Nash, Stephen John. Cost, uncertainty, and welfare : Frank Knight's theory of imperfect competition / Stephen John Nash. - Aldershot, England : Ashgate, 1998. - viii, 205 p. : ill. ; 23 cm. Includes bibliographical references (p. 166-199) and index. ISBN: 1840145854 LCCN: 98-071967 Subjects--Personal Names: Knight, Frank Hyneman, 1885- Subjects--Topical Terms: Competition, Imperfect.