Sam I am

Peltzman, of the famous Peltzman Effect, which the New York Times finally decides to taste;

[Retired Formula 1 racing driver Michael] Schumacher’s injury also focused attention on an unsettling trend. Although skiers and snowboarders in the United States are wearing helmets more than ever — 70 percent of all participants, nearly triple the number from 2003 — there has been no reduction in the number of snow-sports-related fatalities or brain injuries in the country, according to the National Ski Areas Association.

Experts ascribe that seemingly implausible correlation to the inability of helmets to prevent serious head injuries like Schumacher’s and to the fact that more skiers and snowboarders are engaging in risky behaviors: skiing faster, jumping higher and going out of bounds.

Which is a textbook example of the Peltzman Effect, but you'll not find a mention of that in the Newspaper of Record's story. Which is a shame, since there are much wider implications;