since the breakdown of the bretton woods system, exchange arrangements of countries have become flexible. several attempts have been made to determine whether the theories of optimum currency areas adequately explain the choice of an exchange rate system. in this paper, the optimum currency area is retested. using cross-section data, a regression analysis of the choice of an exchange rate syste...

Variable cross-section roll forming is a new process developed on the basis of traditional constant forming. It can produce variable products flexibly and efficiently, which great significance to automobile lightweight. In this paper, rolling section longitudinal beam simulated, finite element model sheet metal established in ABAQUS software, deformation stress distribution are analyzed. conclu...

Donald P. Green, Soo Yeon Kim, and David H. Yoon contribute to the literature on estimating pooled times-series cross-section models in international relations (IR). They argue that such models should be estimated with fixed effects when such effects are statistically necessary. While we obviously have no disagreement that sometimes fixed effects are appropriate, we show here that they are pern...