in u.s. public opinion before the 11 september have defined terrorism is a unpresidented events in thire countries. but true is since two centuries ago until now, especially after secound world war, united states extremly has experienced domestic and foreign terrorist groups and their attacks. wathever it wasn’t as well as scale of the other west countries like spain, italy and britain has incu...

The American “high school movement” of the early 20th century resulted in a dramatic rise in high school graduation rates, a trend that continued into the middle of the century interrupted only by World War II. Previous work has characterized the pre-World War II transformation of secondary education, but less attention has been focused on the continued increased in educational attainment after...

Jean Leray (November 7, 1906–November 10, 1998) was confined to an officers’ prison camp (“Oflag”) in Austria for the whole of World War II. There he took up algebraic topology, and the result was a spectacular flowering of highly original ideas, ideas which have, through the usual metamorphism of history, shaped the course of mathematics in the sixty years since then. Today we would divide his...

In this paper uses Kaname Akamatsu's 'Flying Geese' model to analyse Japan's role in East Asian integration. Japan made the first attempt to lead Asian countries before the Second World War. At that time, the Japanese Government embarked on a brutally expansionist policy the result of which was creation of the first gaggle of 'flying geese' under the name of the 'Greater East Asia CoProsperity ...

Similarly to his great predecessors P. L. Tschebyshev and A. M. Lyapunov, the academician A. N. Kolmogorov (25.04.1903– 20.10.1987) was not only a universal mathematician, proposing and developing fruitful ideas, he also readily answered challenges presented to him in his capacity as an applied mathematician. He had an amazing ability to get to the root of a problem, to determine fundamental is...

Does immigration accelerate sectoral change towards high-productivity sectors? This paper uses the mass displacement of ethnic Germans from Eastern Europe to West Germany after World War II as a natural experiment to study this question. A simple two-sector model of the economy, in which moving costs prevent the marginal product of labor to be equalized across sectors, predicts that immigration...

Does immigration accelerate sectoral change towards high-productivity sectors? This paper uses the mass displacement of ethnic Germans from Eastern Europe to West Germany after World War II as a natural experiment to study this question. A simple two-sector specific factors model, in which moving costs prevent the marginal product of labor to be equalized across sectors, predicts that immigrati...