A Biproportional Filter to Compare Technical and Allocation Coefficient Variations
提出双比例过滤器，用于同时比较投入产出表中的列系数和行系数变化，挑战了传统比例过滤器分别比较的做法，并以法国1980和1993年投入产出表验证了列系数和行系数往往同时变化。
In input‐output analysis there are two alternate possibilities between Leontief's mechanism (fixed technical coefficients) and Ghosh's mechanism (fixed allocation coefficients). Testing the long‐term consistency of these mechanisms entails comparing input‐output matrices over time. This paper challenges the value of proportional filters (separate comparisons of column and row coefficients) and introduces the biproportional filter that allows simultaneous comparison of column and rows. An application is proposed using French input‐output tables for 1980 and 1993. The stability of column coefficients cannot be taken for granted and, generally, for any sector, both row and column coefficients are found to change simultaneously.