Returns to Local and Transport Infrastructure under Regional Spillovers
This article pays special attention to the spatial dimension of public capital in regional economic growth. We assume that the effect of infrastructure on productivity depends on the type of public infrastructure in question: that is, local infrastructures enhance economic activity in the area where they are located, whereas transport and communication infrastructure may produce both benefits in the area where they are located and positive or negative spillovers to other regions. We also obtain conclusions on whether the link between growth and public capital depends on the amount of existing public capital stocks. Results for the Spanish provinces during a long time period suggest that the returns to local infrastructure are much greater than the returns to transportation, although in both cases, we observe strong decreasing returns to their accumulation. Finally, negative spillovers across regions in transport capital investments are obtained.
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