Working papers results

In this paper, I investigate the role of family trajectory, i.e. the whole sequence of family events during the life course of early adults in shaping their health outcomes. I jointly consider union formation and childbearing, since the two life domains are highly connected and their intersections may have an effect on health outcomes. Data come from Wave I and Wave IV of the National Longitudinal Study of Adolescent Health (Add Health). The paper is divided in two parts. First, I focus on transitions and investigate if changes in timing (when events happen), quantum (what and how many transitions) and sequencing (in what order), have an effect on the health of young women. In the second part, I classify life course trajectories into six groups representing different ideal-types of family trajectories and I explore the association of these trajectories with health outcomes. Results suggest that family trajectories play an important role on different health outcomes. Controlling for selection and background characteristics, precocious and "non-normative" transitions are associated with lower self-reported health and higher propensity of smoking and drinking.

The paper analyses the impact of grandparenting on individuals' fertility behaviour using longitudinal data from eleven European countries. In particular, we focus on how siblings may share and compete for grandparents' time in terms of childcare. By considering different family scenarios, we show that availability of grandparenting play an important role in individuals' decision making for having children. Grandparenting is particularly important in the South of Europe where public childcare is limited and here we see a large impact of grandparenting on fertility.

In this paper we investigate the sensitivity of stochastic population forecasts produced by means of the Scaled Model of Error with respect to the choice of the correlation parameters. In particular, we evaluate the impact that a change in the specification of the correlation of the age-specific fertility forecast error increments across time and age and of the correlation of the age-specific mortality forecast error increments across time, age and sex has on the forecasts of the Total Fertility Rate and of the Male and Female Life Expectancies respectively. In our opinion a sensitivity analysis of this kind is extremely useful, since up to now the relevance and the impact of the choice of the Scaled Model of Error input parameters has not be discussed in detail. Such analysis will provide users with a better understanding of the model itself.

Using data from seven countries drawn from the Generations and Gender Survey, we study the relationship between informal childcare provided by grandparents and mothers' employment. The extent of formal childcare varies substantially across European countries and so does the role of grandparents in helping out rearing children. The extent of grandparenting also depends on their attitudes, which in turn relate to social norms and availability of public childcare, and hence the country context where individuals reside matters considerably. Within families, attitudes toward childcare are associated with attitudes towards women's working decisions. The fact that we do not observe these attitudes may bias the estimates. By using instrumental variable techniques we find that only in some countries mothers' employment is positively and significantly associated with grandparents providing childcare. In other countries, once we control for unobserved attitudes we do not find this effect.

We use actor-network theory (ANT) to understand how social workers in a large Italian local health authority might interact with a wiki space to share resources, inform practice, and maintain their professional identity. At the time of study, the wiki was proposed as a replacement technology for an existing structured knowledge management system (KMS). We introduce the case organization, the social workers and the problem and then describe the key concepts of ANT and how they can be used to guide socio-technical analysis of the potential for a proposed new information technology. ANT was applied in two ways. Firstly, we analyzed how the social workers' existing KMS came about, using the processes of translation as defined in ANT to reconstruct the events leading to that choice and the subsequent idea of replacing the KMS with a wiki. We then used a due process model and drew the actor-network in order to consider the wiki as a potential replacement for the existing KMS. As part of this process, we present the design of a seed structure and participation process for a wiki that would both maintain the value of KMS work done to date and meet additional needs for informal learning and maintenance of professional identity among the social workers. The successful adoption and sustainability of the wiki will depend on strengthening its association with the other stakeholders participating in the project.

The assumption that people make decisions based on a constant set of preferences, so that choices should not depend on context-specific cues (anchors), is one of the cornerstones of economic theory. We reexamined the effects of an anchoring manipulation on the valuation of common market goods that was introduced in Ariely, Lowenstein and Prelec (2003). We found much weaker anchoring effects. We performed the same manipulation on the evaluation of binary lotteries, and we found no anchoring effects. This suggests limits on the robustness of strong anchoring effects. Hence, the evidence that people have arbitrary preferences may not be conclusive, and economic theory may still be valid in many cases of interest.

We develop a method for the derivation of expert-based stochastic population forecasts. The full probability distribution of forecasts is specified by expert opinions on future developments, elicited conditional on the realization of high, central, low scenarios. The procedure is applied to forecast the Italian population, using scenarios from the Italian National Statistical Office (ISTAT) and the Statistical Office of the European Union (EUROSTAT).

Young people leave the parental home at different ages, and differences exist both between and within societies. To explain this heterogeneity, differences in earnings and employment, education and family formation are popular candidates. Comparative research has emphasised the importance of institutional arrangements, in particular the way state welfare systems are able to support young individuals in the transition to adulthood. It has been argued, however, that despite differences in welfare support, differences in social norms also play an important role. In this paper we make an attempt to explain the heterogeneity in individuals' perceptions of the age deadline for leaving home. Using information from the third round of the European Social Survey (ESS) we implement a series of multi-level regression models where we account both for country and regional heterogeneity. The idea is that contextual variables may affect individuals' perception of the age deadline, which in turn is likely to matter for the actual age of leaving home. Just as in the literature concerned with explaining actual behaviour, we find that strong normative differences between countries persist. We also find significant, though lower, regional variability in the analysis on the pooled set of European countries we have in our data set. Unemployment rate and education are found to have a strong role in explaining heterogeneity of norms at the country level, while religiosity influences age norms mostly at the regional level. This is consistent with the idea that cultural factors are important at the regional level while structural factors show their influence at the country level.

Using a cross-classified multilevel modelling approach, we study the probability  of living outside the parental home for second generation immigrants in Spain, a latest-late transition to adulthood country. We simultaneously take into account two sources of heterogeneity: the country of origin and the province of residence in Spain. Using micro-census data we are able to consider all main immigrant groups. We find that living arrangements vary extremely according to immigrants' origin, although a geographical clustering emerges. The cultural heritage, as represented for example by the mean age at marriage in the country of origin, still plays an important role in shaping second generation immigrants' patterns of co-residence with their parents. Even though the effect of the province of residence is less pronounced, it is not negligible. In particular, the cultural climate of the province, as measured by the proportion of cohabiting couples, is found to be influential for both immigrant and native young adults' living arrangements.

In this paper we examine how the use of Web 2.0 tools (such as Wikis, Blogs, Social Networking) might provide a digital foundation for a Transactive Memory System (TMS). TMS facilitate knowledge sharing and retrieval processes in groups by the use of a well-maintained knowledge directory. The theory of TMS explains how it is that a group appears to have a group mind and research shows that a well functioning TMS improves group performance. Web 2.0 software embeds data about authors, interested parties and related information into the content created in these tools, constituting essentially a knowledge directory which can be used to locate knowledge seekers or advise them of content they may be interested in. Consequently, the use of Web 2.0 tools may improve knowledge absorption and utilisation by supporting TMS. This is a conceptual paper, which seeks to provide a link between Web 2.0 and TMS and, by implication, enhancement in the functioning of groups and organisations.