Geiger, Hans-Michael Informational efficiency in speculative markets : a theoretical investigation Hans-Michael Greiger ; edited by Ehrentraud Graw - Bern Peter Lang 1989 - iv, 226 p. : ill. ; 21 cm Bibliography: p. 210-226 ISBN: 9783631408032 ISSN: 89159677 Subjects--Topical Terms: InvestmentsSpeculation Dewey Class. No.: 332.6 GEI