Equilibrium sample size, basic model behavior illustrated with d = 0.5, IF = 200.

A) Illustrative income (blue, green for b = 0.2, 0.5, respectively) and cost (black) function with increasing sample size (s); MU: monetary units where one MU buys one sample B) Profit functions for b = (0, 0.1,…, 1). For any given b the (ESS) is the sample size at which profit is maximal. C) Relation of the ESS to b (black curve). Respective ESS for b = 0.2 and 0.5 are indicated by blue and green lines. D) Statistical power of the ESS (P(ESS)) for the given d and IF. E) Expected distribution of statistical power at ESS if b is uniformly distributed.