Over the past decade, rising oil prices have translated into high levels of public investment in most MENA and CCA oil exporters. This has prompted questions about the efficiency of public investment in generating growth and closing infrastructure gaps, as well as concerns about fiscal...

This paper aims to provide an explanation for the robust and consistent relationship between public investment in transport and communication and economic growth that has frequently surfaced in recent empirical studies. Using both informal and formal causality tests, the paper finds that, for a...