5Federgruen A. Competition under generalized attraction models: Applications to quality competition under yield uncertainty[J]. Management science, 2009, 12(55): 2028--2043.
6Chao G H. Quality improvement incentives and product recall cost sharing contracts[J]. Management science, 2009 , 7(55): 1122--1138.
7Williamson O E. Markets and hierarchies: Analysis and antitrust implications[J]. 1975.
