----------------- HES POSTING ----------------- Dear Marie, Phillip Toner has a book on cumulative causation, dealing with Allyn Young, Kaldor, Myrdal and others. Though he does not directly engage in mathmatical formulation, the book should be helpful for understand the concept historically. _Main currents in cumulative causation : the dynamics of growth and development_, Houndsmills, Basingstoke, Hampshire [England]: MacMillan Press; New York, N.Y. : St. Martin's Press, 1999. Masazumi Wakatabe Waseda University ------------ FOOTER TO HES POSTING ------------ For information, send the message "info HES" to [log in to unmask]