<p>If we went just on selectivity---the direction some anti-PA folks on CC seem to be headed---the top LACs would look like this:</p>
<p>Rank by selectivity/college/current US News rank/difference/[PA score]</p>
<ol>
<li>Harvey Mudd (15) +15 [4.1]</li>
<li>Williams (1) -1 [4.7]</li>
<li>Pomona (7) +4 [4.2]</li>
<li>Amherst (2) -2 [4.7]</li>
<li>Haverford (10) (+5) [4.1]</li>
<li>(tie) Swarthmore (3) -3 [4.6]</li>
<li>(tie) CMC (11) +5 [4.0]</li>
<li>Bowdoin 7 (-1) [4.3]</li>
<li>(tie) Wellesley (4) -5 [4.5]</li>
<li>(tie) Barnard (30) +21 [3.9]</li>
<li>(tie) Middlebury (5) -4 [4.2]</li>
<li>Washington & Lee (15) +3 [3.9]</li>
<li>Carleton (5) -8 [4.4]</li>
<li>Davidson (9) -5 [4.2]</li>
<li>(tie) Wesleyan (11) -4 [4.2]</li>
<li>(tie) Hamilton (17) +2 [3.7]</li>
<li>(tie) Vassar (11) -6 [4.1]</li>
<li>(tie) Oberlin (20) +3 [4.2]</li>
<li>(tie) Scripps (28) +11 [3.7]</li>
<li>Colgate (17) -3 [4.0]</li>
<li>Bucknell (30) +9 [3.8]</li>
<li>(tie) Colby (22) no change [4.0]</li>
<li>(tie) Macalester (26) +4 [4.1]</li>
<li>(tie) Grinnell (11) -13 [4.3]</li>
<li>(tie) Colorado College (26) +2 [3.8]</li>
<li>(tie) Bates (24) -2 [4.0]</li>
<li>(tie) Bard (37) +11 [3.4]</li>
<li>(tie) Lafayette (34) +6 [3.4]</li>
<li>(tie) Gettysburg (48) +20 [3.3]</li>
<li>(tie) Kenyon (32) +2 [3.8]</li>
<li>(tie) Reed (54) +24 [3.9]</li>
<li>(tie) Holy Cross (33) +3 [3.6]</li>
<li>(tie) Bryn Mawr (24) -9 [4.1]</li>
<li>(tie) Whitman (37) +4 [3.3]</li>
<li>(tie) Centre College (44) +11 [3.4]</li>
<li>(tie) Occidental (36) +3 [3.7]</li>
<li>Furman (37) no change [3.5]</li>
<li>US Naval Academy (20) -17 [4.0]</li>
<li>Wheaton (IL) (59) +22 [3.2]</li>
<li>Union (40) no change [3.3]</li>
<li>Trinity (34) -7 [3.6]</li>
<li>Franklin & Marshall (40) -1 [3.5]</li>
<li>Dickinson (44) -1 [3.4]</li>
<li>Rhodes (49) +6 [3.5]</li>
<li>Smith (17) -29 [4.3]</li>
<li>Denison (52) +6 [3.4]</li>
<li>Wheaton (MA) (56) +10 [3.3]</li>
<li>Illinois Wesleyan (59) +13 [3.1]</li>
<li>Wofford (59) +13 [2.9]</li>
</ol>
<p>Falling out of top 50:
52. (tie) Mount Holyoke (28) -24 [4.0]
52. (tie) University of Richmond (40) -12 [3.6]
55. Connecticut College (44) -11 [3.5]
57. (tie) US Military Academy (22) -35 [4.0]
57. (tie) Skidmore (47) -10 [3.4]
63. (tie) Pitzer (49 tie) -14 [3.5]
63. (tie) DePauw (49 tie) -14 [3.4]
77. Sewanee-University of the South (40) -37 [3.6]</p>
<p>Biggest gainers: Reed +24, Wheaton (IL) +22, Barnard +21, Gettyburg +20, Harvey Mudd +15, Illinois Wesleyan +13, Wofford +13, Scripps +11, Bard +11, Centre College +11, Wheaton (MA) +10, Bucknell +9</p>
<p>Biggest losers: Sewanee-University of the South -37, US Military Academy -35, Smith -29, Mount Holyoke -24, US Naval Academy -17, Pitzer -14, DePauw -14, Grinnell -13, University of Richmond -12, Connecticut College -11, Skidmore -10, Bryn Mawr -9, Carleton -8</p>
<p>Frankly I don't see much evidence that PA scores are responsible for a lot of "overrating" or "underrating" of schools by US News relative to their selectivity. Indeed, selectivity correlates quite strongly with PA rating. With only a couple of exceptions, the 25 most selective LACs all have PA ratings ranging from 3.9 to 4.7, with the higher scores generally clustered toward the top of that group. The next dozen or so in selectivity are generally in the 3.5-4.0 range in PA. And the next dozen after that are generally in the 3.1 to 3.7 range. </p>
<p>With a small handful of notable exceptions---Smith, Mount Holyoke, and Grinnell, which clearly are kept aloft in the current U.S. News rankings at least in part by high PA scores-- the schools that fall the farthest when measured strictly by selectivity tend to be schools with middling PA scores; they're kept up in the current US News rankings by financial factors which don't translate into selectivity or prestige among their academic peers. For example, Sewanee-University of the South, which ranks #40 among LACs in the current US News but an astonishing 37 places lower in selectivity, makes the top 50 mainly because it ranks a very strong 15th in "faculty resources." Pitzer barely cracks the top 50 (#49) largely on the strength of its "financial resources" which rank 31st among LACs, even though it's 63rd in selectivity and a so-so 3.5 in PA.</p>
<p>On the other side of the equation, many of the "biggest gainers" are schools that are not only highly selective but also have relatively high PA scores. Reed, for example, rockets from 54 on the current US News ranking to 30 measured strictly by selectivity. It's hurt in US News not by its 3.9 PA score (very strong), but by its low graduation rate (75%) and weakness in faculty resources (#74) and financial resources (#181). Wheaton (IL) may be held down a little by its 3.2 PA rating, but probably more so by its faculty resources (#167) and financial resources (#79) rankings. Barnard, as it turns out, is among the top 10 LACs in selectivity, but it's held down in US News not by its strong 3.9 PA rating but by faculty resources (#103) and financial resources (#75), which drag it down into the #30 spot. </p>
<p>Finally, nothwithstanding xiggi's blanket assertions about women's colleges, I'd note that while Smith and Mount Holyoke are indeed among the "biggest losers" if you take out PA and rank schools solely by selectivity, two other women's colleges, Barnard and Scripps, are among the "biggest gainers," and Wellesley and Barnard both rank among the 10 most selective LACs in the country.</p>