手机已经在发展中国家大面积地覆盖,特别是在撒哈拉以南的非洲地区。现有证据显示,信息技术的更多使用已经提高了消费者市场及一些商品的农业市场效率,但信息技术给生产者市场带来何种影响,却证据寥寥。在阿克(Aker,2010)工作的基础上,我们估计了手机覆盖对尼日尔三种商品的生产价格离散的影响。结果显示,手机覆盖的提高为 Cell phones have been widely covered in developing countries, especially in sub-Saharan Africa. Available evidence shows that greater use of information technology has increased the efficiency of the agricultural markets in consumer markets and some commodities, but the impact of information technology on producer markets has been poorly documented. Based on the work of Aker (2010), we estimate the effect of cell phone coverage on the price dispersion of the three Nigerian commodities. The result shows that the coverage of the mobile phone is increased