hat are the four major sources of market failure? explain briefly why each prevents the competitive market from operating efficiently. part 2 the four major sources of market failure are part 3 a. market power, the government, externalities, and private goods. b. , , complete information, and externalities. c. market power, incomplete information, externalities, and public goods. d. market power, incomplete information, , and . e. competition, symmetric information, externalities, and public goods.