The results of analyzing experimental data using a parametric approach may heavily depend on the chosen model. With this paper we describe computational tools in Splus for a simultaneous selection of parametric regression and variance models from a relatively rich model class and of Box-Cox...

This paper extends previous work in Escribano and Jorda (1997) and introduces new LM specification procedures to choose between Logistic and Exponential Smooth Transition Regression (STR) Models. These procedures are simpler, consistent and more powerful than those previously available in the...

This paper develops an alternative asymptotic approach to Staiger-Stock's (1997) local to zero IV estimation of a structural parameter when instruments are weakly related to the endogenous variables. Rather than treating the limiting coefficients of the instruments in the first-stage regression...

A geometrical interpretation of multiple regression is proposed. The method is explained within the context of the tourism industry by developing a model for the management of hotels. The paper first explains the technique in non-mathematical terms and is completed with the mathematical proof of...