RT Journal Article SR Electronic T1 Why Do We Inflate Grades? The Effect of Adjunct Faculty Employment on Instructor Grading Standards JF Journal of Human Resources JO J Hum Resour FD University of Wisconsin Press SP 0518-9493R2 DO 10.3368/jhr.56.3.0518-9493R2 A1 Kelly Chen A1 Zeynep Hansen A1 Scott Lowe YR 2019 UL http://jhr.uwpress.org/content/early/2019/10/07/jhr.56.3.0518-9493R2.abstract AB A burgeoning literature has documented the influence of adjunct instructors on student subsequent interest and success, but very little is known about its underlying mechanisms. This study investigates instructor choice of grading standards as one mediating channel by exploiting a unique university policy that converts full-time permanent lecturers from existing pool of part-time temporary instructors. We find that instructors hired on a temporary, part-time basis assign higher grades than their permanent full-time counterparts, with no discernible differences in student learning outcomes or perceived teaching effectiveness. The differential grading standards, however, appear to have a non-negligible impact on student enrollment patterns.