I would agree with CAR, In L.A. there is a lot more work diversity, import/export is big, entertainment is big, some defense, some Bio-Tech and a lot or tourism etc… (Computer high Tech has really suffered in L.A. the last 12 years however).

Also Public workers generally get quite a bit more than they do in OC or SD and for better or worse that adds quite a bit to the local economies (also to L.A.’s budget problems especially down the road a few years from now).