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请问表中的IV 统计可以用stata ivregress得出吗?那instrumental variable是哪个呢?文字叙述里的2-step GMM estimator 指的是industry sector?能指点下如何写表中的IV estimation regression 的指令么?
ivregress estimator depvar [varlist1] (varlist2 = varlist_iv) [if] [in] [weight] [, options]
表上的文字可能看不清,如下:
This table reports OLS and Instrumental Variable (IV) estimation results from investment regressions. Regressions
include industry-fixed effects. The data are from the U.S. sample, first quarter of 2009. Refer to Table 2 for detailed
variable definitions. Test-statistics reported in parentheses are based on heteroskedasticity-consistent standard errors
adjusted for clustering across observations of a given industry using the 2-Step GMM estimator. The table also reports
diagnostic statistics for instruments’ overidentification (Hansen’s J-stat p-val. reported) and first-stage F-test of excluded
instruments (lowest p-val. reported).
自变量是竖排的 cash holdings lcs casholdings*lcs large public firms investmentgrade unconstrainedcredit
变量 有 3个,是头顶横行的 Plannedinvestment Planedtechspending planedemployment
IV 变量是 industry?




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