eng Science and Education Publishing Journal of Finance and Economics 2328-7276 2020-08-19 8 4 190 200 10.12691/jfe-8-4-5 JFE2020845 article Tran Thi Nguyet 1 Tran Anh Vu 2 Law Department, National Economics University, Ha Noi, Vietnam International School, Thai Nguyen University, Thai Nguyen, Vietnam The article presents in detail the basic theoretical contents of price-fixing agreement, provides analysis by drawings, graphs and specific examples, and discusses price-fixing agreement acts, including: direct price-fixing agreement, indirect price-fixing agreement, price-using agreement to consolidate positions in the relevant market. From these theoretical contents and analysis, the author offers a number of assessments and proposes solutions to adjust Vietnam's competition laws in order to control price-fixing agreements to restrict competition, viewed from the efficiency standards of economics. Some of the issues discussed are: (1) Perfectly competitive market and monopoly market; (2) Direct price-fixing agreements to restrict competition from the viewpoint of economic efficiency; (3) Indirect price-fixing agreements to restrict competition; (4) Price-using agreements to consolidate its position in the relevant market. After offering analysis, discussion and research on issues of price fixing agreements, the article has made a number of author's recommendations on effect assessment content or the ability to cause significant anti-competitive effect of price fixing agreement to restraint competition in Vietnam. http://pubs.sciepub.com/jfe/8/4/5/jfe-8-4-5.pdf Competition Law 2018 Vietnam competition law price-fixing agreement price-using agreement competition restriction