Key points are not available for this paper at this time.
J. Bradford de Long, Andrei Shleifer, Lawrence H. Summers, Robert J. Waldmann, Positive Feedback Investment Strategies and Destabilizing Rational Speculation, The Journal of Finance, Vol. 45, No. 2 (Jun., 1990), pp. 379-395
Long et al. (Fri,) studied this question.