Viral Opinion A YouGov/Economist survey found that Democrats are much more likely than Republicans to be extremely concerned about the coronavirus. This started a twitter food fight over which party is dumber – the answer is they both are wrong. Affective polarization or negative feelings toward opposite political parties has been increasing in the U.S. more than in countries like the UK, Germany and Sweden. This enabled economists to study cross-country differences that might answer why. Levi Boxell, Matthew Gentzkow and Jesse Shapiro examined 40 years of data for nine wealthy, democratic countries (NBER Working Paper 26669) to answer why.  They found that often speculated reasons for polarization such as the internet, income...