I am conducting an analysis on long-run outcomes. The investigation we are conducting is relatively esoteric, so to increase our sample size, I was wondering whether it is okay to merge two different non-overlapping 5 year datasets (i.e. merge 2005-2009 with the 2010-2014 ACS).
I wanted to ask if this is statistically acceptable or justified (I guess the biggest concern would be with resampling the same household between two different 5 year periods, since the Bureau orders a household to be sampled only once in a five year period). Furthermore, how difficult or cumbersome would it be to standardize variables and what should we watch out for? Is this something that is recommended?