Study title

Topics: assigned contact type; incentivized and non-incentivized mail and phone groups; overall incentivized and non-incentivized groups; recruitment assignment groups; all members survivals in days, and in months; status (event active or attrited); mode of recruitment (mail or phone); total number of surveys assigned since being a member; total number of surveys completed since being a member; survey completion rate; average number of surveys assigned per month during their stay; average number of surveys completed per month; number of thank-you or retention cards sent during their stay; number of received birthday cards; number of received notepads in 2007 and 2008; number of received VT-books in 2008; magnetic calendar sent for 2007, for 2008, and for 2009; number of received Themes magazines; total number of retention cards, birthday cards, notepads, books, themes, and calendars; number of 3 strikes postcards; number of 3 strikes in 2007, in 2008, and in 2009; start and end date of membership. Demography: sex, age; education level; household income; race (recoded, 2 categories); Hispanic ethnicity; working status. Additionally coded was: respondent ID; case ID from the recruit survey to identify households; experimental conditions.