Does Mental Productivity Decline with Age? Evidence from Chess Players We use data on international chess tournaments to study the relationship between age and mental productivity in a brain-intensive profession. We show that less talented players tend to leave the game in the earliest phases of their career. When the effects of age on productivity vary with unobserved ability, commonly used fi...

introduction: public and occupational exposure to extremely low frequency (elf) electric and magnetic fields induced by electrical equipment is a significant issue in the environment and at the workplace due to their potential health effects on public health. the purpose of this study was assessment of the electric and magnetic fields intensities and determination of mental and psychological ef...

Two previous meta-analyses concluded that average validity coefficients for the Rorschach and the MMPI have similar magnitudes (L. Atkinson, 1986; K. C. H. Parker, R. K. Hanson, & J. Hunsley, 1988), but methodological problems in both meta-analyses may have impeded acceptance of these results (H. N. Garb, C. M. Florio, & W. M. Grove, 1998). We conducted a new meta-analysis comparing criterionre...

This paper examines the relationship between income and the extent of material hardship and explores other factors that might affect hardship. Using panel data from the Women’s Employment Study (WES), we examine the incidence of material hardship from 1997 to 2003 among current and former welfare recipients. We then consider the extent to which alternative income measures are associated with th...

Identifying Sorting: In Theory We argue that using wage data alone, it is virtually impossible to identify whether Assortative Matching between worker and firm types is positive or negative. In standard competitive matching models the wages are determined by the marginal contribution of a worker, and the marginal contribution might be higher or lower for low productivity firms depending on the ...

In this paper, we examine the relationship between airline frequencies and delays under different route structures taking advantage of aggregated data of large US airports for the period 2005-2013. We run regressions using airline and airport fixed effects to control for different heterogeneities in data. Results of the empirical analysis show airlines operating under hub-and-spoke route struct...

The Effect of Benefits on Single Motherhood in Europe This paper uses data from the eight waves of the European Community Household Panel (1994-2001) to estimate the impact of welfare benefits on the incidence of single motherhood and headship among young women across European countries. The regressions include country fixed effects as well as time trends that are allowed to vary by country, to...

Panel data from the Household, Income and Labour Dynamics in Australia Survey are used to examine the impact of involuntary job loss on the mental health of spouses and adolescent children. Estimates from fixed effects models show that the mental health of women (but not men) declines following a spouse’s job loss, but only if that job loss results in a sustained period of non-employment or if ...