The parallel and explosive growth in the 1970s of public policy papers presented at annual conferences of the American Political Science Association (from around 30 in 1970 to over 100 in 1980), and the founding in universities of separate departments and schools of public administration (from about 40 to more than 90 during the same decade) indicates this relationship. See Nicholas Henry, Public Administration and Public Affairs, 4th ed. (Englewood cliffs, NJ: Prentice - Hall, 1989), figure 10 - 1, p. 291.