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Nonparametric estimation of spatial segregation in a multivariate point process: bovine tuberculosis in Cornwall, UK 总被引:1,自引:0,他引:1
Peter Diggle Pingping Zheng Peter Durr 《Journal of the Royal Statistical Society. Series C, Applied statistics》2005,54(3):645-658
Summary. The paper is motivated by a problem in veterinary epidemiology, in which spatially referenced breakdowns of bovine tuberculosis are classified according to their genotype and year of occurrence. We develop a nonparametric method for addressing spatial segregation in the resulting multivariate spatial point process, with associated Monte Carlo tests for the null hypothesis that different genotypes are randomly intermingled and no temporal changes in spatial segregation. Our spatial segregation estimates use a kernel regression method with bandwidth selected by a multivariate cross-validated likelihood criterion. 相似文献
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This paper reports on a study of the employment situation of African American managers within New York State government. We argue that affirmative action, while having created employment opportunities for minority professionals, has also created racial submarkets in government. We identify three categories of jobs, a mainstream category and two sorts of minority categories, based on the racial composition of incumbents and constituencies that they serve. African Americans in minority submarket positions appear to have equal pay relative to comparable African Americans in mainstream jobs. They are less likely to have civil service job protection. There is limited mobility between submarkets; more professionals move from the mainstream to minority positions than vice versa. In the current period of budget reductions in state government, black professionals experience considerable job insecurity and express dissatisfaction with the policies that created the minority submarket. 相似文献
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