/*
   -append-
   
    Each data file contains demographic data for all the counties in each state,
	  MD, DC, and VA.  
*/

/* Describe the individual datasets */
foreach fname in md dc va {
   desc using `fname'
}

/* Append the three data files */
use md, clear
append using dc va, gen(datafile)
label variable datafile "Data file contributing appended data"

/* Examine the append outcome */
desc
tab datafile  /*0=MD, 1=DC, & 2=VA */

/* Save the file */
save merged-md-dc-va, replace