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Weekend reading: Assessing probability

My weekend musings, plus the week’s links.

I have long maintained that it’s perfectly rational to buy a £1 lottery ticket if you want to.

This bemuses friends who know me as a bit of a money maven.

Don’t you realize, they ask, that you’re more likely to be hit by a meteor, while being watched by a bobby who is genuinely on the beat, on a sunny September day in usually ever-grey London?

Well, yes I realize the odds are insanely long. But the potential gain is absolutely ridiculously high, and the cost of playing is just £1.

And the real risk isn’t even the hard-to-quantify one that I will or won’t win, but the near-certain one that I will feel miserable for skipping the £1 ticket when I see the latest millionaire in the paper.

I’m not special in this – it’s what lotteries are founded on. “You’ve got to be in it to win it” the Australians say. It’s hope held hostage over expectation.

It helps that I rarely feel the need to play the lottery. I buy maybe ten tickets a year, and £10 isn’t much to assuage my worry of missing out.

I once worked out that the payout was better than with premium bonds [1], which also helps.

Academic backup

Happily, there’s also academic thinking that backs me up on this, as discussed in the Q&A of this archived TED talk:

It’s all good, but watch the Q&A for the case for playing the lottery.

From the blogs

Mainstream money stories

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