Mara, I may be misunderstanding what you're after, but... You could apply the distributions in QT-P13 to make proportionate reductions to your detailed age data (e.g., P12). From my cursory review of the data from the Baltimore metro area, it appears that less than 2% of all blocks in the five-county area include group quarters. Fewer than half of those blocks have group quarters populations greater than 10. And, in total, less than 2% of the Baltimore metro area population lives in group quarters. That is to say, your choice of estimation technique may not matter all that much. Travis M. Brooks Assistant MPO Planner Jonesboro Metropolitan Planning Organization Direct: (870) 336-7265 Internal Extension: 1272 From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of mkaminowitz(a)baltometro.org Sent: Wednesday, August 29, 2012 3:16 PM To: ctpp-news(a)chrispy.net Subject: [CTPP] detailed age (block level) for population in quarters I have a request for detailed 2010 age data by block for the population in households (aka excluding group quarters). This data is available in SF1 and SF2 at the tract level but not block. It has to be blocks because I need to aggregate up to TAZ, and our TAZ's split tract and block group boundaries. Has anyone come across this data or found a way of estimating it? Group quarters also does not have detailed age groups so we can't just subtract. Mara Mara Kaminowitz, GISP GIS Analyst ......................................................................... Baltimore Metropolitan Council Offices at McHenry Row 1500 Whetstone Way Suite 300 Baltimore, MD 21230 410-732-0500 ext. 1030 mkaminowitz(a)baltometro.org<mailto:mkaminowitz(a)baltometro.org> www.baltometro.org <http://www.baltometro.org/> ________________________________ Confidentiality Statement This message may contain legally privileged and confidential information that is intended only for the use of the recipient(s) named above. If you are not an intended recipient, taking any action based on the contents of this message is strictly prohibited. Please immediately notify the sender if you have received this message in error.