Economic concentration activities in Vietnam are very complicated. The market has witnessed a wave of mergers and acquisitions with strong brand businesses, many equitisations of large state-owned enterprises, foreign business deals that dominate the Vietnamese market and high value acquisitions ... This shows that the economic concentration in Vietnam has the potential to cause the factors that form the dominant enterprises, and may affect the competitive environment. Therefore, economic concentration activities need to be strictly supervised and controlled by state management agencies to prevent acts that may cause anti-competitive effects in the market. The book consists of 4 chapters. Chapter 1: Overview of controlling economic concentration; Chapter 2: International experience in controlling economic concentration; Chapter 3: Laws on controlling economic concentration in Vietnam; Chapter 4: Practices on controlling economic concentration in Vietnam in the period of 2013-2018.