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Description: Some universities are considered more prestigious than others. However, we do not have evidence that more prestigious universities use larger sample sizes than less prestigious universities. The purpose of this investigation is to explore the research practices of scholars in high versus low prestige universities in 2003-2004 and 2013-2014. Using data collected from over 1500 studies published in four of the top social psychology journals (i.e., Journal of Personality and Social Psychology, Personality and Social Psychology Bulletin, Journal of Experimental Social Psychology, Psychological Science), and data on the prestige of over 200 different universities, this study examines the link between university prestige and sample sizes over the course of a decade. Sample sizes were coded using the same method as Motyl et al. (2017). University prestige was estimated in three ways: (1) QS World University Rankings, (2) subjective ratings, and (3) each institution’s average number of citations per paper for psychology papers published between 2003 and 2014, as determined by Web of Science. Contrary to expectations, between 2003 and 2004, there was no difference in sample size, regardless of prestige. Sample sizes increased overall by 2013-2014, but increased more for high prestige universities than low prestige universities.