... the United Kingdomof data from 19 92, September 16 , 19 92 would stand out because for one day interest rates went up from 10 to 12 % (and were announced to go up to 15 %) as the government attempted ... yit(see, for example, Imbens andAngrist 19 94; Angrist 2004). 41 Milyo and Waldfogel (19 99), for example, collected data on prices from liquorstores near the border of the two states Rhode Island ... Heckman and Vytlacil (2005). 10 4 2. Econometrics Reviewestimates of such a two-stage process provides exactly the 2SLS estimator. To seewhy, notice that by constructionOX 1 and (X 1 OX 1 )...