Are The Young Becoming More Disabled?

Are the Young Becoming More Disabled? -- Appendix

Are US Industries Becoming More Concentrated?

More than 75% of US industries have experienced an increase in concentration levels over the last two decades. Firms in industries with the largest increases in product market concentration have enjoyed higher profit margins, positive abnormal stock returns, and more profitable M&A deals, suggesting that market power is becoming an important source of value. Lax enforcement of antitrust regulat...

Are U.S. Corn and Soybeans Becoming More Drought Tolerant?

An objective drought index that measures the dry and hot conditions adversely affecting crop yields is used in a regression analysis to test whether corn and soybeans have become more drought tolerant. Results indicate that corn yield losses from a drought of a given severity, whether measured in quantity terms or as a percentage of mean yield, have decreased over time. The null hypothesis that...

Young , Male and Disabled

The urban geography of thirteenthand fourteenth-century Paris suggests that propertied Parisians placed poor young men who needed help in crossing the threshold to adulthood near the top of their list of poor people who were in need of charitable assistance. Indeed, only widows and other elderly unattached women outranked such boys. By 1342 Paris had ten shelters for poor unattached women and a...

Why are psychiatric disorders in children becoming more and more common?

UNLABELLED In the last decades, an increase of new paediatric problems requiring medical care like eating disorders, behavioural and attention problems has been observed. Based on the hypothesis that mental illness is accompanied by autonomic dysfunction, we compared measurements of heart rate variability (HRV) in Holter ECG's from children with attention deficit/hyperactivity disorder (ADHD) w...