Head, Ries, Swenson 1995, ‘Agglomeration benefits and location choice: Evidence from Japanese manufacturing investment in the United States’, Journal of International Economics, 38, pp. 223-247

KPMG 2015, Developing productivity elasticities for estimating WEBs in Australia–Scoping Study, March:

IA 2014, Reform And Investment Framework - Templates For Use By Proponents: Stage 7:

UK Department of Transport 2014, WebTAG unit A2-1 wider impacts:

UK Department of Transport 2009, Wider Impacts Sub – Objective, April:

UK Department of Transport 2006, Transport, Wider Economic Benefits and Impacts on GDP, June: