"The NBER Bulletin on Aging and Health provides summaries of publications like this. You can sign up to receive the NBER Bulletin on Aging and Health by email. Over 20 states have adopted laws requiring youths to wear a helmet when riding a bicycle. We confirm previous research indicating that...

Analyzing data spanning three decades covering the near universe of births, we study county-level differences in Cesarean section (C-section) rates among first-time mothers of singleton births. Our research reveals persistent geographic variation in C- section rates for both low- and high-risk...