Estimating Log Models: To Transform or Not to Transform?
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Data on health care expenditures, length of stay, utilization of health services, consumption of unhealthy commodities, etc. are typically characterized by: (a) nonnegative outcomes; (b) nontrivial fractions of zero outcomes in the population (and sample); and (c) positively-skewed distributions of
提供机构：
美国国家经济研究局创建时间：
1999-11-01
