As a result of a contract awarded by the Construction Engineering Research Laboratory, U.S. Army Corps of Engineers, and the Environmental Pro tection Agency, a workshop on the methodology of economic impact analy sis was held at Hueston Woods State Park Lodge in Oxford, Ohio, April 13-15, 1977. Leading researchers in regional modeling were gathered to take stock of current developments in the field and to put forth new ideas and directions for research. Also attending the workshops were individuals from various governmental agencies that use regional models and economic impact statements. Preliminary versions of the papers appearing in this vol ume served as focal points for discussions that have hopefully continued, stimulating further thinking of the problems addressed. The objectives of the conference were not only to explore recent develop ments in methodology but also to expose users of economic impact analyses to a wide variety of models and applications and to acquaint academicians with the needs of users. The papers appearing in this volume represent only a portion of the output of this workshop.