Hello-- I'm reposting my previous question to provide more clarity. I'm new to ACS and am conducting analysis on percent employment by census tract. When I look at the API link for ACS 2010 5 year estimates, I don't understand the difference between data profile "DP03_0002PE" which indicates Percent Employment Status In labor force and data profile DP03_0011PE" which has exactly the same description. Could someone shed some light on this? I am specifically looking at 2010 ACS. Here is the link: api.census.gov/.../variables.html