The Signaling Value of a High School Diploma

Paco Martorell and Damon Clark
Additional contact information
Paco Martorell: RAND
Damon Clark: University of Florida, NBER, IZA

No 1248, Working Papers from Princeton University, Department of Economics, Industrial Relations Section.

Abstract: Although economists acknowledge that various indicators of educational attainment (e.g., highest grade completed, credentials earned) might serve as signals of a worker's productivity, the practical importance of education-based signaling is not clear. In this paper we estimate the signaling value of a high school diploma, the most commonly held credential in the U.S. To do so, we compare the earnings of workers that barely passed and barely failed high school exit exams, standardized tests that, in some states, students must pass to earn a high school diploma. Since these groups should, on average, look the same to firms (the only difference being that "barely passers" have a diploma while "barely failers" do not), this earnings comparison should identify the signaling value of the diploma. Using linked administrative data on earnings and education from two states that use high school exit exams (Florida and Texas), we estimate that a diploma has little effect on earnings. For both states, we can reject that individuals with a diploma earn eight percent more than otherwise-identical individuals without one; combining the state-specific estimates, we can reject signaling values larger than five or six percent. While these confidence intervals include economically important signaling values, they exclude both the raw earnings difference between workers with and without a diploma and the regression-adjusted estimates reported in the previous literature.

Keywords: education; productivity; earnings; income (search for similar items in EconPapers)
JEL-codes: D82 I21 J24 J31 (search for similar items in EconPapers)
Date: 2010-08
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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