Updated Judicial Common Space Scores

here. Courtesy of Profs. Lee Epstein, Andrew Martin, Jeff Segal, and Chad Westerland. JCS attempt to provide preference estimates for Supreme Court justices that are directly comparable to preference measures of Courts of Appeals judges, members of Congress, and the President. Our data extend through 2008 and correspond with the most recent version of Keith Poole's Common Space scores.

Comments

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I think the first version of Keith Poole's Common Space scores is good enough.

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Einer Elhauge is guest-blogging over at Volokh, and raising a bunch of interesting questions. One post draws a parallel between ELS and sabermetrics, leading one (clearly Boston-based) wag to ask, "if empirical legal studies are like sabermetrics, who is the legal equivalent of Joe Morgan?"

I'm not touching that one... But, in the spirit of the (baseball) season, I'd offer the following instead. Empirical researchers are taught early on to beware of selection bias -- drawing incorrect inferences from data which are nonrandomly sampled from a population. (An example would be concluding that early humans lived predominantly in caves, on the basis of finding paintings, remains of fire pits, and so forth there; because such artifacts are more likely to survive in caves than elsewhere, the available archaeological data are subject to selection bias). We also learn that there are ways of dealing with such data, including the class of "selection models" first developed by James Heckman.*

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What is Reserved System Space?
Can I delete the Reserved System Space and if so how? Or at the very
least reduce its size.