1.http://pubsonline.informs.org/doi/abs/10.1287/mnsc.46.2.186.119262.http://pubsonline.informs.org/doi/abs/10.1287/isre.2.3.173
3.http://pubsonline.informs.org/doi/abs/10.1287/isre.11.4.342.11872
4.http://www.tandfonline.com/doi/abs/10.1080/10864415.2003.11044275#.VRu0_vmhlpY
5.http://pubsonline.informs.org/doi/abs/10.1287/mnsc.42.1.85
6.http://pubsonline.informs.org/doi/abs/10.1287/isre.13.2.205.83

非常感谢！