What can we learn about correlations from multinomial probit estimates?

It is well known that, in a multinomial probit, only the covariance matrix of the location and scale normalized utilities are identified. In this note, we explore the relation between these identifiable parameters and the original elements of the covariance matrix, to find out what can be learnt about the correlations between the stochastic components of the non-normalized utilities.

Opt Out Or Top Up? Voluntary Healthcare Insurance And The Public Vs. Private Substitution

We investigate whether people enrolled into voluntary health insurance (VHI) substitute public consumption with private (opt out) or just enlarge their private consumption, without reducing reliance upon public provisions (top up). We study the case of Italy, where a mixed insurance system is in place. To this purpose, we specify a joint model for public and private specialist visits counts, and allow for different degrees of endogenous supplementary insurance coverage, looking at the insurance coverage as driven by a trinomial choice process. We disentangle the effect of income and wealth by going through two channels: the direct impact on the demand for healthcare and that due to selection into VHI. We find evidence of opting out: richer and wealthier individuals consume more private services and concomitantly reduce those services publicly provided through selection into for-profit VHI. These results imply that the market for VHI eases the redistribution from high income (doubly insured) individuals to low income (not doubly insured) ones operated by the Italian National Health Service (NHS). Accounting for VHI endogeneity in the joint model of the two counts is crucial to this conclusion.

On Intergenerational Transmission of Reading Habits in Italy: Is a Good Example the Best Sermon?

The intergenerational transmission of preference and attitudes has been less investigated in the literature than the intergenerational transmission of education and income. Using the Italian Time Use Survey (2002-2003) conducted by ISTAT, we analyse the intergenerational transmission of reading habits: are children more likely to allocate time to studying and reading when they observe their parents doing the same activity? The intergeneration transmission of attitudes towards studying and reading can be explained by both cultural and educational transmission from parents to children and by imitating behaviours. The latter channel is of particular interest, since it entails a direct influence parents may have on child’s preference formation through their role model, and it opens the scope for active policies aimed at promoting good parents’ behaviours. We follow two fundamental approaches to estimation: a “long run” model, consisting of OLS intergenerational type regressions for the reading habit, and “short run” household fixed effect models, where we aim at identifying the impact of the role model exerted by parents, exploiting different exposure of sibling to parents’ example within the same household. Our long run results show that children are more likely to read and study when they live with parents that are used to read. Mothers seem to be more important than fathers in this type of intergenerational transmission. Moreover, the short run analysis shows that there is an imitation effect: in the day of the survey children are more likely to read after they saw either the mother or the father reading.

Women's employment, children and transition: an empirical analysis on Poland

The effect of transition from centrally planned to market economies on female employment is unclear a-priori. Many studies have pointed out that the emergence of labour markets created obstacles to but also new opportunities for women’s employment. A frequently mentioned potential explanation of the lower female participation during the transition period is represented by the reduction of childcare facilities, which created a major constraint on the participation of women with dependent children. However, we must not forget the effect of forces of opposite sign, first of all the household necessity of having two earners during the turbulent transition period. The aim of this paper is to give an empirical assessment on how the transition to a market economy affected the relationship between motherhood and labour force outcomes in Poland. We estimate random effects probit models on two PACO panel datasets covering a four year period before the reform (1987-1990) and a three year period afterwards (1994-1996). Our findings indicate that during transition small children were much less of a deterrent to the employment probability of their mother than it was before transition