It is my privilege to introduce someone I have been friends with for more than 40 years. David Lipton and I met very close to the first day of graduate school. In those days we were both younger, thinner, and faster, and for a time, squash opponents. At one brief moment in graduate school, we were actually coauthors of a paper entitled “Multiple Shooting in the Solution of Rational Expectations Models.” And if anybody wants to know about the content of that paper, David probably remembers what it said.