We model the evolution of regional asymmetries, and the associated intra-distribution mobility, as the outcome of adoption decisions taken by firms at different locations. We characterise the following equilibria: Persistent asymmetry where nobody adopts, Leapfrogging where low quality firms adopt, Forging ahead where high quality firms adopt, and Catching up where everybody adopts. We study th...

in all engineering applications where solid surfaces slide on each other, friction plays an important role. it becomes even more important, particularly in metal forming processes where the two sliding materials are metallic. among forming processes, forging is an important process, because of improving material structure, mechanical properties and reducing production time. an inverse analysis ...