The Economics Department will have some new faces in key positions next year when Robert L. Moore, the head section leader of Economics 10, "Principles of Economics," and David G. Hartman, head Economics tutor, leave their posts at the end of this year.

Although Hartman has fulfilled his two-year position as head tutor of economics, he will continue teaching econometrics and international trade at Harvard. Donald Walls, a third-year graduate student and non-resident tutor at North House, will serve as head tutor for the next three years.

Moore will be leaving Harvard to become assistant professor of Economics at Occidental College in California. The move will fulfill Moore's dream of leaving the East to teach in "a more respectable part of the world," Moore said yesterday.

In his two years as head sectionman for Economics 10, Moore has concentrated on raising the quality of the course by making sure that teachers understand the dynamics of the classroom.

By compiling a 600-page instructor's manual, running teaching seminars, and taping the performance of every new section leader, Moore has tried to maintain teaching quality in the course.

Otto Eckstein, Warburg Professor of Economics, yesterday called Moore a "brilliant teacher and great role model," and said he was mystified by Moore's decision to leave.

"Robby Moore has been able to improve Ec 10 because of his extraordinary insight into the teaching situation," Eckstein said. "He knows how to evoke a positive response from students and how to make a classroom really successful," Eckstein added.

Although Eckstein said he briefly panicked when he heard that Moore was going to leave, he expressed confidence in Jeff Wolcowitz, a fourth-year graduate student in Economics, who has been chosen to replace Moore.

Since this year's student evaluations of Ec 10 were more favorable than they have ever been, Wolcowitz does not plan to make any great changes in his capacity as head of the course.