Collins Bartholomew distributes mobile phone coverage maps on behalf of the GSMA (an association of major GSM mobile service providers around the world). It is not for free of charge.
Used by various papers that look at the impact of mobile phones, including Pierskalla and Hollenbach (2013), Gonzalez (2015) "Social Monitoring and Electoral Fraud: Evidence from a Spatial Regression Discontinuity Design in Afghanistan" and Manacorda and Tesei (2016) "Liberation Technology: Mobile Phones and Political Mobilization in Africa".
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