Contestable markets and the theory of industry structure 2026-02-16T01:44:37+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Baumol, William J.; Panzar, John C., 1947-; Willig, Robert D., 1947- (Harcourt Brace Jovanovich, 1982)