Adams, J. F., & Jenkins, P. H. (1962). The psychological marketplace. American Psychologist, 17(4), 208-209.
http://dx.doi.org/10.1037/h0043274
At a meeting of the Eastern Psychological Association "there were 206 applicants for 125 academic positions, 157 applicants for 467 clinical and counseling positions, and 163 applicants for 198 industrial and research positions." There are "more jobs available than there are psychologists to fill them in the total employment picture." While "the degree requirements are the lowest for the Industrial and Research area, the median starting salary is the highest. The converse is true for the academic positions." (PsycINFO Database Record (c) 2016 APA, all rights reserved)