Input-Output Analysis and Imports: Operations on Input-Output Tables

This paper discusses a theoretical hypothesis concerning imports and shows how it can be tested through operations performed on input-output tables. After presenting the structure of the tables used for Morocco and Algeria, the author examines the construction of a matrix of technical import coefficients and the algebraic treatment required for empirical estimation. The article clarifies the links between imported inputs, domestic production, and final demand, while also pointing to the limits of the proposed hypothesis and to the statistical conditions required for its use. It highlights the value of input-output analysis for studying import dependence and production interrelations.