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Infrastructure and Growth in South Africa: Direct and Indirect Productivity Impacts of 19 Infrastructure Measures

  • Johannes Fedderke
  • Željko Bogetic

Empirical explorations of the growth and productivity impacts of infrastructure have been characterized by ambiguous (countervailing signs) results with little robustness. A number of explanations of the contradictory findings have been proposed. These range from the crowd-out of private by public sector investment, non-linearities generating the possibility of infrastructure overprovision, simultaneity between infrastructure provision and growth, and the possibility of multiple (hence indirect) channels of influence between infrastructure and productivity improvements. This paper explores these possibilities utilizing panel data for South Africa over the 1970-2000 period, and arrange of 19 infrastructure measures. Utilizing a number of alternative measures of productivity, the prevalence of ambiguous (countervailing signs) results, with little systematic pattern is also shown to hold for our dataset in estimations that include the infrastructure measures in simple growth frameworks. We demonstrate that controlling for potential endogeneity of infrastructure in estimation robustly eliminates virtually all evidence of ambiguous impacts of infrastructure, due for example to possible over investment in infrastructure. Indeed, controlling for the possibility of endogeneity in the infrastructure measures renders the impact of infrastructure capital not only positive, but of economically meaningful magnitudes. These findings are in variant between the direct impact of infrastructure on labour productivity, and the indirect impact of infrastructure on total factor productivity.

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Paper provided by Economic Research Southern Africa in its series Working Papers with number 39.

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Length: 48 pages
Date of creation: 2005
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Handle: RePEc:rza:wpaper:39
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