Liberalization and changing spatial configurations in Nigeria's domestic air transport network

In realization of the increasingly important role played by air transport, the Nigerian government followed the global trend of deregulation in reforming its domestic airline industry in 1985. Some of the effects of deregulation have been consistent with observed trends in other countries but others have been quite different. The abandonment of less profitable routes in the short term as well as the unfolding core-periphery structures following the emergence and dominance of certain core control centers replicates what obtained in the United States. However, evidence from literature suggesting that liberalization in practice has often resulted in the rising concentration of connectivity in a limited number of nodes and links rather than in its dispersal over the network at large does not hold yet in Nigeria's domestic air network. This paper shows that the shifting balance between concentration and dispersal in Nigeria's domestic network is generally skewed towards dispersal. Passenger traffic is more dispersed among nodes as gleaned from diminishing standard deviation values with increasing number of nodes. Generally speaking, overall connectivity also tends towards more evenness in the network since deregulation. (C) 2011 Elsevier Ltd. All rights reserved.