Theory and empirical research on frontier issues of asset allocation 并列题名：Theory and empirical research on frontier issues of asset allocation Theoretical and empirical research on regional innovation model selection Theory and empirical research on industrial cluster Theoretical and empirical research on intergroup relation theoretical and empirical research of frontier minority areas Theoretical and empirical research on tht city residential customer satisfaction Theory and empirical research of the technology alliance innovation system Theoretical and empirical research on rural revitalization theory and empirical research based on Chinese enterprise