We show that a symmetric information Rational Expectations Equilibrium (REE) exists universally (and not generically), it is Pareto efficient and obviously incentive compatible. Agents, in a repeated economy framework, can reach a symmetric information REE (i.e., an efficient and incentive compatible equilibrium outcome) by observing the past asymmetric REE and also by updating their private information. We also prove the converse result, i.e., given a symmetric information REE, we can construct a sequence of approximate asymmetric REE allocations that converges to the symmetric information REE. The approximate REE can be interpreted as the mistakes that agents make due to bounded rationality, nonetheless, in the limit an exact symmetric information REE is reached. In view of the above results, the symmetric information REE provides a rationalization for the asymmetric one
