Voici le reste du paragaphe. 10:41 Mar 28, 2011
Within the fusion program, donors and recipients were screened on the soft control variables (household income, household with children, merged age cells), with penalty scores computed for each donor-recipient pair. The household Income variable was given the highest weight of importance in the scoring. A perfect match on all the soft control variables implies zero penalties. Iteratively the fusion program searches for the solution that delivers the lowest overall penalty for the entire cell.
The finished fused database comprises 66,860 respondent records. In order to keep the file size at a manageable level, websites with less than 100,000 unique visitors were suppressed. As a result, 8,217 unique websites are included in the final dataset. |