Abstract: We present an analysis of the evolution of regulatory independence in practice for 23 Latin American and Caribbean countries in the telecommunications industry. Based on this analysis, we construct realistic indices of regulatory independence, which improve upon the measures of independence that have been used so far in the empirical regulation literature. We show that legal indices may give a partially distorted picture of the commitment ability of institutions. The combination of de facto and de jure independence has a positive and significant impact on network penetration both in old and in new telecommunications markets.