The properties of Boolean methods of structural analysis are used to analyze the intern structure of linear or non linear models. Here they are studied on the particular example of qualitative methods of input-output analysis. First, it is shown that these methods generate informational problems...

France Telecom (FT), SFR and Bouygues Telecom (BT) have been fined by France’s Conseil de la Concurrence (CC) for organizing a mobile phone cartel with stable market shares (one-half, one-third and one-sixth respectively) and for directly exchanging commercial information. While not contesting...

The Ghosh model assumes that, in an input-output framework, each commodity is sold to each sector in fixed proportions. This model is strongly criticized because it seems implausible in the traditional input-output field. To answer to these critics, Dietzenbacher stresses that it can be...

This note indicates that the method of output coincidence for forecasts used to determine if sectors are demand-driven or supply-driven in an input-output framework mixes two effects, the structural effect (choosing between demand and supply driven models) and the effect of an exogenous factor...

The r and s vectors of the RAS method of updating matrices are presented often as corresponding to an absorption effect and a fabrication effect. Here, it is proved that these vectors are not identified, so their interpretation in terms of fabrication and absorption effect is incorrect and even...

The French government plans to authorize a fourth operator to enter the country’s mobile phone market alongside Orange, SFR and Bouygues Telecom. While the French government sees this as a way to foster competition, this paper predicts the move will prove a disappointment. Three points are...

The Supply-Use input-output model of the SNA and Eurostat is examined. For the product-by-product IO tables, two hypothesis are possible: “product technology”, largely adopted (Eurostat A) and examined here, and “industry technology” (Eurostat B). One examines the calculability of the...

Profit-rate maximization leads to use fewer factors —including labor— even if profits are high and it corresponds to shareholders’ financial behavior, by contrast to economic-profit maximization which corresponds to shareholders’ strategic behavior. This is shown in two steps. In part 1,...