Please note that some of these files have been compressed. You will need to decompress them with a program such as 7-Zip (open source,free) or Winzip before viewing them. Program 1 Merging all the data into a panel. Program 2 Merging files for a given wave into a cross-section. Program 3 Reshaping the birth history section and merging in the offspring questionnaires. Program 4 Reshaping of the mortality section to create a roster.