Event dependent sampling of recurrent events

The effect of event-dependent sampling of processes consisting of recurrent events is investigated when analyzing whether the risk of recurrence increases with event count. We study the situation where processes are selected for study if an event occurs in a certain selection interval. Motivation comes from psychiatric epidemiology where repeated hospital admissions are studied for patients with affective disease, as seen in Kessing et al. (Acta Psychiatr Scand 109:339–344, 2004b). For the selected processes, either only disease course from selection and onwards is used in the analysis, or, both retrospective and prospective disease course histories are used. We examine two methods to correct for the selection depending on which data are used in the analysis. In the first case, the conditional distribution of the process given the pre-selection history is determined. In the second case, an inverse-probability-of-selection weighting scheme is suggested. The ability of the methods to correct for the bias due to selection is investigated with simulations. Furthermore, the methods are applied to affective disease data from a register-based study (Kessing et al. Br J Psychiatry 185:372–377, 2004a) and from a long-term clinical study (Kessing et al. Acta Psychiatr Scand 109:339–344, 2004b).     

Can higher life expectancy induce more schooling and earlier retirement?

In this paper, we show that it may be optimal for individuals to educate more and retire earlier when life expectancy increases. This result reconciles the findings of Hazan (Econometrica 77:1829–1863, 2009) with theory. Further, the paper contributes to a better understanding of the conflicting empirical findings on the causal effect on income per capita from increased life expectancy.     

Association between repetitive work and occupational cold exposure

Occupational cold exposure is an important risk factor that increases stress at work and can induce many health effects like diseases and symptoms related to cold, including work-related musculoskeletal disorders. The methodological procedures were performed to measure these environmental variables as recommended by the ISO 7726/85. For the analysis of repetitiveness was used the OCRA checklist and evaluation of musculoskeletal morbidity conducted by the Nordic Musculoskeletal Questionnaire. So the objective of this study was to investigate the correlation between cold environmental variables and prevalence of musculoskeletal morbidity in the repetitive work. Was found association between work in cutting and boning sector (occupational cold and repetitive work) and the presence of musculoskeletal morbidity, with a significance of 99%.     

Slaughterhouse workers exposed to cold: proposal of reference thermography values for hands

The cold environment is an indispensable for slaughtering and processing in the poultry industry In field studies it was observed that a large percentage of workers of this sector have hand contact with the cold chicken and / or frozen, have high complaints prevalence of pain and discomfort, mostly in the hands. The contact of human skin with a cold surface may cause pain, numbness and risk of skin damage. Currently, although the use of infrared thermal imaging has been useful in identifying normal and abnormal patterns of heat distribution on the surface of the body. However your use for work tasks and to assess the potential development of injuries related to it has been limited. Based on the physiological responses can be objectively evaluate the effects of the task demands of work and thus contribute to the development of effective strategies for ergonomic intervention. The methodology will be used to evaluate the subjective thermal sensation with analogue scale of ASHRAE and the infrared thermography in the dorsal and palmar hands. Thus the objective of this research is to propose reference values for thermographic hands within limits of comfort.     

FISCAL FEDERALISM,DECENTRALIZATION, AND ECONOMIC GROWTH: A META‐ANALYSIS

The theoretical literature on fiscal federalism has identified several channels through which government decentralization could affect economic growth. Much of the literature focuses on the efficiency aspects of a decentralized provision of public services, but decentralization may also increase growth by raising the ability of the political system to innovate and carry out reforms. In contrast, some authors argue that decentralization increases corruption and government inefficiency, and thus may diminish growth. Given this theoretical ambiguity, several studies have attempted to identify the effect of decentralization on economic growth empirically over the last two decades. We review and conduct a meta‐analysis of this empirical literature. Based on our analysis, we point out open questions and discuss possible ways to answer them. (JEL H77, O43, C52)     

RESERVE PRICE EFFECTS IN AUCTIONS: ESTIMATES FROM MULTIPLE REGRESSION‐DISCONTINUITY DESIGNS

We present evidence from 260,000 online auctions of second‐hand cars to identify the impact of public reserve prices on auction outcomes. We exploit multiple discontinuities in the relationship between reserve prices and vehicle characteristics to present causal regression‐discontinuity estimates of reserve price impacts. We find an increase in reserve price decreases the number of bidders, increases the likelihood the object remains unsold, and increases expected revenue conditional on sale. We then combine these estimates to calibrate the reserve price effect on the auctioneer's ex ante expected revenue. This reveals the auctioneer's reserve price policy to be locally optimal. (JEL D44, L11, L62)     

Psychological Weil-Being Among Unemployed and Employed People After a Company Closedown: A Longitudinal Study

In a three-year longitudinal study, we examined the effects of unemployment and the fear of becoming unemployed on the psychological well-being of 1153 employees at a shipyard that was closed down, and a control group of 441 employees from another, operative shipyard. On all three questionnaires, unemployed people were significantly lower in psychological well-being than employed people. Change to or from employment was significantly associated with changes in psychological well-being, whereas remaining employed or unemployed did not lead to any systematic changes in psychological well-being. Among employed people, the fear of unemployment was strongly associated with reduced psychological well-being. Thus, the health-related consequences of unemployment affect not only the unemployed but also employed people who have little job security. Consequently, we stress the need to create new workplaces and to implement reforms that can reduce job insecurity in the labor market.     

Mental Health Among Mexican-Origin Immigrant Families: The Roles of Cumulative Sociodemographic Risk and Immigrant-Related Stress

The current study examined the unique effects of cumulative sociodemographic risk and immigrant-related stress on mental health symptoms among Mexican-origin immigrant parents and their school-age children. Further, this study tested whether the effects of cumulative sociodemographic risk and immigrant-related stress on child mental health were mediated by parent mental health. Participants included 104 Mexican-origin immigrant families. Families in the study had a child between the ages of 6 and 10 (M_age = 8.39; 61% female). Data were collected across three time points spaced 6 months apart. Immigrant-related stress was found to predict parent mental health, which in turn predicted child mental health. Cumulative sociodemographic risk did not predict parent or child mental health. Mental health symptoms generally decreased over time, but for children, change in mental health symptoms depended on parent mental health symptoms. Given the high levels of mental health symptoms among Mexican-origin parents and children, reducing a context of stress and promoting mental health interventions for Mexican-origin immigrants is critical.