PT - JOURNAL ARTICLE AU - Gultekin, N. Bulent AU - Rogalski, Richard J. TI - Duration: Response to critics AID - 10.3905/jpm.1989.409204 DP - 1989 Apr 30 TA - The Journal of Portfolio Management PG - 83--87 VI - 15 IP - 3 4099 - http://jpm.pm-research.com/content/15/3/83.short 4100 - http://jpm.pm-research.com/content/15/3/83.full