Triple difference part 3: triple differences is a design, not a falsification

Case 2: Two Biased DiDs might equal an unbiased Triple Diff

Triple Differences is a Design, not a Falsification

Wednesdays are my “free content explainer” day, and I’m trying to stick to that. So today is my third entry in the “Triple Differences” series, and frankly, I think it’s kind of the most valuable one so far of the series.

Robert Frost once criticized writing poems that didn’t rhyme as like playing ten…