GMM Method

GMM Method

今天在检索GMM的时候发现Wooldrige大神在一个帖子下回复,深以为然。大神还顺带帮我们区分了method和model的不同,之前确实是瞎用一气。😂

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Log transform with O

Log transform with O

Variables log-transform is a common method to obtain the elasticities or a requirement such as estimating a Cobb-Douglas or translog form production function. However, when we encounter the zero-valued observation, what should we do? Because log(0) is undefined.

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