作者
Chunrong Ai, Edward C Norton
发表日期
2000/9/1
期刊
Journal of health economics
卷号
19
期号
5
页码范围
697-718
出版商
North-Holland
简介
Economists often estimate models with a log-transformed dependent variable. The results from the log-transformed model are often retransformed back to the unlogged scale. Other studies have shown how to obtain consistent estimates on the original scale but have not provided variance equations for those estimates. In this paper, we derive the variance for three estimates — the conditional mean of y, the slope of y, and the average slope of y — on the retransformed scale. We then illustrate our proposed procedures with skewed health expenditure data from a sample of Medicaid eligible patients with severe mental illness.
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