Triple differences Part 1
Triple differences is greater than the sum of its two diff-in-diff parts




Gruber’s 1994 triple differences paper
The year 1994 is a special year for me both for sentimental and nerd reasons. It was the year I graduated from high school and the year I started college at the University of Tennessee Knoxville. The best of times and the worst of times, let’s just say. But it was also the year that Card and Krueger published thei…
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