Scientists who share their data get a boost in citations, says a study (H. A. Piwowar and T. J. Vision PeerJ 1, e175; 2013). The authors examined citations of 10,555 papers on gene expression published between 2000 and 2009. Those for which the data were freely available received 9% more citations than those with restricted data. Reuse and citations of the open data continued to rise for six years after publication. Co-author Heather Piwowar, co-founder of open-metrics service ImpactStory in Carrboro, North Carolina, says that early-career researchers have good reason to share their data: “It will increase the impact of their research and that's good for their citation statistics and visibility.” Piwowar recommends that researchers store their data in well-known, easily accessible repositories.