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楼主: cmj_0702
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[经济学方法论] 谁知道heckman两步法的假设条件有哪些吗? |
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硕士生 55%
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回帖推荐The Heckman model also uses the followingassumptions: (ε,u)~ N(0,0,σ2ε, σ2u,ρεu) That is both error terms are normallydistributed with mean 0, variances as indicated and the error terms arecorrelated where ρεuindicates the correlation coefficient. (ε,u)is independent of X and Z The error terms are independent o ...
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