When evaluating the impact of pollution, measurements from remote stations are often weighted by the inverse of distance raised to some nonnegative power (IDW). This is derived from Shepard's method of spatial interpolation (1968). The paper discusses the arbitrary character of the exponent of...

Two elements are being presented in this paper: (1) A new and original method for analyzing matrix dynamics, called the synthetical biproportional projector method (SBP), which can be used to project input-output tables and compare one with another. (2) Some results for France for the important...

The traditional dynamic Leontief model is synchronous: every vertex acts simultaneously. A model with delays of action has been proposed, but it still remains synchronous. In this paper the author proposes an asynchronous version of the model that allows realistic computations. He furnishes an...

A fixed input coefficient is traditionally interpreted as the additional input from one sector that is required for an additional unit of output in another sector. It is shown that this ratio of increments is, in general, not fixed under aggregation. A tight upper and lower bound for its...

The paper discusses qualitative input-output methods. It is shown that information is lost. Because the binary relation constructed by qualitative methods is not transitive, the model lacks economic consistency. Qualitative methods are tending to become more sophisticated, but some problems of...

The method of forecast output coincidence used to determine if sectors are demandsided or supply-sided in an input-output framework mixes two effects, the structural effect (choosing between demand and supply side models) and the effect of an exogenous factor (final demand or added-value). The...