The Cost of Road Infrastructure in Low- and Middle-Income Countries
研究了低收入和中等收入国家道路建设与维护的单位成本驱动因素，发现单位成本差异大，冲突国家和腐败程度高的国家成本显著更高，对改善贫困国家交通连接有政策启示。
The connections between transport infrastructure and economic development have been extensively analyzed in previous research, but little is known about the cost of infrastructure investments in poor countries. This paper examines drivers of unit costs of construction and maintenance of transport infrastructure in low- and middle-income countries and documents that: (i) there is a large dispersion in unit costs for comparable road work activities; (ii) after accounting for environmental drivers of costs, residual unit costs are significantly higher in conflict countries; (iii) there is evidence that costs are higher in countries with higher levels of corruption; (iv) these effects are robust to controlling for a country's public investment capacity and business environment. Our findings have implications for governments aiming to increase connectivity in poor countries.