Theoretical and empirical studying on television programming differentiation 并列题名：Theoretical and empirical studying on television programming differentiation Theoretical and empirical study on evolution of industrial organization Theoretical and empirical study on cyclical company valuation theoretical and empirical study of the Pearl River Delta region Theoretical and empirical study on innovation-driven growth Theoretical and empirical study on relation of physical and environmental reproduction Theoretical and empirical study on the operation of urban public service in China Theoretical and empirical studies on implementation of law theoretical and empirical study based on Chinese market