Please note: There is an incorrect link in this article referencing a quarterly report. The corrected link is below.
"CRSP used percentage of market cap while MSCI uses numbers of securities to decide their cuts between mega-, large-, mid- and small-cap stocks. The CRSP percentages need to be converted to actual numbers of securities to do an apples-to-apples comparison. Luckily, CRSP has done this in a CRSP quarterly report dated March 2, 2012."
