This paper explores the sources of agglomeration externalities in enhancing firm performance, in particular, the pecuniary externality that supports firms' bottom line. The fundamental argument on increasing returns leads to the premise that cluster size has beneficial influence to firm...

Using the statistical technique of fuzzy clustering, regimes of inflation and unemployment are explored for the United States, the United Kingdom and Germany between 1871 and 2009. We identify for each country three distinct regimes in inflation/unemployment space. There is considerable...