We calculated stock returnas the holding period return on a company’s stock from beginning to end of a calendar year. We also measured performance in terms of the mean composite analyst rating of the company’s stock in a given year. Analyst ratings can take one of five categorical values; we coded the data on these ratings, obtained from IBES, from 1, “strong buy,” to 5, “strong sell.” We reverse-coded the variableanalyst rating,soas to make the results more intuitive.
敢问高手：这段话中对绩效的衡量既不是ROA/ROE，又不是TQ,那么我应该怎么计算stock return？
非常感谢，请问 Industry
has been shown to impact firm performance (Rumelt, 1991), so to control for industry-level performance effects, we calculated the median performance values at the four-digit SIC code level for
both performance measures. The resulting variables are industry stock return这句话是什么意思，在这里面，industry stock return是研究中需要用的一个控制变量，那么这个控制变量我从哪里直接找到对应的数据？
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