We demonstrate the existence of chaos in realistic models of two-field inflation. The chaotic motion takes place after the end of inflation, when the fields are free to oscillate and their motion is only lightly damped by the expansion of the universe. We then investigate whether the presence of chaos affects the predictions of two-field models, and show that chaos enhances the production of to...

Over the past years, the relationship between foreign trade and economic growth has been the debate of economic research in academe. On this issue, economists at home and abroad used the relative data of china and got different conclusions by different methods. At first, this thesis reviews the theories of the relationship between foreign trade and economic growth, and then sum up the main argu...

Anthony J. Venables LSE and CEPR . Abstract: Growth and development typically involve the creation of new economic activities. New productive sectors develop, and old activities come to be performed in radically different ways. Evidence from both economic history and economic development suggest that this process of structural change is central to increasing growth and raising standards of livi...

Combining the theories of politics of scale from political geography, security theory from international relations, and energy security theory, and putting the scale conversion of energy contention, geographical relationship and geo-structure in geo-setting, and the three properties of safety in consideration, this paper rebuilds a geo-energy security evaluation model and uses the model to quan...