A look at M. G. Dagenais' contributions (1969, 1973) on threshold regression models and at chapter 9 of S.M. Goldfeld and R.E. Quandt's book (1972) concerning switching regression models suggested to me that a new approach to estimating the threshold model by introducing slack variables might be...

This paper is a critique of the neoclassical theory of investment behavior advanced by Jorgenson and others. The main conclusions are as following:

This paper is divided into three sections: a critique of certain post-keynesians U.S. economists is contained in the first section concerning their hypothesis of a fixed "markup" coefficient in the price-wages relation. Contrary to Kalecki who spontaneously admitted a flexible "markup" in a...