Notes

I do not know why, but IPUMS-USA does not provide the number of children under 18 in household; it only provides the number of own children of any age (NCHILD) and the number of own children age 4 and under residing with each individual (NCHLT5). However, for those of us who are interested in using IPUMS-USA data to estimate the labor market impact of parenthood, knowing the number of children under 18 in household may be useful. Here is the Stata code to accomplish that:

I am not sure how useful this information would be to the general public, but if you are interested in mapping variables to geographical borders of the United States Military Entrance Processing Command (MEPS), there seems to be no ready-made cartographic boundary files available to researchers. Here is the Stata code to convert Census FIPS county codes to match 65 MEPS in the U.S. and Puerto Rico: