Working Paper 892

In this paper, we develop a framework for assessing the efficiency of public subsidies in developing broadband fiber networks. We estimate a structural model of fiber entry using a rich dataset on fiber deployment for more than 34,000 municipalities in mainland France from 2014 to 2019. We then assess whether private investment would have occurred in subsidized municipalities in the absence of state aid for broadband deployment. We find that between 64% and 93% of the time, public subsidies were granted to municipalities where private entry would not have occurred. Overall, we estimate the cost of “inefficient” public subsidies to be between 243 and 902 million euros, with total subsidies amounting to 2,203 million euros by the end of 2019. Finally, we find that the plan helped to increase fiber coverage in subsidized municipalities in the early stages of fiber deployment.