Competition policy and government intervention

Thanks to tutor2u for this slide show
http://www.tutor2u.net/economics/reference/revision-presentation-on-competition-policy?utm_medium=email&utm_campaign=Economics%20daily%20digest%20Sun%2021st%20February%202016&utm_content=Economics%20daily%20digest%20Sun%2021st%20February%202016+CID_e9f231bd154c95da3e5e8c51ad8a7cbd&utm_source=CampMonitor&utm_term=Competition%20Policy%20Study%20presentations%20Why%20does%20the%20government%20intervene%20in%20markets%20to%20maintain%20competition