A provocative article:
"In the United States, at least 9 percent of school-aged children have been diagnosed with ADHD, and are taking pharmaceutical medications. In France, the percentage of kids diagnosed and medicated for ADHD is less than .5 percent. How has the epidemic of ADHD—firmly established in the U.S.—almost completely passed over children in France?"
Why French Kids Don't Have ADHD in Psychology Today.