Talking about a very topical issue in Britain, Tim Harford explains why flood insurance is so expensive for some areas:
I’m not sure this is really an insurance problem.
How could it not be an insurance problem?
It seems to me that there are three kinds of hard-to-insure risks. First, there are unimaginable events, “unknown unknowns”, if you like. Yet floods are all too easy to imagine. Then there are risks that are subject to what economists call adverse selection. To take an extreme example, imagine a town ruled by some all-powerful Mob. Nobody in this town is ever robbed without warning. The Mob will be sure to let you know what’s coming to you and why they think you deserve it.
[. . .]
But that doesn’t sound like a good description of flood risk.
Quite so. Now the third kind of hard-to-insure risk is stuff that’s expensive and happens quite often. I’m trying to buy a house, I’m nearly 40 and so I’m trying to buy insurance for my family in case I die or become too ill to work. This is perfectly possible: it’s just expensive, because it’s not unusual for middle-aged men to get seriously ill. This sounds like a much better description of allegedly uninsurable homes: if there is a one in five chance of a flood, and a flood is going to cost £50,000, don’t expect to pay less than £10,000 a year for flood insurance.
But that’s unaffordable for a lot of people.
Yes, but unaffordability is not uninsurability. It’s insurable but expensive.
