1. Is public expenditure productive?;Aschauer;J. Monetary Econ.,1989
2. Measuring the contribution of public infrastructure capital in Sweden;Berndt;Scand. J. Econ.,1992
3. Boarnet, M.G., 1996. The Direct and Indirect Economic Effects of Transportation Infrastructure. University of California Transportation Center, Berkeley, Working Paper No. 340.
4. Spillovers and locational effects of public infrastructure;Boarnet;J. Reg. Sci.,1998
5. Transport infrastructure and economic growth: evidence from Africa using dynamic panel estimates;Boopen;Empirical Econ. Lett.,2006