An empirical study based on macroeconomic cycle an empirical study based on tone analysis an empirical study based on typical cases an empirical study based on Wuling mountain area an empirical study based on team learning theory an empirical study based on Chinese experience an empirical study based on the firms in China 宏观经济周期背景下融资约束对企业并购影响的实证研究:An empirical study based on macroeconomic cycle an empirical study based on data from 2008 to 2013 an empirical study based on China