Infrastructure has made a netcontribution of around one percentage point toNigeria's improved per capita growth performance inrecent years, in spite of the fact that unreliable powersupply held growth back. Raising the country'sinfrastructure endowment to that of the region'smiddle-income countries could boost annual growth by aroundfour percentage points. Nigeria has made important stridestoward improving much of its infrastructure. Compared tomany African peers, Nigeria has relatively advanced power,road, rail, and information and communications technology(ICT) networks that cover extensive areas of thenation's territory. In recent years, Nigeria hasconducted several important infrastructure sector reforms.The ports sector has been converted to a landlord model, andterminal concessions now attract private investment on ascale unprecedented for Africa. The power sector isundergoing a restructuring, paving the way for performanceimprovements; the sector is finally on a path toward raisingtariffs to recover a larger share of costs. Boldliberalization measures in the ICT sector have resulted inwidespread, low-cost mobile services, Africa's mostvibrant fixed-line sector, and major private investments inthe development of a national fiber-optic backbone. Aburgeoning domestic air transport sector has emerged, withstrong private carriers that have rapidly attained regional significance.