[EM] 0-info approval voting, repeated polling, and adjusting priors

[Jobst Heitzig]

Dear Forest!

You wrote:
> At each successive stage we would base the new lottery calculation on a
> weighted average of all the old cutoffs.  In other words, the cutoff on
> each ballot is adjusted slightly towards the most recent lottery
> expected value before calculating the new lottery probabilities.

One must know the individual cardinal utility functions for this, it
seems. An alternative would be to switch from expected utility 0-info
strategy to median utility 0-info strategy (aka Weinstein's strategy) so
that only rankings would have to be known.

Jobst