Kim (1995) provides a sufficient condition to rank information systems when the first-order approach is valid. The basis for the condition is the comparison of the likelihood ratio distributions. I show, first, that Kim’s criterion is not necessary when the limited liability of the agent...

Kim (1995) provides a sufficient condition to rank information systems when the first-order approach is valid. The basis for the condition is the comparison of the likelihood ratio distributions. I show, first, that Kim's criterion is not necessary when the limited liability of the agent binds....