It seems logical that more people would apply to jobs that include a salary in the post. I'd be far more interested to know what % of employers are satisfied with their hire if they included the salary or not. Additionally I'd want to know how many people they found were outright unqualified if they included the expected salary. My suspicion is that lots of [un|under]qualified people see a great salary and apply just hoping to luckily land the position. That's not say well-qualified people shun seeing the salary in a job post (as is obvious from the comments here) but how much signal:noise do companies get.