Uncertain discount and hyperbolic preferences

This paper studies the interaction between savagean uncertainty and time preferences. We introduce a variation of the discounted subjective expected utility model, where time preferences are state dependent. Before uncertainty is resolved, the individual is unsure about the discount factor that will be used, even when evaluating certain payoffs. The model can account for the present bias and diminishing impatience, even if the future is discounted geometrically. The present bias disappears when the immediate payoff becomes uncertain. Although preferences are not stationary, choices may be time consistent.     

Time Use by Gender and Quality of Life

Italy has no survey that was specifically designed to measure the degree of quality of life for the population, although certain other surveys exist which contribute useful information on the issue. This paper will concentrate on the potential of using existing sample surveys and on initial studies carried out starting from the Time Use survey conducted by the National Statistical Institute in 1989.Daily activities are the key factor when analysing a person's quality of life, however, these must also be considered in context. First and foremost this context is the household, within which each person carries out more or less defined roles. The roles covered are, in fact, a crucial variable when evaluating each person's quality of life. This angle of obsevation is particularly instructive when seen in terms of developments from a gender standpoint. Interpreting a woman's lifestyle according to the presence of symmeetry of asymmetry of roles, accompanying this analysis with one covering subjective perception of satisfaction as to daily activities, is an essential approach for determining the real satisfaction derived from the different aspects of a person's daily life. In addition to conventional indicators, newly conceived indicators taking into account the division of roles can be of great help when carrying out this kind of study. In this sense the analysis of individual time use in relation to household time use represents a significant step forward when studying quality of life.     

Family Constellations and Life Satisfaction in Europe

Existing research on family and well-being has generally focused on the traditional family, and has largely ignored the increasing diversity in family forms and relations. Our aim in this paper is to help fill this gap by investigating the extent of the relationship between living arrangements and life satisfaction (LS) in Europe. We examined variations in life satisfaction by applying a multilevel approach (i.e., individuals nested in countries) to data from the 2007 European Quality of Life Survey. First, we found that levels of life satisfaction among families consisting of couples with children were significantly higher than among people in other (less typical) family arrangements. Second, our results illustrate that after the socioeconomic situation of the family was taken into account, the influence of family status on LS disappeared almost completely. Overall, our findings suggest that the lower levels of life satisfaction experienced by people living in atypical families can be largely attributed to their weaker socioeconomic position.     

An approximation algorithm for the maximum spectral subgraph problem

Journal of Combinatorial Optimization - Modifying the topology of a network to mitigate the spread of an epidemic with epidemiological constant $$\lambda $$ amounts to the NP-hard problem of...     

Ecological Democracy

The term “ecological democracy”, is used here to indicate an alternative democratic model, critical towards laissez-faire, but not anti-liberal. The foundations of this model are in the common capital of the knowledge of social sciences. The paradox of collective action, the existence of entitlements to resources before market trading and of externalities. Ecological democracy is utilized as metaphor to analyze two politically relevant problems of contemporary society: the uncertain legitimacy of the international institutions and the lack of institutionalization of the social movements.     

Likelihood-based inference for the transmuted log-logistic model in the presence of right-censored data

Although new transmuted distributions have been widely proposed in the last few years, it is rarely to find those class of models applied in survival analysis in the presence of censored lifetimes. In this context, we are concerned in applying the transmuted log-logistic model in the study of discharge times of patients treated with the Linezolid drug. For model fitting, we use and compare different profile likelihood methods. Analysis of residuals and influence are also presented. All results are validated in a simulation study by considering the bootstrap techniques.     

Entrepreneurship research: mapping intellectual structures and research trends

Review of Managerial Science - Using bibliometric techniques to identify connections between existing entrepreneurship studies, this article seeks to understand the scientific structure of...