Transmission Channels of Public Investments Effects on Economic Growth: Case of the CEMAC Sub-region

The main objective of this research is to locate channels through which public investment can be forwarded in order to impact economic growth in the CEMAC sub-region. To achieve this goal, a dynamic generalized method of moments (GMM) and the two-stage least squares (TSLS) methods have been applied. Data to test our two hypotheses were collected from various sources. The results have shown that there effectively exist significant direct and indirect effects of public investment on economic growth. We also discovered that export and employment are being considered as the last shackles of the chain. To that effect, it is recommended to the CEMAC authorities to grant more interest to these variables during the elaboration of public investment policies.