This episode's headline: Slowing Down; Turmoil in Pakistan; The Big Red Tractor. The guests include In New York: DAVID JONES, Economist; ALAN GREENSPAN, Economist; PAULA NEWBERG, Twentieth Century Fund; In Washington: JAMES MILLER, Budget Director; REPORTS FROM NEWSHOUR CORRESPONDENTS: JOANNE GARRETT (WHA), in Wisconsin. Byline: In New York: CHARLAYNE HUNTER-GAULT, Correspondent; In Washington: JIM LEHRER, Associate Editor