 |
Saturday, Jul 5 |
|
| ||||
Over the past several years the PSID staff, using Computer Assisted Telephone Interview (CATI) technology and companion processing software, have significantly improved the quality and reliability of the timely release of data files. We now refer to the files as posted for each new wave as Public Release Data. Note that:
- Longitudinal data are subject to revision based on the most recent information received from individuals and families (i.e., family composition and economic editing) and as additional data are collected through time on our two year collection cycle, prior files may be edited in light of the new information. Both the values of the variables themselves and the relationships of individuals to the families to which they are connected may be edited. These are normally for a small number of cases.
- An extensive set of computed or generated variables are included in the Public Release Data. As time and resources allow we occasionally add selected new generated variables for later release.
Since the PSID data files, as with the data files from any complex longitudinal study, are subject to minor changes and subsequent updated releases, due primarily to economic and family composition editing activities, it is therefore highly recommended that users retain and save all data files that are downloaded from this site and upon which individual research analysis is dependent. Only the most current data files can be retained by PSID staff for distribution.
Institute for Social Research | University of Michigan | Privacy | Conditions of Use
