Last time I was in London I had a headache, and went to the nearest Boots to buy something for it.
In U.S. drugstores, I'm accustomed to finding half an aisle devoted to headache pills, with bottles ranging from small to very large -- at least 200 pills in them. So that's what I went looking for in Boots, but no such bottle was to be found. The only options were cardboard packets containing maybe 20 pills, with each pill in its own blister packet. (The pills were also larger than U.S. pills.) Hmm, I thought. I guess Boots finds it can charge a lot for a small amount of headache medicine since most people, when they have a headache, aren't very price-conscious.
But I recently learned the real reason for this phenomenon while interviewing David Lester, a psychologist at the Richard Stockton College of New Jersey who is the dean of suicide (and death) research. (We are producing an hour-long Freakonomics Radio special on suicide.) We were discussing the efficacy of SSRI's on treating depression (and fighting suicide) when he explained why it's hard to find a big bottle of headache pills in England: