New Approaches to Confidentiality Protection

This document reports the results of research and analysis undertaken by the U.S. Census Bureau staff. It has undergone a Census Bureau review more limited in scope than that given to official Census Bureau publications. [This document is released to inform interested parties of ongoing research and to encourage discussion of work in progress.] and the Alfred P. Sloan Foundation. The views expressed herein are attributable only to the author(s) and do not represent the views of the U.S. Census Bureau, its program sponsors or data providers. Some or all of the data used in this paper are confidential data from the LEHD Program. The U.S. Census Bureau is preparing to support external researchers' use of these data; please contact U. Much of the paper is drawn from joint work and discussions with John Haltiwanger and Martha Stinson. We thank Fredrik Andersson and Simon Woodcock for helpful comments. All errors are our own.