Hysteresis is one of the main concepts used in Layard, Nickell and Jackman's book, Unemployment: Macroeconomic Performance and the Labour Market. Attempts to clarify the concept of hysteresis, from its formal representation to its empirical applications. Emphasizes the idea that hysteresis...

[eng] The analysis of National Income distribution is often restricted to that of the shares of wages and profits in value added, the main determinants of which are changes in productivity and real wages. This is because a study first focused on G.D.P, thus including all indirect taxes, then on...

The author discusses the effect of the mimetic contagion on the dynamics of stock prices. Each investor bids and/or asks prices such that adjusts to his present value, calculated from his incomplete information set, and to the average price of others buyers and sellers (mimetic contagion). An...

We present and discuss the padé z-transform method for the identification of a transfer function model; an application is given with the geometric lag model, the ratios of which can be real and/or complex numbers. The method consists first in considering the z-transform of the transfer function...