Rutgers political scientist Cliff Zukin estimates that landline-only phone surveys miss about 60% of eligible voters. Good pollsters try to compensate by sampling cellphone users, too. (Pew will sample 75% cellphones in 2016.) But that’s more complicated for several reasons: Federal law requires that pollsters dial cellphone numbers manually (no robo calls); people have cellphones registered in areas where they don’t live; and respondents with data plans that count minutes are often unwilling to stay on the phone for very long.
Zhang et al. Study Street-View Greenspace and Exercise
GPS-based street-view greenspace exposure and wearable assessed physical activity in a prospective cohort of US women Abstract Background Increasing evidence positively links greenspace and physical activity (PA). However, most studies use measures of greenspace, such...