Analytical representation of probabilities under the IAC condition

This paper extends the work of Gehrlein and Fishburn (1976) and Gehrlein (1982) by providing a general theorem relating to the analytical representation of the probability of an event in a given space of profiles. It applies to any event characterized by a set of linear inequalities regardless of whether the coefficients defining the inequalities are integer or fractional coefficients. An algorithm for the probability calculation is also suggested. This suggested methodology is used to provide a complete characterization of the vulnerability properties of the four scoring rules studied in Lepelley and Mbih (1994) to manipulation by coalitions in a 3-alternative n-agent society. Received: 21 October 1997/Accepted 19 November 1998     

Unequal returns to social capital: the study of Malays in Singapore through a network lens

Using the concepts of ‘social capital deficit’ and ‘return deficit’, this study considers the social network aspects of social disadvantage among Malays in Singapore, as compared to Singaporean Chinese. Analysing a 2005 representative survey, we find Malays have less social capital than Chinese, a social capital deficit partly explained by their lower educational attainment. We find no return deficit in earnings: that is, every additional unit of social capital increases earnings equally for Chinese and Malays. However, we find return deficits in education: every additional unit of social capital (e.g. ties to educated parents) increases educational attainment more for Chinese than Malays. In all, this study offers a social capital explanation for Malay ‘plight’, complementing the more conventional explanations of human and economic capital.     

Sexual fantasy experiences and guilt among conservative Christians: An exploratory study

This study examines the sexual fantasy experiences and cognitive‐affective evaluations in a sample of conservative Christians. The study also operationalizes and documents fantasy guilt as an entity distinct from the more broadly defined category of sex guilt. Respondents reported normative fantasy categories and frequencies of fantasy occurrences. Concomitantly, fantasy episodes were experienced along with substantial to high levels of guilt over fantasizing. Findings show a complex interrelationship between a subject's cognitions, emotions, and fantasy guilt. These point to the import this sample gives to learned cognitions in furthering guilt, over and above the content or frequency of the fantasy experience itself.     

Continuing Social Work Education: Results of a Delphi Survey

This study addresses the need for social work professionals to remain current with the changing bases of knowledge and skills that impact on their daily experience. Continuing social work education is assumed to be one of the most effective means of avoiding professional obsolescence. The purposes of the study were to achieve a level of consensus relative to theories, methodologies, and content areas of continuing social work education and then to project a functional model of continuing social work education useful for intermediate and long-range program planning.     

MIMCA: multiple imputation for categorical variables with multiple correspondence analysis

We propose a multiple imputation method to deal with incomplete categorical data. This method imputes the missing entries using the principal component method dedicated to categorical data: multiple correspondence analysis (MCA). The uncertainty concerning the parameters of the imputation model is reflected using a non-parametric bootstrap. Multiple imputation using MCA (MIMCA) requires estimating a small number of parameters due to the dimensionality reduction property of MCA. It allows the user to impute a large range of data sets. In particular, a high number of categories per variable, a high number of variables or a small number of individuals are not an issue for MIMCA. Through a simulation study based on real data sets, the method is assessed and compared to the reference methods (multiple imputation using the loglinear model, multiple imputation by logistic regressions) as well to the latest works on the topic (multiple imputation by random forests or by the Dirichlet process mixture of products of multinomial distributions model). The proposed method provides a good point estimate of the parameters of the analysis model considered, such as the coefficients of a main effects logistic regression model, and a reliable estimate of the variability of the estimators. In addition, MIMCA has the great advantage that it is substantially less time consuming on data sets of high dimensions than the other multiple imputation methods.     

Adaptive density estimation: A curse of support?

This paper deals with the classical problem of density estimation on the real line. Most of the existing papers devoted to minimax properties assume that the support of the underlying density is bounded and known. But this assumption may be very difficult to handle in practice. In this work, we show that, exactly as a curse of dimensionality exists when the data lie in R^d, there exists a curse of support as well when the support of the density is infinite. As for the dimensionality problem where the rates of convergence deteriorate when the dimension grows, the minimax rates of convergence may deteriorate as well when the support becomes infinite. This problem is not purely theoretical since the simulations show that the support-dependent methods are really affected in practice by the size of the density support, or by the weight of the density tail. We propose a method based on a biorthogonal wavelet thresholding rule that is adaptive with respect to the nature of the support and the regularity of the signal, but that is also robust in practice to this curse of support. The threshold, that is proposed here, is very accurately calibrated so that the gap between optimal theoretical and practical tuning parameters is almost filled.     

Colonial Military Garrisons as Labor-Market Shocks: Quebec City and Boston, 1760–1775

The military occupation of Boston in 1768 shocked the city's labor market. The soldiers, who were expected to supplement their pay by working for local businesses, constituted an influx equal to 12.5 percent of greater Boston's population. To assess the importance of this shock, we use the case of Quebec City, which experienced the reverse process (i.e., a reduction in the British military presence from close to 18 percent of the region's population to less than 1 percent). We argue that, in Boston, the combination of the large influx of soldiers and a heavy tax on the local population in the form of the billeting system caused an important wage reduction, while the lighter billeting system of Quebec City and the winding down of the garrison pushed wages up. We tie these experiences to political developments in the 1770s.     

POSTSTRUCTURALISM IN FAMILY THERAPY: INTERROGATING THE NARRATIVE/CONVERSATINAL MODE

The narrative/conversational mode of family therapy, based in constructivism and Batesonian cybernetics, has lately associated itself with the poststructuralism of Foucault and Derrida. The narrative/conversational models of White and Epston (1990) and de Shazer (1991) draw only selectively from Foucault and Derrida's ideas and so perpetuate the constructivist neglect of social context and power. Disregarded aspects of Foucault and Derrida's work do contribute to an under-standing of social context and power. Poststructuralism is a dubious prop for constructivist assumptions: its true merit is in its capacity to illuminate the political/cultural context of our practice, including family therapy as a social institution.