Re: Tit for tat

Daniel Fabulich (
Wed, 15 Jul 1998 23:23:20 -0400 (EDT)

On Wed, 15 Jul 1998, Hugh Hixon wrote:

> I believe that your argument is considerably behind work on
> cooperative strategies. I recall reading that while tit-for-tat is
> the best strategy when surrounded by defectors, in a group consisting
> of all tit-for-tat, the best strategy is tit-for-three-tats
> (forgiveness).

I think you have the conditions wrong. While I, too, recall reading that Tit-for-X-Tats strategies would often compare favorably w/ TfT, sometimes even beating it, the point is moot when TfT is surrounded by TfXTs: they will all just cooperate all the time.

> The best strategy varies with the makeup of the
> group. There was a flurry of these papers about five (?) years ago,
> at least one of which appeared in *Science* or *Nature*.

I'll take a look. Any idea what the article was called? Some keyword I can search for?