Political design data

The Republican National Committee has released a report on A/B testing on Donald Trump's campaign site with an eye to increasing donations. The changes are minor in each case but can produce significant effects (probably why they were selected for the report).

For an e-mail counterpoint, see Bloomberg's 2012 story on Obama's campaign e-mails. It lacks the rigorous data of the RNC report, but makes up for it with fun gems like this:

“We were so bad at predicting what would win that it only reinforced the need to constantly keep testing,” says Showalter. “Every time something really ugly won, it would shock me: giant-size fonts for links, plain-text links vs. pretty ‘Donate’ buttons. Eventually we got to thinking, ‘How could we make things even less attractive?’”