从“大稳定”到“大衰退”:对美国经济周期的理论、历史和实证研究:theoretical,historical and empirical studies on american business cycle Theoretical and empirical studies on urban resilience Theoretical empirical studies on optimal reinsurance Theoretical and empirical studies on implementation of law Theoretical and empirical study on the power list system Theoretical analysis and empirical study on health insurance fraud theoretical and empirical research via Chinese tales Theoretical and empirical study on backpacker tourism