Template-Type: ReDIF-Article 1.0 Author-Name: Catherine Waddams Price and Minyan Zhu Title: Non-discrimination Clauses: Their Effect on British Retail Energy Prices Classification-JEL: F0 Volume: Volume 37 Issue: Number 2 Year: 2016 Abstract: UK governments and the energy regulator have shown increasing concern about the health of competition in the residential energy market, following their pioneering deregulation at the end of the last century. We identify the effects of introducing the non-discrimination clauses in 2009, a major regulatory intervention and the first since deregulation. We explore the effect of this intervention on the price movements of the six major players, and find that the nature of competition in the industry has changed, with less effective rivalry between the regional incumbents and large regional competitors following the intervention; companies seem to have 'retreated' to their home regions, leaving a market where pricing behaviour resembles more closely a duopoly between British Gas and the regional incumbent. Handle: RePEc:aen:journl:ej37-2-Waddams File-URL: http://www.iaee.org/en/publications/ejarticle.aspx?id=2754 File-Format: text/html File-Restriction: Access to full text is restricted to IAEE members and subscribers.