Abstract Stochastic frontier models and methods as pioneered by Peter Schmidt in Aigner et al. (J Econom 6:21–37, 1977), Horrace Product Anal 7:257–282, 1996), Amsler 190:280–288, 2016) constitute a rare departure from the usual econometric obsession with for conditional means. They also provided an early stimulus development of quantile regression methods. After brief tutorial on Hotelling tub...

In this paper we present a statistical approach for the detection of road signs present in an image by using only color related information. IndexTerms—Detection, road signs, directional T2 Hotelling, RGB, HSV

The pioneering model of electoral competition was developed by Harold Hotelling and Anthony Downs. The model developed by Hotelling and Downs and many subsequent models in the literature about electoral competition have assumed that candidates embody policies and, if a voter is not indifferent between the policies embodied by two candidates, then the voter’s choices are fully determined by his ...

The present paper studies the Hotelling-Downs and the Wittman-Roemer models of two-party competition when voter conformism is present and the policy space is uni-dimensional. We consider two types of voter conformism, bandwagon and underdog, and study their effects on political equilibrium of the two models. Even if voter conformism is present, the Hotelling-Downs parties propose an identical p...

Image quality can be defined objectively in terms of the performance of some "observer" (either a human or a mathematical model) for some task of practical interest. If the end user of the image will be a human, model observers are used to predict the task performance of the human, as measured by psychophysical studies, and hence to serve as the basis for optimization of image quality. In this ...