This article considers the seemingly unrelated regression (SUR) model first analyzed by Zellner (1962). We describe estimators used in the basic model as well as recent extensions.

In recent years, there has been a growing interest in computer graphics and geometric modeling in the ability to create and manipulate Seemingly Impossible Models (SIMs). Methods to create derivative work and modify drawings and paintings of SIMs made by artists were suggested. Similarly, 3D realization of SIMs of some of these drawings were also offered. In this work, we further explore the na...

From the time of Bertrand Russell, the semantics of the English definite article has been the object of continued semantic analysis. Most analyses make some use of the notions of uniqueness, or familiarity, however defined more precisely (see for instance Roberts, 2003, for one recent analysis and review). In this paper, though, we wish to motivate through both experimental and non-experimental...