求助各位:刚刚接触工具变量的检验,对于输出结果还不是很懂,以下黄底是个人的理解,不知道对不对,请大家帮我看看工具变量选得可以吗?不胜感激!
识别不足检验:原假设是识别不足,Chi-sq(7) P-val = 0.0000,拒绝原假设,所以不存在识别不足。
弱工具性检验:Cragg-Donald Wald F statistic大于哪个值就算通过检验?
过渡识别检验:原假设认为工具变量有效, Chi-sq(6) P-val= 0.8140接受原假设,所以通过检验,是吗?
Underidentification test (Anderson canon. corr. LMstatistic): 294.979
Chi-sq(7) P-val = 0.0000
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Weak identification test (Cragg-Donald Wald F statistic): 37.609
Stock-Yogo weak ID test critical values: 5% maximal IV relative bias 17.70
10%maximal IV relative bias 10.22
20%maximal IV relative bias 6.20
30%maximal IV relative bias 4.73
10%maximal IV size 25.64
15% maximal IV size 14.31
20%maximal IV size 10.41
25%maximal IV size 8.39
Source: Stock-Yogo (2005). Reproduced by permission.
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Sargan statistic (overidentification test of allinstruments): 2.958
Chi-sq(6) P-val = 0.8140