----------------- HES POSTING ----------------- [I post this alongside Robert's more complete bibliographic reference because it includes an additional reference to the article. -- RBE] The essay was originally published in "Essays in Honor of Oskar Lange," and is also found in her Collected Economic Papers, Vol. 3 Best of luck. John F. Henry California State University ------------ FOOTER TO HES POSTING ------------ For information, send the message "info HES" to [log in to unmask]