Using calibration weighting in Web-based health surveys to combine probability and volunteer samples for studying small areas or low prevalence phenomena
Charles DiSogra, DrPH, MPH1, Curtiss L. Cobb, PhD2 and Elisa Chan, MS2
(1)GfK - Knowledge Networks, Palo Alto, CA, (2)GfK - Knowledge Networks, Palo Alto
(1)GfK - Knowledge Networks, Palo Alto, CA, (2)GfK - Knowledge Networks, Palo Alto