The EcoWillow economic model was developed by the State University of New York, College of Environmental Sciences and Forestry (SUNY – ESF) and was released in spring 2008. It is based on over 20 years of research on shrub willow for wood chip production in Upstate New York. For details and common management and production assumptions upon which the model is based, please refer to the Willow Biomass Producer's Handbook which can be downloaded at http://www.esf.edu/willow/. The model as well as a fact sheet describing the scope and functioning of the economic model can be downloaded on this website. Support for the development of the model was provided by NYSERDA, USDA CSREES, NY Department of Agriculture and Markets.