ALLAN F. WILLIAMS PAUL L. ZADOR RICHARD D. BLOMBERG 《Law & policy》1984,6(1):115-128
Twelve states in the U.S. have curfew laws, which prohibit young drivers from operating motor vehicles during late evening or early morning hours. The effect of such laws on motor vehicle crashes was studied in four of these states. In each state the laws were found substantially to reduce the crashes of sixteen year olds. Sixteen year old driver crash involvements during curfew hours were reduced by an estimated 69 percent in Pennsylvania, 62 percent in New York, 40 percent in Maryland, and 25 percent in Louisiana. Except in Maryland, the percentage of the sixteen year old population licensed was lower in curfew than comparison states. It is possible that curfew laws reduce early licensure, in which case reductions in crash involvements resulting from curfews are greater than shown above. 相似文献
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Quantitative analysis of competitive tendering and contracting typically focuses on their effect on the cost of providing public sector services. In this article we turn to the systematic factors that appear to influence the performance of cleaning contracts. This is defined as compliance with contract specification, public perception of service quality and other qualitative measures of service characteristics as observed by the contracting authority. Our analysis attempts to isolate particular features of contract design, monitoring and enforcement that influence performance positively or negatively. Econometric results based on a sample of public sector cleaning contracts suggest that contractor selection procedures and contract enforcement mechanisms have the greatest influence on performance. 相似文献
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DAVID WILLETTS 《Public administration》1987,65(4):443-454
The Prime Minister's Policy Unit, also known as the Number 10 Policy Unit, comprises a team of about eight advisers each responsible for briefing her in a major area of policy (ecluding such issues as foreign policy and security). Together with three secretaries they occupy a set of rooms straddling 10 and 11 Downing Street (a modest encroachment on the Chancellor's residence of such long standing that it appears not to be resented). 相似文献
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