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Analysis of public investments and economic growth in Cameroon

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Abstract

This study investigates the contribution of public investment to economic growth in Cameroon from 1977 to 2015. It uses the Autoregressive Distributed Lag cointegration (ARDL) approach to estimate a modified version of the production function. The estimates indicate that real gross domestic product, labor force, public investment and private investment are cointegrated. Also based on the estimates, public and private investments have positive and significant effects on real gross domestic product in both the short-run and the long-run. The estimates further show that labor force has a significant long-run relationship with real gross domestic product but found no evidence of a significant short-run relationship. The error correction term is negative and significant suggesting that any deviations of real GDP growth from the long-term value would be corrected subsequently.

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Notes

  1. The overall quality of infrastructure is based on the yearly Global Competitive Report by the World Economic Forum surveys business leaders in their respective countries (IMF 2015). Thus, the quality of infrastructure is an index used in ranking countries based on the quality of ports, roads, air transport, electricity, and telecommunication infrastructure.

  2. The non-standard F-test was developed for small samples by Pesaran et al. (2001) and modified by Narayan (2004).

  3. The absence of reliable data on labor force participation in Cameroon is problematic especially as the rate of unemployment is quite high.

  4. The maximum lag of 9 was determined based on the suggestion by Ng and Perron (1995) which sets an upper bound P max for P. Following this approach, the absolute value of the t-statistic for testing the significance of the last lagged difference should be greater than 1.6 so that P is set to be equal to Pmax. If this not the case, the procedure consists of reducing lag length by one and of repeating the process.

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Correspondence to Augustin Ntembe.

Appendices

Appendix 1

Table 7 Cameroon: real GDP, labor force, public investment, private investment (millions of dollars, and labor in thousands), 1977–2015

Appendix 2

Table 8 Lag length selection criteria of the VAR system, sample: 1977–2015

Appendix 3

Table 9 The estimated autoregressive distributed lag model

Appendix 4

Fig. 5
figure 5

Model selection criteria

Appendix 5

Fig. 6
figure 6

Dynamic stability of the ARDL (3,4,4,5) model

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Ntembe, A., Amin, A.A. & Tawah, R. Analysis of public investments and economic growth in Cameroon. J Econ Finan 42, 591–614 (2018). https://doi.org/10.1007/s12197-017-9411-0

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  • DOI: https://doi.org/10.1007/s12197-017-9411-0

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