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

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Listed:
  • Kwasi Fosu, Augustin

    (UNU-WIDER)

  • Getachew, Yoseph Yilma

    (Durham Business School, Durham University)

  • Ziesemer, Thomas

    (UNU-MERIT, and Department of Economics, Maastricht UNiversity)

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.

Suggested Citation

  • Kwasi Fosu, Augustin & Getachew, Yoseph Yilma & Ziesemer, Thomas, 2011. "Optimal public investment, growth, and consumption: Evidence from African countries," MERIT Working Papers 2011-051, United Nations University - Maastricht Economic and Social Research Institute on Innovation and Technology (MERIT).
  • Handle: RePEc:unm:unumer:2011051
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    References listed on IDEAS

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    More about this item

    Keywords

    Public investment; Economic Growth; Nonlinearity;
    All these keywords.

    JEL classification:

    • H40 - Public Economics - - Publicly Provided Goods - - - General
    • O40 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - General
    • O47 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - Empirical Studies of Economic Growth; Aggregate Productivity; Cross-Country Output Convergence

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