Changes in Version 7.1-1 o Added note about PWT 8.0 being available in a separate package: pwt8. Changes in Version 7.1-0 o Added pwt7.1 data for PWT 7.1 released July 2012. Changes in Version 7.0-1 o Added empty NAMESPACE for R 2.14.0. Changes in Version 7.0-0 o Added pwt7.0 data for PWT 7.0 released May 2011. Changes in Version 6.3-1 o Use improved compression for data files. Changes in Version 6.3-0 o Added pwt6.3 data for PWT 6.3 released August 2009. Changes in Version 6.2-2 o Enhanced CITATION file.