Assuming the validity of the endogeneity hypothesis of the Optimum Currency Area (OCA) theory, with the deepening integration of countries, where so far the highest stage in the EU is the economic and monetary union, the synchronization of business cycles should increase and the frequency of...

Recent production and consumption activities impose a heavy burden on the Earth's current and future capacity. Therefore, it is inevitable to deal with the impacts of the economic activities on the natural resources which determine our future well-being and the survival by itself. The indicators...