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Dittmar, Jeremiah (2013) New media, firms, ideas, and growth: European cities after Gutenberg. National Bureau of Economic Research, Cambridge, USA.
Dittmar, Jeremiah E. (2011) Information technology and economic change: the impact of the printing press. The Quarterly Journal of Economics, 126 (3). pp. 1133-1172. ISSN 0033-5533
Gardner, Leigh (2008) To take or to make?: contracting for legitimacy in the emerging states of twelth century Britain. Discussion papers in economic and social history, 73. University of Oxford, Oxford, UK.
Klein, Alexander and Leunig, Tim (2013) Gibrat's Law and the British industrial revolution. SERC Discussion Papers, SERCDP0140. Spatial Economics Research Centre (SERC), London School of Economics and Political Science, London, UK.
Michaels, Guy and Rauch, Ferdinand (2013) Resetting the urban network: 117-2012. BREAD working papers, 405. Bureau for Research and Economic Analysis of Development (BREAD), Durham, USA.