Many comparisons of the performance of public and private producers use a public/private ownership dummy variable to capture cost differences in cross section data. This is appropriate if the producer choice is random. The dummy variable model is, however, logically inconsistent if the producer...

This paper analyses price fixing by the Joint Executive Committee railroad cartel from 1880 to 1886 and develops tests of two game-theoretic models of tacit collusion. The first model, due to Abreu, Pearce and Stacchetti (1986), predicts that price will switch across regimes according to a...

This paper considers smooth transition regression models and their univariate counterparts, smooth transition autoregressive models. The model is defined and thereafter, linearity testing, statistical inference in smooth transition models, and areas of application are discussed. A bivariate...

We focus in these paper on Granger shifts or structural breaks. We show that when the assumption of parameter constancy is violated, due to occurrence of structural breaks, Granger causality tests can provide misleading inference about the underlying relationship of causality. We consider a...

From the frequentist's standpoint, here is presented an iterative algorithm for estimating the unknown parameters of two-phase linear regression model with autocorrelated errors. The case in which a change point is unknown is considered. Applications of two-phase linear regression model are...