Streamlining for democracy: Intercultural predispositions of the Croatian secondary school population

This work interprets the results of empirical research conducted into the intercultural predispositions of secondary school students in Croatia. Data were collected in 1993 and in 1998, using specially constructed questionnaires in which, for a variety of democratic values, a Likert-type battery of questions, were given to respondents. In 1993 the stratified research sample consisted only of secondary school students, while in 1998 the research sample also included students, parents and teachers. An analysis of the results shows that: (1) students had, generally speaking, affirmative attitudes both in 1993 and 1998 and that the hierarchy of support for these values remained the same; and (2) all three groups examined in 1998 shared a common hierarchy of values. However, they differed in the degree to which they accepted democratic values; teachers ranked the highest, students the lowest. The fact that students' attitudes were much closer to their parents' than to their teachers' leads to the conclusion that schools are not the major factor in the "political" socialization of young people in Croatia. This indicates a need for the introduction of new curriculum in all secondary schools. This curriculum should include educational content that emphasizes democratic values and intercultural relations, and methods that stress students' participation through action, reciprocity, dialogue, and solidarity, led by well-trained teachers.     

Refusal Bias in the Estimation of HIV Prevalence

In 2007, UNAIDS corrected estimates of global HIV prevalence downward from 40 million to 33 million based on a methodological shift from sentinel surveillance to population-based surveys. Since then, population-based surveys are considered the gold standard for estimating HIV prevalence. However, prevalence rates based on representative surveys may be biased because of nonresponse. This article investigates one potential source of nonresponse bias: refusal to participate in the HIV test. We use the identity of randomly assigned interviewers to identify the participation effect and estimate HIV prevalence rates corrected for unobservable characteristics with a Heckman selection model. The analysis is based on a survey of 1,992 individuals in urban Namibia, which included an HIV test. We find that the bias resulting from refusal is not significant for the overall sample. However, a detailed analysis using kernel density estimates shows that the bias is substantial for the younger and the poorer population. Nonparticipants in these subsamples are estimated to be three times more likely to be HIV-positive than participants. The difference is particularly pronounced for women. Prevalence rates that ignore this selection effect may be seriously biased for specific target groups, leading to misallocation of resources for prevention and treatment.