There's also Green Card PERM Salary data available on sites like http://visadoor.com.
H1B's typically have less years of experience compared to Green Card applications, even through both their titles might say Senior Software Engineer for example. If you are researching salaries, I would definitely look into PERM Salaries as well.
Glassdoor groups all the salaries reported for a title over the years in one bucket. Hence, I find the PERM and Labor data very helpful because you can see how salaries have changed over years.
H1B's typically have less years of experience compared to Green Card applications, even through both their titles might say Senior Software Engineer for example. If you are researching salaries, I would definitely look into PERM Salaries as well.
Glassdoor groups all the salaries reported for a title over the years in one bucket. Hence, I find the PERM and Labor data very helpful because you can see how salaries have changed over years.
Eg. http://visadoor.com/companies/facebook-inc
http://visadoor.com/h1b/index?company=Facebook%2C+Inc.&year=...
http://visadoor.com/greencards/index?company=Facebook%2C+Inc...