Data Sharing Policies
NIH Data Sharing Policy. Effective October 1, 2003, all National Institutes of Health funded research (>$500K) must have a plan to address the sharing and archiving of data.
NSF Data Sharing Policy (pdf file, see article 36). The National Science Foundation "expects its awardees to share results of NSF-assisted research and education projects with others both within and outside the scientific and engineering research and education community."
National Human Research Protections Advisory Committee Recommendations on Public Use Data Files (pdf file).