South Africa's electronic communications sector regulator, the Independent Communications Authority of South Africa (ICASA), has a mixed track record in carrying out its mandate. ICASA is part of a regulatory system for the telecommunications sector, that may be characterised as dysfunctional for the following reason: ICASA is not sufficiently independent from government. While regulated entities are generally partially state owned, this does create a conflict of interest for government. Nonetheless, ICASA has had some successes, where the interests of state-owned enterprises coincide with those of consumers. Its interventions in markets for voice services during the course of Telkom Mobile's entry into the market, for example, have resulted in retail voice price reductions of more than 30%. Now that problems relating to voice services markets have largely been resolved through the call termination rate intervention, ICASA needs to shift its focus to markets for broadband services in order to ensure that South Africa becomes more competitive relative to its peers through unbundling the local loop and assigning spectrum for broadband. In order to achieve this, Telkom needs to be fully privatised in order to reduce government pressure to delay local loop unbundling (LLU) and Telkom's wholesale and retail fixed-line operations should be functionally separated. ICASA needs to be further insulated from political interference and be properly resourced through industry levies and fees. Furthermore, a single appellate body for economic regulators ought to be established in order to improve accountability of the regulators and improve outcomes in the sector. There has been relatively little work, however, measuring ICASA's effectiveness in carrying out its mandate in respect of economic regulation of the telecommunications sector, including regulation of access to facilities, interconnection and prices. This paper addresses this gap and contributes towards answering the following questions: How effective is ICASA in fulfilling its role as an economic regulator? How has the wider regulatory system influenced ICASA's performance?ICASA's effectiveness will be evaluated by assessing market outcomes (including pricing, quality and access to services) in respect of voice and broadband services. These two services have been chosen because ICASA's economic regulation activities have focused on them over the period 2009-2014, through its call termination rate and local loop unbundling (LLU) interventions. While this contribution does not amount to a full performance assessment of ICASA, it measures an important aspect of performance, namely market outcomes.First, the methodology is presented. Next, the performance assessment evaluates the regulatory governance framework in South Africa (rules and institutions). Finally, there is a discussion of the impact of ICASA's interventions on voice and broadband services. In each of these sections, regulator interventions and instances of lack of intervention are described, and re...