Exercise Meaningful in Having Good Mental Health

In this cross-sectional study, we analysed data from 1 237 194 people aged 18 years or older in the USA from the 2011, 2013, and 2015 Centers for Disease Control and Prevention Behavioral Risk Factors Surveillance System survey. We compared the number of days of bad self-reported mental health between individuals who exercised and those who did not, using an exact non-parametric matching procedure to balance the two groups in terms of age, race, gender, marital status, income, education l...

 High Rates of Return on College Education Comes with High...

Attending college has been considered one of the most protable investments, annualized returns ranging from 8% to 13% (Card 1999). I utilize a simple approach, as in Mehra and Prescott (1985), to quantify how much of the excess return to college is explained by its risk. I also explore the role played by heterogeneous ability by developing a life-cycle model with endogenous enrollment and analyzing the dropout risk effect on college returns. Under the risk premium approach, the permanent inc...

 Generational Replacement Behind Growth of Secularims

One important factor behind the growth of the religiously unaffiliated is generational replacement, the gradual supplanting of older generations by newer ones. Among the youngest Millennials (those ages 18-22, who were minors in 2007 and thus not eligible to be interviewed in Pew Research Center surveys conducted that year), fully one-third (34%) are religiously unaffiliated, compared with about one-in-ten members of the Silent Generation (9%) and one-in-twenty members of the World War II-era...