Halstead comments on Animal Equality showed that advocating for diet change works. But is it cost-effective? - Effective Altruism Forum

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Comment author: Halstead 11 June 2018 08:01:08AM 1 point [-]

Yes I was speaking somewhat loosely. It is nevertheless in my view very implausible that the intervention would sustain its effect for that long - we're talking about the effect of one video here. Do you think the chance of fade-out within a year is less than 10%? What is your median estimate?

Comment author: Flodorner 11 June 2018 08:55:19AM 0 points [-]

Are you talking about the individual level, or the mean? My estimate would be, that for the median individual, the effect will have faded out after at most 6 months. However, the mean might be influenced by the tails quite strongly.

Thinking about it for a bit longer, a mean effect of 12 years does seem quite implausible, though. In the limiting case, where only the tails matter, this would be equivalent to convincing around 25% of the initially influenced students to stop eating pork for the rest of their lives.

The upper bound for my 90% confidence interval for the mean seems to be around 3 years, while the lower bound is at 3 months. The probability mass within the interval is mostly centered to the left.