This readme accompanies the Gravity Modeling Environment (GME) package. Created by the Gravity Modeling Group at the United States International Trade Commission (USITC). Gravity Modeling Group: https://www.usitc.gov/data/gravity/experts.htm. Installation instructions and documentation are available at https://www.usitc.gov/data/gravity/gme_docs/ Also, see USITC's gravity portal at https://gravity.usitc.gov