I estimate the total population size using 2014 ACS data (weight= PERWT) as 318,857,056 and using CPS-ASEC (selecting either HFLAG=0 or HFLAG= 1, weight=WTSUPP) as 318,857,056. I was wondering why they are not equal or at least similar? Do they have different reference dates?
Do not they need to sum up to Census Bureau population estimates for 2014?
Finally, is there a weight that I can use all sample from the CP0S-ASEC that sums up to total population? I am interested in migration not in income questions?
Thanks a lot,