I looked at the Harvard study. The author states: "Then, using ESPN's NFL depth charts, I aggregated each team's per game approximate value of what I considered to be the "Ccore" makeup of an NFL team: QB, RB, 2 WR, TE, Top 2 OL, the Top-4 Front "Seven" defensive players, and the Top-2 players from the secondary." So I went to the ESPN site and found the following: "2015 NFL Depth Charts for Fantasy Football" Updated Monday, July 20, 2015. These are fantasy specific depth charts and may not always match the "official NFL team depth charts." The charts are based upon last year's statistics. Thus what the Harvard study says is that the 13 positions evaluated had lousy fantasy figures last year or those positions (wide receiver, tight end and cornerback) are replaced this year with people who have no fantasy production from last year. Bottom line is that the study says we had lousy fantasy figures last year and have new players in some of the key positions with no fantasy track record from last year.