标题：Forecasting with Input-Output Matrices: Are the Coefficients Stationary<BR>作者：John A. Sawyer <BR>连接：<A href="http://www.informaworld.com/smpp/content~content=a739145108~db=all~order=page">http://www.informaworld.com/smpp/content~content=a739145108~db=all~order=page</A><BR>期刊：Economic Systems Research, Volume 4, Issue 4 1992 , pages 325 - 348 <BR>