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Theories of policy instrument choice have gone through several “generations” as theorists have moved from the analysis of individual instruments to comparative studies of instrument selection and the development of theories of instrument choice within implementation “mixes” or “governance strategies.” Current “next generation” theory on policy instruments centers on the question of the optimality of instrument choices. However, empirically assessing the nature of instrument mixes is quite a complex affair, involving considerable methodological difficulties and conceptual ambiguities related to the definition and measurement of policy sector and instruments and their interrelationships. Using materials generated by Canadian governments, this article examines the practical utility and drawbacks of three techniques used in the literature to inventory instruments and identify instrument ecologies and mixes: the conventional “policy domain” approach suggested by Burstein (1991 ); the “program” approach developed by Rose (1988a ); and the “legislative” approach used by Hosseus and Pal (1997 ). This article suggests that all three approaches must be used in order to develop even a modest inventory of policy instruments, but that additional problems exist with availability and accessibility of data, both in general and in terms of reconciling materials developed using these different approaches, which makes the analysis of instrument mixes a time‐consuming and expensive affair. 相似文献
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David Weaver 《政治交往》2013,30(3):421-422
The growth and dispersion of America’s immigrant population exposes increasing numbers of non-Hispanic Whites to Spanish. Yet the political impacts of that exposure depend on whether Democrats and Republicans respond in similar ways. To address that question, this article first presents survey experiments showing that exposure to Spanish increases restrictive immigration attitudes only among Republicans. To confirm the external validity of that result, the article then presents an analysis of California’s Proposition 227 indicating that support for ending bilingual education was higher in heavily White, Republican block groups with Spanish-language ballots. No such pattern appears in Democratic block groups. Together, these findings demonstrate that Spanish is a politicized symbol, provoking different responses among Whites depending on their partisanship. To the extent that other immigration-related cues produce similar effects, the salience of immigration seems likely to reinforce existing partisan divisions rather than undermining them. 相似文献
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Mark R. Wilson Ph.D. Scott C. Weaver Ph.D. Richard A. Winegar Ph.D. 《Journal of forensic sciences》2013,58(2):344-357
The forensic evaluation of viruses presents new challenges to the forensic science community. Although many criminal cases have been adjudicated involving the deliberate transmission of viruses, especially HIV, this review provides a general approach to viral forensics, especially in light of significant biodefense challenges. Newly emerging techniques of nucleic acid sequencing are discussed in a forensic context. Human mitochondrial DNA analysis, wherein mixed profiles are routinely assessed in a forensic context, provides the groundwork for an interpretational approach to the issue of mixed DNA sequences. The importance of phylogenetic classification is discussed as both providing an integrated graphical depiction of the structure of viral nucleic acid variation as well as offering a tool that can be used to assess the relatedness of complex populations of nucleic acids. 相似文献