Trackers and House Effects

10/31/2008 10:35 am ET | Updated May 25, 2011

An update on the house effects of the daily trackers. Here I'm also showing the effects of RV, LV or LV1 or LV2 for Gallup. For Hotline, the shift from RV to LV made little difference. But here you can see considerable difference for Gallup's LV1 (attitude only) and LV2 (traditional method) of identifying likely voters.

All data here are through 10/29.

The daily trackers combined into a single estimate follows quite closely with out trend estimate that also includes stand alone polls, as seen below. Note that the standard trend estimate DOES include the independent samples of trackers, while the trackers only estimate is for every release of the trackers, including overlapping samples.