Job strain in different types of employment affects the immune response

The immune system, in cooperation with neuroendocrine functions, defends from cancer and infections mainly by the activity of blood natural killer (NK) cells. Blood NK activity may be influenced by the type of employment since work is the central part of life; moreover, job stress is a situation affecting both neuroendocrine and immune systems. This study examines anxiety (by STAI 1 and 2), job strain (by the Karasek's JCQ) and blood NK activity (by an in vitro radio-isotopic method) of 134 male workers. These men, over 38 years old with stable employment, were working in factories, in construction yards, in offices, as hospital attendants or as self-employed craftsmen. Workers in factories and in construction yards, with high job strain, showed lower NK activity, while office employees, with low job demand, and craftsmen with low anxiety and elevated decision latitude, showed higher NK activity; the level of NK activity of the hospital attendants was between the other groups. In conclusion, this study confirms that the type of employment, related to job stress, affects blood NK activity. Moreover, blood NK activity may be used in the bio-monitoring of workers at high risk.     

The knowledge management of micro-firms in the crowd: key challenges for successful operations*

Abstract

Crowdfunding platforms are increasingly being used by small and micro-firms to fund the development and initial promotion of their new products. The transition from a crowdfunding campaign to the subsequent operational phase is critical to successfully fulfil the expectations of the backers who supported the micro-firm and expect to receive the new product. This paper analyzes the main challenges that must be faced by micro-firms during this transition, adopting the perspective of knowledge management theory. Based on an exploratory case study analysis, the paper highlights the particularities of these knowledge management challenges in terms of knowledge diversity, dependence and novelty. Asymmetry, dispersion, synchronization, a lack of a common understanding and backer lock-in are the main knowledge-based challenges for the operations of micro-firms that use crowdfunding. Various theoretical and practical implications of the findings are offered.     

Cross-Country Assessment of Systemic Risk in the European Stock Market: Evidence from a CoVaR Analysis

Social Indicators Research - This work is intended to assess the contribution to systemic risk of major companies in the European stock market on a geographical basis. We use the EuroStoxx 50 Index...     

A conceptual framework of the adoption of innovations in organizations: a meta-analytical review of the literature

Journal of Management and Governance - Studies on the adoption of innovations in organizations are abundant and have introduced many different factors that are likely to influence adoption...     

Modelling the impact of women’s education on fertility in Malawi

Many studies have suggested that there is an inverse relationship between education and number of children among women from sub-Saharan Africa countries, including Malawi. However, a crucial limitation of these analyses is that they do not control for the potential endogeneity of education. The aim of our study is to estimate the role of women’s education on their number of children in Malawi, accounting for the possible presence of endogeneity and for nonlinear effects of continuous observed confounders. Our analysis is based on micro data from the 2010 Malawi Demographic Health Survey, and uses a flexible instrumental variable regression approach. The results suggest that the relationship of interest is affected by endogeneity and exhibits an inverted U-shape among women living in rural areas of Malawi, whereas it exhibits an inverse (nonlinear) relationship for women living in urban areas.     

Collective consumption: an application to the passive drinking effect

This study introduces a new collective complete demand system with individual Engel effects that is easy to estimate and permits undertaking policy analysis at the individual rather than household level. Previous estimations of collective demand were limited to single equations. The empirical application investigates the passive drinking effect, that is, whether consumption of alcohol affects the distribution of resources among household members and their level of wellbeing. The results show that a high level of alcohol consumption of one household member significantly affects the allocation of household resources and suggest thought-provoking policy implications.     

Early Retirement in Italy: Recent Trends

Abstract. The analysis presented provides new statistical information on pensioners receiving seniority retirement benefits and highlights the positive effects of specific factors on their pension income. The statistical estimates suggest that work incentives are weak and steady job exits before the normal retirement age continue, especially for civil servants. In particular, since seniority benefits are based on a long contribution history, their corresponding level of pension income is high. This is not true for pensioners receiving old age benefits because of their incomplete work history.     

Città Aperta o Cultura Chiusa?: The Homosexualization of Fascism in the Perverted Cultural Memory of the Italian Left

The essay analyzes the equation of Fascism and homosexuality offered by two founding works of the Italian left-wing Neorealist movement: Roberto Rossellini's film Roma, città aperta (1945) and Vasco Pratolini's novel Cronache di poveri amanti (1947). By identifying Fascism and homosexuality, both works limited their commemoration of the victims of Fascism to heterosexuals and contributed to the erasure of a gay and lesbian Holocaust from historical memory. As shown by Carlo Lizzani's film Celluloide (1996) and the coverage of the World Pride 2000 by the Communist daily Liberazione, briefly analyzed at the end of the essay, the Italian Left has still not found a satisfactory way of dealing with the homophobic legacy of Neo-realism.     

Graphics for studying logistic regression models

In this article we focus on logistic regression models for binary responses. An existing result shows that the log-odds can be modelled depending on the log of the ratio between the conditional densities of the predictors given the response variable. This suggests that relevant statistical information could be extracted investigating the inverse problem. Thus, we present different methods for studying the log-density ratio through graphs, which allow us to select which predictors are needed, and how they should be included in a logistic regression model. We also discuss data analysis examples based on real datasets available in literature in order to provide further insights into the methodology proposed.     

Archimedean copulae for risk measurement

In this paper some Archimedean copula functions for bivariate financial returns are studied. The choice of this family is due to their ability to capture the tail dependence, which is an association measure we can detect in many bivariate financial time-series. A time-varying version of these copulae is also investigated. Finally, the Value-at-Risk is computed and its performance is compared across different copula specifications.