Studies of Welfare Populations: Data Collection and Research Issues. Endnotes

06/01/2002

1.  Because of problems with recall, often the individual cannot confirm his or her participation at a particular point in time (see Kalil et al., 1998).

2.  Our discussion of record linkage focuses on its application at the individual level, where research interests require individual-level linkage as opposed to aggregate population overlap statistics. In other words, we address the need to follow the outcome of interest at the individual level, focusing on research questions dealing with temporal data on timing and sequence. Utility of statistical techniques that are developed to estimate aggregate population overlap among different data sets without doing individual-level record linkage, such as the probabilistic population estimation method, is beyond the scope of our discussion in this paper. (For further information on such a technique, refer to Pandiani et al., 1998.)

3.  Presentation of the detailed mathematical process of probabilistic record linkage method is beyond the scope of this paper. Readers interested in the theory should refer to references cited in this section of the paper.

4.  Popular software programs such as SAS provide a simple method of converting names to Soundex codes.

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