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.
Kopp Opinion: Trump Is Attacking Climate Science. Scientists Are Fighting Back.
Trump Is Attacking Climate Science. Scientists Are Fighting Back. It’s easy, looking at the past year, to see the damage the administration has done. But researchers are also stepping up, trying to fill the gaps. For over 75 years, the United States has been a global...