The purpose of this paper is to develop a testable theory, the interaction thesis, capable of explaining why do we observe differences in economic stability and growth rates between various countries; or - the same thing - why less efficient countries do not duplicate economic policies of more...

In the age of migration, many developed countries face an increasing heterogeneity of their residents. Migrant flows often lead to political discussion about the impact of migrants on labour markets, economic growth, and urban agglomeration processes, and consequently many of these causalities...