A year and a half after joining Kiplinger Washington Editors Inc. as publications vice president, Knight A. Kiplinger, 37, has succeeded his father, Austin H. Kiplinger, as editor-in-chief of Changing Times magazine, the company's 38-year-old flagship publication. Knight Kiplinger, a newspaper veteran, helped direct the recent graphic redesign of the personal money management magazine and launched a program to publish special issues. Although relinquishing his responsibilities as editor-in-chief, Austin will remain editorial chairman of both Changing Times and the Kiplinger Letters.

Charles R. Pucie Jr., Washington officer manager for the public relations firm of Doremus & Co. for the past five years, is the latest addition to the staff of Gray & Co. A former financial analyst at Chase Manhattan Bank, Pucie joins Gray as senior vice president.

Public Affairs Research and Communications Inc., a Georgetown public relations firm specializing in nonprofit public interest groups, has recruited veteran women's rights organizer Nancy Thompson as an account executive. Thompson, formerly press secretary for the National Organization for Women during its Equal Rights Amendment Countdown Campaign, will work with several national women's organizations.

Charles G. (Chip) Hardin, formerly assistant secretary of Transportation for governmental affairs and staff director for the Senate transportation appropriations subcommittee, has formed a governmental consulting and representation firm with offices in Washington and Annapolis.

Rosslyn-based Gannett Co. Inc. has tapped Thomas Curley, formerly president and publisher of the company's Bridgewater (N.J.) Courier-News, as assistant to the president of USA Today. Curley will be responsible for circulation operations. Michael J. Volpe, formerly a reporter for Knight-Ridder and a public affairs special assistant to former Labor secretary Raymond J. Donovan, has joined Gannett as director of public affairs.