1. However, this picture also would change dramatically if one were to look at US states rather than the US. If a comparison were performed at that level of granularity, several US states, including the District of Columbia;2008, seven of the top ten performers were US states and three EU member states,2008
2. Competition and Innovation: An Inverted-U Relationship;P Aghion;Quarterly Journal of Economics,2005
3. Competition in Two-sided Markets;M Armstrong;RAND Journal of Economics,2006