2000-10-16 The data were revised to change software-specific system missing
characters to blanks, and corresponding changes were made to the SAS
and SPSS data definition statements and the codebook.
2000-09-18 ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major statistical software formats as well as standard codebooks to accompany the data. In addition to these procedures, ICPSR performed the following processing steps for this data collection:
- Performed consistency checks.
- Checked for undocumented or out-of-range codes.
2011-11-02 All parts are being moved to restricted access and will be available only using the restricted access procedures.
2001-03-15 Additional documentation has been
added to the codebook by the principal investigator.
2001-03-15 Additional documentation has been added to the
codebook by the principal investigator.
2004-06-10 The principal investigator revised the replicate
weights so that they would more accurately reflect county
stratifications. The principal investigator also added a few variables
that (1) take inflation into account when calculating the damage
awards, and (2) better identify the trial cases. Corresponding changes
were made to the SAS and SPSS data definition statements and the