The 1982 nominating committee of the New York Stock Exchange has selected four candidates for election to the exchange's board of directors. The candidates are Roger E. Birk, chairman and chief executive officer of Merrill Lynch & Co.; John Brademas, president of New York University; Bruce B. Dayton, former chairman of Dayton-Hudson Corp., and L. Edwin Smart, chairman, president and chief executive officer of Trans World Corp.

The committee also nominated six present members of the 22-member board for reelection. They are Fletcher L. Byrom, chairman and chief executive officer of Koppers Co. Inc.; John W. Fisher, chairman of Ball Corp.; George L. Shinn, chairman and chief executive officer of the First Boston Corp.; Donald Stone, senior partner with Lasker, Stone & Stern; Paul Hallingby Jr., general partner with Bear, Stearns & Co., and Justus C. Martin Jr., chairman of the Robinson-Humphrey Co. Inc.

The committee also recommended the following candidates for vacancies on the 1983 nominating committee: J. David Parkinson, chairman and chief executive officer of Thomas & Betts Corp.; Eleanor Sheldon, former president of the Social Science Research Council; Richard D. McFarland, president of the Inter-Regional Financial Group Inc.; Sanford I. Weill, chairman and chief executive officer of Shearson/American Express, and William F. May, dean of the New York University Graduate School of Business Administration.

The Federal National Mortgage Association recently announced a number of senior management appointments. Caryl S. Bernstein, senior vice president, general counsel and corporate secretary, has been named an executive vice president. Appointed senior vice presidents were John J. Meehan, vice president for finance and treasurer; Robert J. Mahn, vice president for mortgage operations, and F. G. Gosling, vice president for administration.

Fannie Mae also announced that Richard R. Betchley has been named to the new position of senior vice president of marketing and regional activities. Betchley was formerly manager of the southern California bond and money market division of Crocker National Bank.

In addition, John Timothy Howard has been named vice president and chief economist for Fannie Mae. He was formerly vice president and senior financial economist for Wells Fargo Bank NA.