Research on the effectiveness of R&D subsidy policies Research on the effectiveness of monetary policy in China Research on the effectiveness of supervisory board governance 并列题名：Research on the effectiveness of monetary policy in China Research on the synergy and effectiveness of service industry development policies Empirical study on the effectiveness of China monetary policy 并列题名：Research on the synergy and effectiveness of service industry development policies Empirical research on the effectiveness of police education Research on the effect of grain direct subsidy policy and its influence path