The natural question is whether these heterogeneous expectations co-evolve into homogeneous rational-expectations beliefs, upholding the efficient-market theory, or whether richer individual and collective behavior emerges, upholding the traders’ viewpoint and explaining the empirical market phenomena mentioned above. We answer this not analytically—our model with its fully heterogeneous expectations it is too complicated to admit of analytical solutions—but computationally. To investigate price dynamics, investment strategies, and market statistics in our endogenous-expectations market, we perform carefully-controlled experiments within a computer-based market we have constructed, the SFI Artificial Stock Market
