" a lot of competitors with essentially same product and everyone instantly know all available into (so everyone buys cheapest of the same)." But we already kn

" a lot of competitors with essentially same product and everyone instantly know all available into (so everyone buys cheapest of the same)." But we already know these free markets are either not efficient or likely not efficient. Strong form efficiency is provably false. Weak form efficiency is only possibly true if P = NP (http://arxiv.org/abs/1002.2284 http://arxiv.org/abs/1002.2284).