[malshe]

Where did you get 1.1 percentage point? The paper uses percentiles.

"Overall, we show that student test scores improved by 0.6 percentiles, with the ban increasing spring test scores 1.1 percentiles in the second year relative to the spring test right before the ban took effect. These positive test score effects are larger for male students (an effect of 1.4 percentiles on the spring test in the second year) and for students in middle and high schools (1.3 percentiles)."