Infrastructure, Externalities, and Economic Development: A Study of the Indian Manufacturing Industry

If infrastructure tends to generate spillover externalities,as has been the assumption in much of the development literature,one may reasonably look for evidence of such indirect effectsin the accounts of manufacturing industries. Empirical supportfor this assumption has so far been ambiguous. This analysisof Indian data, however, reveals substantial externality effectsfrom the states’ infrastructure to manufacturing productivity.The analysis separates the direct effects of roads and electricity,as mediated by the infrastructure services purchased by manufacturingindustries along with other intermediate inputs, from the indirecteffects, as measured by the impact of infrastructure capacityon the Solow productivity residual. In the 20 years from 1972to 1992, growth of road and electricity-generating capacityseems to have accounted for nearly half the growth of the productivityresidual of India’s registered manufacturing.