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The paper shows that if the class of admissible preference orderings is restricted in a manner appropriate for economic and political models, then Arrow's impossibility theorem for social welfare functions continues to be valid. Specifically if the space of alternatives is R + n , n ≥ 3, where each dimension represents a different public good and if each person's preferences are restricted to be convex, continuous, and strictly monotonic, then no social welfare function exists that satisfies unanimity, independence of irrelevant alternatives, and nondictatorship.  相似文献   
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A state law has placed an obligation on the criminal investigation laboratories to screen and quantitate all preparations, both pharmaceutical and illicit, that fall under the provisions of "Excepted Substances." Without complete screens on these preparations, there is room for erroneous indictments as well as possible acquittals on technicalities.  相似文献   
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Radical change in the representative dimension of Italy's political system was expected to bring a transition to a 'Second Republic' in Italy. That has not happened. Nevertheless, after three consultations using the new parliamentary electoral system, studies focusing on the 'input' side of Italian politics are beginning to agree that substantial change has occurred. It is, however, too early to identify the extent of change in public administration and centre–local government relations, whilst even in parliament it is argued that consensual decision-making continued at least into the late 1990s. The impact of party system change on policy-making has thus been shown to be less direct than many expected, providing rich material for research into the relationship between institutional and policy change. Nevertheless, institutional change continues, particularly with regard to the decentralisation of government, and some studies suggest that this is the key to Italy's political transformation, rather than electoral reform or even change in the form of government. Still, the election of Italy's first right-wing majority government in 2001 may yet bring change in parliamentary practice and policy-making more generally.  相似文献   
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Theories of democratic government traditionally have relied on a model of organization in which officials act impartially, accept clear lines of accountability and supervision, and define their day–to–day activities through rules, procedures, and confined discretion. In the past 10 years, however, a serious challenge to this ideal has been mounted by critics and reformers who favor market, network, or "mixed–economy" models. We assess the extent to which these new models have influenced the work orientations of frontline staff using three alternative service types—corporate, market, and network—to that proposed by the traditional, procedural model of public bureaucracy. Using surveys of frontline officials in four countries where the revolution in ideas has been accompanied by a revolution in methods for organizing government services, we measure the degree to which the new models are operating as service–delivery norms. A new corporate–market hybrid (called "enterprise governance") and a new network type have become significant models for the organization of frontline work in public programs.  相似文献   
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