This book conducts a micro-level analysis of various determinants of infrastructure sector performance that affect development. This book focuses on the distribution segment of three basic infrastructure services: electricity, water and sanitation, and fixed telecommunications. This books aims to answer four main sets of questions: what are the main performance trends in the region, and how heterogeneous are they?; how does the performance of state-owned and private utilities differ?; how does the institutional design of regulatory agencies affect sector performance?; and what management mechanisms create incentives for improved performance?