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The model makes a distinction between "voluntary" and "involuntary" welfare receipt. the findings suggest that among female heads of households, the increase in welfare receipt that occured between 1967 and 1979 was almost completely attributable to an increase in involuntary unemployment and an increase in the proportion of the population that was eligible for welfare (due to changes in program parameters). The passage of time, used as a proxy for changes in the stigma associated with receiving welfare, appears to be a secondary importance. The labor supply response to welfare programs is small, and possibly diminishing over time.  相似文献   
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The drive to welfare reform has revolutionalized the relationship between the state and the third sector in many countries. But this article argues that, if we are to understand the impact of the changing role of the state on the third sector, then we must first understand the dynamics of the relationship between national and local government. It compares two countries—the U.K. and Italy—where national-local government relations have developed in different directions, and suggests a number of avenues for further analysis of this three-way relationship.  相似文献   
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Statistical Methods & Applications - A necessary condition for identification of latent class models is that the number of unknown independent parameters must not be greater than the number of...  相似文献   
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Teaching how to derive minimax decision rules can be challenging because of the lack of examples that are simple enough to be used in the classroom. Motivated by this challenge, we provide a new example that illustrates the use of standard techniques in the derivation of optimal decision rules under the Bayes and minimax approaches. We discuss how to predict the value of an unknown quantity, θ ∈ {0, 1}, given the opinions of n experts. An important example of such crowdsourcing problem occurs in modern cosmology, where θ indicates whether a given galaxy is merging or not, and Y1, …, Yn are the opinions from n astronomers regarding θ. We use the obtained prediction rules to discuss advantages and disadvantages of the Bayes and minimax approaches to decision theory. The material presented here is intended to be taught to first-year graduate students.  相似文献   
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