Summary statistics.
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下载链接：
https://figshare.com/articles/dataset/Summary_statistics_/6117347
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资源简介：
The book price refers to the maximum price aggregated over all formats. Investment is an ordinal metric where 0 indicates ebook, 1 indicates mass market paperback, 2 indicates trade paperback, and 3 indicates hardcover. The rest of the variables are binary.
创建时间：
2018-04-09
