theoretical and empirical analysis 石油价格风险管理:方法与实证:methodology and empirical analysis Firm-level trade theory and empirical analysis 并列题名:Firm-level trade theory and empirical analysis theoretical mechanism and empirical analysis methodology and practice 科技金融:theoretical and empirical analysis:理论与实证分析 国际短期资本流动监管:理论与实证:theory and empirical analysis Methodology for population information analysis 可再生能源系统风险管理:方法与实证:methods and empirical analysis