Thanks very much for answering my question a few weeks ago regarding the availability of the METRO variable from the 2012 PUMS. Since the 2012 Metro variable won’t be available for several months, can we merge the 2012 ACS 1-year estimates that we download from Census with the Metro variable from 2011? In past years, the sort order of the two data files were the same so we could simply append the Metro variable onto the larger datafile without an ID. Will this method still work if we’re appending data from different years?
Thanks again for your help,