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301.
Firing costs, together with the legislative and regulatory frameworks governing employment relations, are often blamed for poor labour market outcomes. Yet, research on the economic impacts of these costs is inconclusive. There has been much focus on functional assumptions and the significance of parameters, but very little on the quality and precision of the cost measures upon which most results hinge. Reviewing the indirect and direct measurement methods commonly used, the author argues that direct quantitative methods, rarely used in research, are much needed to complement more popular indirect measures. A recent survey experiment conducted in Australia illustrates this point.  相似文献   
302.
In a multiperson household, indivisibilities or other externalities may imply that optimal decisions involve explicit randomizations. This issue is orthogonal to the standard distinction between unitary and collective models; it arises even when the household aggregates individual utilities through a Samuelsonian index.  相似文献   
303.
We report on an ongoing survey of attitudes toward gambling in the two main cities of Cameroon, Douala and Yaounde. From the data it appears that lottery playing in Cameroon is an answer to the economic crisis that has plagued the country for some years. The results are similar to the ones obtained in previous Canadian, American and other studies in various countries.We thank Alain Njoh Soppo and Martin Tiako, students at the business school of the University of Douala (ESSEC) who collected the data for their Mémoire de fin d'études. We also thank our research assistant, Alain Tremblay, for his help and CIDA, ESSEC and Loto-Québec for their financial help. All remaining errors are solely our own.  相似文献   
304.
Maternal support offered to sexually abused children following disclosure may be a crucial factor in children's recovery. A person-centered approach was used to examine how profiles of nonoffending mothers could better describe their ability to support their children after disclosure. Cluster analyses based on a total of 226 nonoffending mothers recruited from child protective services yielded four distinctive groups of mothers: resilient, avoidant-coping, traumatized, and anger-oriented reaction. These profiles differed on measures of support, parenting, and variables related to attitude following disclosure. The discussion underscores the relevance of adopting a tailored approach to intervention with mothers of sexually abused children.  相似文献   
305.

This article argues that social science representations of post-1965 Black immigrants in the United States employ the concept of "ethnicity" in ways that reinforce the racialist myth of Black (American) cultural inferiority. Specifically, the discursive use of Black immigrant "ethnic" and "cultural distinctiveness," while admittedly reflecting an important recognition of the heterogeneity of the United States Black populations, is in fact predicated upon a repackaged "culture of poverty" discourse that serves to reaffirm the overarching racial order. In a discussion of the theoretical and historical development of the concept, I show how the current discourse of "ethnic distinctiveness" perpetuates a form of racism under a theory that denies the relevance of race while it continuously recodes the biological notions of race as "culture." Thus, Black immigrant distinctiveness, when presented through the prism of the cultural narratives of ethnicity, allows for the perpetuation of a "cultural racism" that adversely affects all Blacks in this country. I therefore call for a rejection of ethnicity theory as it is currently conceptualized and suggest the need to ground theories of Black distinctiveness within analyses of power relations and ongoing practices of racial subjugation.  相似文献   
306.
Breast-feeding is the focus of rapidly growing interest. Research on the determinants of breast-feeding is only beginning. The research in this paper is based on World Fertility Survey data for Sri Lanka. We develop what we believe to be an appropriate probit model and find that there are significant socioeconomic factors that influence breast-feeding, in addition to the demographic factors focused upon in the literature. Moreover, some of them have clear policy implications, which are elaborated herein with respect to labor force, education, family planning and internal migration policies. In the course of the paper we also address a number of generally neglected statistical issues that should be considered in analyzing the determinants of breastfeeding, including problems resulting from digit preference or age heaping, the need to use dichotomous dependent variables, unavoidable truncation biases in the basic data, and structural shifts in the determinants of breastfeeding at different durations.  相似文献   
307.
308.
    
We present a Bayesian model selection approach to estimate the intrinsic dimensionality of a high-dimensional dataset. To this end, we introduce a novel formulation of the probabilisitic principal component analysis model based on a normal-gamma prior distribution. In this context, we exhibit a closed-form expression of the marginal likelihood which allows to infer an optimal number of components. We also propose a heuristic based on the expected shape of the marginal likelihood curve in order to choose the hyperparameters. In nonasymptotic frameworks, we show on simulated data that this exact dimensionality selection approach is competitive with both Bayesian and frequentist state-of-the-art methods.  相似文献   
309.
    
We statistically analyze a multivariate Heath-Jarrow-Morton diffusion model with stochastic volatility. The volatility process of the first factor is left totally unspecified while the volatility of the second factor is the product of an unknown process and an exponential function of time to maturity. This exponential term includes some real parameter measuring the rate of increase of the second factor as time goes to maturity. From historical data, we efficiently estimate the time to maturity parameter in the sense of constructing an estimator that achieves an optimal information bound in a semiparametric setting. We also nonparametrically identify the paths of the volatility processes and achieve minimax bounds. We address the problem of degeneracy that occurs when the dimension of the process is greater than two, and give in particular optimal limit theorems under suitable regularity assumptions on the drift process. We consistently analyze the numerical behavior of our estimators on simulated and real datasets of prices of forward contracts on electricity markets.  相似文献   
310.
    
This study examines the identity transition of women when they become mothers and return to work. Twenty‐two first‐time mothers were interviewed at two points in time: just after giving birth and on re‐entry into employment after maternity leave. The findings suggest that this transition is influenced by multiple factors on different levels which include individual factors, such as partner support and career aspirations, organizational factors such as family‐friendly work practices and role models, and societal factors such as social norms and attitudes towards the maternal body. The findings highlight the importance of context by stressing the interrelated nature of factors on the micro‐, meso‐ and macro‐level in order to better understand the identity transition to motherhood.  相似文献   
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