Impact of Mobile Phones on Staple Food Markets in Mozambique: Improved Arbitrage or Increased Rent Extraction?

W. Zant
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引用次数: 1

Abstract

I exploit the quasi experimental nature of the roll-out of the mobile phone network from 1997 to 2009 in Mozambique, to estimate impact of search costs on the dispersion of maize prices and transport costs. The rollout explains a 4.5-11 percent reduction in maize price dispersion, and a larger reduction in per ton km transport costs. Traders benefit by capturing more rent income. Increased efficiency is mainly associated with lower prices for consumers. Various sources of heterogeneity are identified: the reduction is larger for markets that are far apart, for source markets with higher mobile phone coverage and during droughts.
手机对莫桑比克主食市场的影响:改善套利还是增加租金提取?
我利用从1997年到2009年莫桑比克移动电话网络推广的准实验性质,来估计搜索成本对玉米价格分散和运输成本的影响。玉米价格差异降低了4.5% - 11%,每吨公里运输成本也大幅降低。交易者通过获得更多的租金收入而受益。提高效率主要与降低消费者的价格有关。确定了各种异质性的来源:对于相距很远的市场、移动电话覆盖率较高的源市场和干旱期间,减少的幅度更大。
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