1. Transforming the twentieth century;Smil,2006
2. Competitive cities in the global economy;OECD,2006
3. Entrepreneurial culture: why European economies lag behind the U.S.;Phelps;Wall Street Journal,2007
4. Information technology and the recent productivity boom in the U.S.;Solow,2001
5. The automation of discovery;Glymour;Daedalus,2004