There is just no evidence that Cornell places better than UCLA in LA (or probably in California) other than blind elitism and allegiance to arbitrary rankings. It doesn't matter whether the Cornell grad has ties to California or not.
Munger, Tolles, Olson is one of the elite firms in LA. 15 UCLA grads, 0 Cornell.http://www.irell.com/professionals.html?results
Irell & Manella is another elite LA firm. It has 26 UCLA grads, 1 Cornell.
The above indicates that even Cornell grads with ties to LA have a tough time breaking into the elite LA firms.
Los Angeles County has 5642 UCLA grads. 193 Cornell grads. About a 30:1 difference. That's more than self-selection, that is the benefit of the vast network and home town advantage that UCLA grads have and, in all likelihood, the preference employers have for UCLA grads. In all of California, there are 893 Cornell grads and 10872. The difference is less dramatic, but still 12:1 in favor of UCLA.
3. As stated by another poster, many firms in California neither do resume drops or OCI at Cornell, but most do OCI at UCLA. Even if a Cornell grad was at the top of his class, he wouldn't get his foot in the door of many Cali firms without some connections often times. According to NALP, 180 firms in California interview at UCLA, while 49 do at Cornell. 69 firms in LA interview at UCLA, 17 do the same at Cornell.
The above site tracks how many prestigious 9th circuit clerkships UCLA and Cornell grads have gotten in recent years. UCLA has easily outplaced Cornell on the west coast. The information gives you a rough sense of how federal judges, who actually make hiring decisions, view the relative quality of the law schools. As you can see, there are many T14 schools that perform well. Cornell is not one of them though. Moreover, federal judges don't usually care about students with local ties or home-town ties so you don't need account for that. Judges only hire what they feel are the best candidates.
5. UCLA's median GPA and LSAT are both higher than Cornell's. Why would a California hiring director prefer a non-local grad from 3000 miles away who, on paper, is not even academically more qualified than the local grad? Only a person who blindly follows minute differences in the US News rankings would do that. Fortunately, hiring directors aren't as gullible as prelaw students.
UCLA is not better in California than HYS, Berkeley and probably a few other schools, but it is not below Cornell.