When employers cannot tell whether a school truly has many good students or whether it is just giving easy grades, schools have an incentive to inflate grades to help their mediocre students. However schools also care about preserving the value of good grades for their good students. We...

A candidate for political office has private information about his and his rival's qualifications. A more informative positive (negative) campaign generates a more accurate public signal about his own (his rival's) qualifications, but costs more. A high type candidate has a comparative advantage...