In this article is studied hypothesis, that every period (time interval) before financial crisis is distinguished by co-movement of several variables. The study is based on monthly data (that means no quarterly data, like portfolio investment, were used). This hypothesis, tested with vector...

The authors contend that the theory of optimum currency areas (OCA) provides a useful framework for discussions of monetary integration. The authors summarize the historical development of monetary integration and discuss possible future development. Theoretical issues, such as those raised in...