Say I have n random variables, {X0...Xn}, n>9
. I also have another set of random variables constructed from the first set, where each of these are the sum of 9 random variables in the original set, i.e.
{X0+X1...+X9, X0+X1...+X10, ...}
.
I can find a linear combination of random variables from the second set which satisfies some constraints; you can think of this as a game where you pick 9-variable combinations, and the solutions to the linear combination is the proportion of picks that would result in a Nash equilibrium.
Once I have that linear combination of sets, I can back out a distribution of usage of each variable from the first set; I.e. X0 is used in 80% of Nash equilibrium picks, X1 is used in 60%, etc.
My question: given the parameters of the distributions of each random variable in set 1, is it possible to find the post-Nash variable usage without first building all the permutations and computing the equilibrium distribution?