Robert B. Barsky and J. Bradford DeLong (1990), "Bull and Bear Markets in the Twentieth Century," Journal of Economic History 50: 2 (June), pp. 1-17.: Archive Entry From Brad DeLong's Webjournal
J. Bradford DeLong, Andrei Shleifer, Lawrence H. Summers, and Robert J. Waldmann (1990), "Noise Trader Risk in Financial Markets."

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