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α: calibrated so average coauthorship-adjusted count equals average raw count
This article solves the equilibrium problem in a pure-exchange, continuous-time economy in which some agents face information costs or other types of frictions effectively preventing them from investing in the stock market. Under the assumption that the restricted agents have logarithmic utilities, a complete characterization of equilibrium prices and consumption/investment policies is provided. A simple calibration shows that the model can help resolve some of the empirical asset pricing puzzles. Article published by Oxford University Press on behalf of the Society for Financial Studies in its journal, The Review of Financial Studies.