Applied Economics Letters
Evidence from online assignments in an intermediate microeconomics course suggests that non-procrastinators (both early-starters and front-loaders) score higher than their dilly-dallying counterparts. Students who are busier in school tend to start their assignments earlier.
Caplan, Arthur J., and John Gilbert. (2008) "D is for Dillydally?" Applied Economics Letters, 15(14), 1085-1088.