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Optimal public investment, growth, and consumption: Evidence from African countries

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  • Augustin Kwasi Fosu
  • Yoseph Yilma Getachew
  • Thomas Ziesemer

Abstract

How much does public capital matter for economic growth? How large should it be? This paper attempts to answer these questions, taking the case of SSA countries. It develops and estimates a model that posits a nonlinear relationship between public investment and growth, to determine the growth-maximizing public investment GDP share. It empirically also accounts for the crowding-in and crowding-out effects between public and private investment, with equations estimated separately and simultaneously, using System GMM. The paper further runs simulation and examines the public investment GDP share that maximizes consumption. This is estimated to be between 8.4 percent and 11.0 percent. The results from estimating the growth model are in the middle of this range, which is larger than the observed value of 7.2 percent at the end of the sample period. These outcomes suggest that, on average, there has been public under-investment in Africa, contrary to previous findings.

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File URL: http://www.csae.ox.ac.uk/workingpapers/pdfs/csae-wps-2011-22.pdf
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Bibliographic Info

Paper provided by Centre for the Study of African Economies, University of Oxford in its series CSAE Working Paper Series with number 2011-22.

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Date of creation: 2011
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Handle: RePEc:csa:wpaper:2011-22

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Keywords: Public investment; Economic Growth; Nonlinearity;

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Citations

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Cited by:
  1. Ziesemer, Thomas, 2012. "Worker remittances and government behaviour in the receiving countries," MERIT Working Papers 065, United Nations University - Maastricht Economic and Social Research Institute on Innovation and Technology (MERIT).
  2. Issouf Samaké & Priscilla S. Muthoora & Bruno Versailles, 2013. "Fiscal Sustainability, Public Investment, and Growth in Natural Resource-Rich, Low-Income Countries: The Case of Cameroon," IMF Working Papers 13/144, International Monetary Fund.
  3. Ziesemer, Thomas, 2012. "Worker remittances and government behaviour in the receiving countries," MERIT Working Papers 065, United Nations University - Maastricht Economic and Social Research Institute on Innovation and Technology (MERIT).

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