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<p>This is mostly just regionally biased nonsense, but I’ll admit there’s a grain of truth to it based in demographics. SAT scores correlate positively with income and it’s generally true that in higher-income parts of the country—which would include most of New Jersey and Connecticut, most of Westchester County and parts of Long Island in New York, suburban Boston, suburban Philadelphia, suburban DC, parts of the LA area, and parts of the San Francisco Bay Area. But it would also include much of suburban Chicago, and suburban Minneapolis-St-Paul, and suburban Atlanta, and suburban Dallas, and suburban Houston, and suburban Denver, and suburban Seattle. Those areas will also have kids attending the best public and private schools, and engaging in the kinds of ECs that Ivies like. Now it may be that there’s a slightly higher concentration of those high-income areas and high-income households in the Northeast Corridor and coastal California, but I’m not even certain about that, because there are also huge areas of poverty in those places, and many more areas where incomes and schools are pretty middling. But any higher concentration is nowhere near the 6-to-1 ratio by which Northeasterners out-Ivy Midwesterners, Southerners, and Westerners (other than Californians).</p>
<p>We can do some pairwise comparison of states to get at this. Texas and New York are roughly similar in population; actually Texas is about 30% bigger now, but roughly similar numbers take the SAT, 166,000 in Texas and 163,000 in New York. Mean scores are almost identical, 981 CR+M in Texas and 984 in New York, Median scores are also similar: 50% median is 960 in TX and 980 in NY, and the 75th percentile median is 1120 in TX and 1140 in NY. Obviously even the 75th percentile is nowhere near Ivy-level in either state. New York does pull away a little in scores in the 700-800 range: 6,376 hit that mark in CR and 8,696 in M, compared to Texas’ 5,118 in CR and 6,998 in Math. So that’s just under 25% more scorers in the 700-800 range on each section in New York than in Texas, despite essentially identical numbers taking the SAT and pretty similar mean, 50th percentile, and 75th percentile scores. So that’s partial confirmation of your hypothesis, probably explainable by demographic factors–more kids in affluent families and attending better schools in New York, maybe as much as 25% more.</p>
<p>But it’s weak confirmation, and it doesn’t come close to explaining the fact that New York sent 2,534 kids to the Ivies in 2010, while Texas sent 473, or less than 1/5 the number. Here’s the biggest difference: In New York, 29,894 kids took 74,845 SAT Subject Tests. In Texas, 10,046 kids took 26,000 SAT Subject Tests. So, we have 25% more New Yorkers scoring in the 700-800 range in the SAT Reasoning Test, and 3 times as many New Yorkers taking SAT Subject Tests. Why? Well, generally you don’t take Subject Tests if you’re not planning to apply to a college that requires them. Like an Ivy.</p>
<p>And how did they do on those subject tests? Well, to take some of the more popular ones, on Lit, 515 New Yorkers and 303 Texans scored in the 750-800 range; more New Yorkers did extremely well, but as a percentage of those who took the test the Texans actually did slightly better (9.1% of Texans who took that test scored 750 or better, compared to 7.3% of New Yorkers). US History 1,770 New Yorkers and 660 Texans scored in the 750-800 range; proportionally, again the Texans did a little better (13.6% of New Yorkers and 16.7% of Texans scored 750+). Math Level 2, 3,165 New Yorkers and 2,063 Texans scored 750-800 (equal to 31.1% of New Yorkers and 36.3% of Texans who took the test). Physics, 734 New Yorkers and 372 Texans scored 750-800 (equal to 18.2% of New Yorkers and 18.3% of Texans). So there were definitely more New Yorkers in that top-stats pool, but mainly because so many fewer Texans elected to take SAT Subject Tests–because they had no intention of applying to Ivies or other elite schools that require subject tests. But even after that, if we say, “Fine, the Texans shot themselves in the foot by not taking the Subject tests, so more New Yorkers were in the Ivy-eligible pool”–well, it’s still less than twice as many New Yorkers as Texans in that pool; not 5 times as many.</p>
<p>We don’t know how many applied, but only 473 Texans enrolled in Ivies in 2010. We do know that 2,449 Texans sent SAT scores (Reasoning Test and/or subject Tests) to Harvard, the most popular Ivy among Texans. That’s fewer than the 2,909 who sent scores to Stanford, and the 7,837 who sent scores to Rice, and the 33,007 who sent scores to UT Austin. And not surprisingly, 80 Texans enrolled at Stanford (roughly as many as enrolled at Harvard, 81). And 85 enrolled at Duke; 99 enrolled at Emory; 104 enrolled at WUSTL;112 enrolled at Vanderbilt; 129 enrolled at USC; 444 Texans enrolled at Rice, and 6,409 enrolled at UT-Austin. Do you get the regional pattern?</p>
<p>And where did the New Yorkers go? Well, 1,034 went to Cornell, 324 to Penn (an hour by train away for many), 301 to Columbia, 202 to Harvard, 199 to Yale, 196 to Brown, 166 to Dartmouth, and (this surprised me a little) only 112 to Princeton–but that’s still more than any Ivy got out of Texas. Quite a few did stray as far south as Duke (154), Vanderbilt (131) and Emory (113); Rice not so much (28), Stanford only a little better (69, or about half the least-popular Ivy among New Yorkers).</p>
<p>This correlate pretty well with where the New Yorkers sent SAT scores: 3,440 to Brown, 3,673 to Penn, 5,635 to Columbia, and 8,703 to Cornell–all much bigger numbers than for Texas, where potential Ivy interest topped out at 2,449 who sent scores to Harvard. </p>
<p>As I said, it’s regional. Get it?</p>