A LINEAR PROGRAMMING APPROACH TO SOLVING INFEASIBLE RAS PROBLEMS
讨论了区域间贸易表导致RAS方法不收敛的特殊性质，提出了两种线性规划方法来解决不可行RAS问题，并成功应用于调整美国区域间贸易数据。
ABSTRACT The RAS procedure is widely used to update national and regional input‐output tables and international trade tables and to construct regional tables from national ones. Special problems, however, have been encountered when the procedure is used to adjust interregional trade tables. In this paper, the special properties of interregional trade tables that increase the likelihood of nonconvergence of the RAS procedure are discussed, and two linear programming methods of solving infeasible RAS problems are provided. First, a closed linear programming approach, which enables exogenous information to override the purely mechanical solution of infeasible RAS problems, is presented. Finally, the open linear programming approach is applied successfully to adjust U.S. interregional trade data that had previously failed to converge using the RAS procedure.