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In order to safeguard the confidentiality of respondents at the highest level, some data are provided only under conditions of a restricted use contract between the researcher and the University of Michigan.

Process and requirements for obtaining restricted data

Active contract holders: requirements

Frequently Asked Questions
	Obtaining the data
	Existing contract holders


Main Study Geographic Information Census Tract, Block-Group, and Block File Description Codebook County Level Identifiers File Description Variable list County Born/Grew Up: Head, Spouse/Partner, & Parents File Description Codebook Childbirth and Adoption History - County Born: Child File Description Codebook Administrative Linkages School Identifiers File Description Codebook Mortality File Description Codebook User Guide Assisted Housing File Description Codebook Medicare Claims File Description Asian Ethnicity Head and Spouse/Partner File Description Codebook Childbirth and Adoption History: Child File Description Codebook Vehicle Make and Model File Description Codebook		Supplemental Studies Child Development Supplement School Identifiers File Description Codebook CDS I-II Time Diary Media Codes File Description Codebook CDS-I CDS-II Transition into Adulthood Supplement School Identifiers File Description Codebook 2007 Hurricane Katrina Supplement File Description 2013 Family Rosters and Transfers Child's Month and Year of Birth File Description Codebook Place and Distance Codes File Description Codebook Distance Codes File Description Codebook 2014 Childhood Retrospective Circumstances Study File Description Codebook