Spanish journals of social work

Now that the European Space for Higher Education has granted full presence to social work in Spanish Universities, it becomes necessary to develop a series of strategies that allow its consolidation and equivalence with other Social Sciences. Although scientific publications count among the most adequate ways to achieve this purpose, there is no Spanish journal of social work in the main international databases. This article analyses the Spanish journals of social work published in Spain. It examines their characteristics, their place in the global system of knowledge and offers strategies for their improvement.     

Cryptosporidium Dose-Response Studies: Variation Between Hosts

The issue of variation is highly important in dose-response analysis: variation among genetically related pathogens infecting the same host, but also variation among hosts, in susceptibility to infection by the same pathogen. This latter issue is addressed here for the protozoan parasite Cryptosporidium parvum, the causative agent for many outbreaks of water-borne gastrointestinal illness. In human feeding studies, infectivity has been shown to be low in subjects with high preexisting anti-Cryptosporidium IgG-levels. Here we adapt the hit theory model of microbial infection to incorporate covariables, characterizing the immune status of the susceptible host. The probability of any single oocyst in the inoculum to cause infection appears to depend on preexisting IgG-levels. This does not necessarily imply direct protection by the humoral immune system; high IgG-levels may reflect a recent episode of infection/illness, and be an epi-phenomenon associated with other protective responses. The IgG-dependence of the dose-response relation can be easily applied in quantitative risk analysis. The distribution of anti-Cryptosporidium IgG levels in the general population is accessible by analyzing serum banks, which are maintained in many Western countries. Using such an approach provides first insights into the variation of susceptibility to infection in the general population.     

Optimal designs based on exact confidence regions for parameter estimation of a nonlinear regression model

This paper is concerned with the proposal of optimality criteria, referred to as X  - and X^′$X^{\prime }$-optimality criteria, and the construction of X  - and X^′$X^{\prime }$-optimal designs, for nonlinear regression models. These optimal designs aim at improving the estimation of parameters of this class of models. The principle of these criteria is the minimization, with respect to the design, of the expected volume of a particular exact parametric confidence region. In this paper we give detailed definitions, properties, and computation methods of X  - and X^′$X^{\prime }$-optimal designs. We also compare these designs with the classic local D-optimal designs, with regard to robustness and efficiency, for two very well-known academic models (Box–Lucas and Michaelis–Menten models).     

Analyzing Religiosity within an Economic Framework: The Case of Spanish Catholics

Using a sample of Spanish Catholics, we examined the level of religiosity (measured by beliefs, prayer and church attendance) and the relationship between religiosity and various socio-economic variables. An Ordered Logit estimation of religiosity equations showed that: women are more religious than men; religious activity increases with age; there is a (marginally) significant positive relationship between schooling and religiosity; religiosity is positively related to exposure to religious activity during childhood; and male religious activity is positively affected by marital status (being married to a Catholic wife) and by the number of children at home. The results also demonstrate the importance of the "salvation motive" for the two genders and the presence of the "professional utilitarian motive" in male religious behavior.     

Parental religiosity and daughters’ fertility: the case of Catholics in southern Europe

Preferences, including preferences for children, are shaped during the formative years of childhood. It is therefore essential to include exposure to religious practice during childhood in an attempt to establish a link between religiosity and fertility. This path has not been explored in the documented literature that looks at the relationship between current religiosity and fertility. The International Social Survey Programme: Religion II (ISSP) provides the data base. It includes information on maternal/paternal/own mass participation when the respondent was a child (nine levels each), as well as on his current churchgoing (six levels) and prayer habits (eleven levels). These variables are included as explanatory variables in ‘fertility equations’ that explain the number of children of Catholic women in Spain and Italy. The core findings are that exposure to religiosity during the formative years of childhood, has a pronounced effect on women’s ‘taste for children’ that later on translates into the number of her offspring. In Spain, the two parents have major opposite effects on women. Most striking is the negative effect of the mother’s intensity of church attendance on her daughter’s fertility: Women who were raised by an intensively practicing mother have on average one child less that their counterparts who were raised by a less religious mother. On the other hand, an intensively practicing father encourages the daughter to have more children (by about 0.8, on average). The Italian sample confirms the statistically significant negative effect of the mother’s religiosity. The father’s religious conduct has apparently no effect on Italian women’s birth rates. Current religiosity seems to be irrelevant, both in Spain and in Italy. It follows that religiosity and fertility are interrelated but the mechanism is probably different from the simplistic causality that is suggested in the literature.