2.3 [Related to the Economics in Practice on p. 487] In 1991, economists Joshua D. Angrist and Alan B. Krueger published a study on the correlation between date of birth and years of schooling. The premise was that the actual amount of time an average person spends in school is tied to the time of year in which people are born. Suppose in the city of Gotham, school is mandatory for all children, and students must be six years old by August 31 in order to enter first grade. By law, students must stay in school until they are 16 years old, at which time they can drop out if they choose. How would you use regression discontinuity to evaluate if a person’s date of birth correlates to the years of schooling the person attains in Gotham?