shirley-zhang 发表于 2020-5-9 12:55 
想请教一下,为您的数据中KZ指数和WW指数之间会显著负相关,理论上这正常嘛
同学,你好,两个指数侧重点不同,况且怎么会有显著负相关,我们做的论文中,稳健性检验效果一致啊,如果是负相关,稳健性检验时不就是反向了吗??我之前已经给您解释了啊,要不您看下以下顶刊的说明把,我都给你列出来了,
KZ指数(1.Lamont et al,2011 "financial constraints and stock returns "
2. KAPLAN AND ZINGALES,1997 "DO INVESTMENT-CASH FLOW SENSITIVITIES PROVIDE
USEFUL MEASURES OF FINANCING CONSTRAINTS")
ww指数(whited and wu,2006 “Financial Constraints Risk”)