THE WEFA GROUP is formed by the merger of two of the nation's three largest econometrics services firms: Warton Econometric Forecasting Associates and Chase Econometrics. A pioneer in the development of microcomputer-based macroeconomic models, the group provides consulting services and acts as a data vendor for companies worldwide.DAVID J. GIANTURCO is a Business Analyst for the President's Support Group at Marine Midland Bank in Buffalo, New York.NARIMAN BEHRAVESH is a Senior Vice President of The WEFA Group.