Hi Juan Pablo, I was the E.D./P.I. at COACHE for a spell. The Faculty Job Satisfaction Survey is a massive analytical possibility w/institutionally-verified demographic + professional vars. The data request process isn't for the faint of heart, but worthwhile: coache.gse.harvard.edu/application-...
There is some slightly more useful salary data in CUPA-HR than in the fully public sources. CUPA-HR is not public or open to individuals but if your institution has a membership they can add you to it for no additional cost, though that can require some persuading.