MAP20090074576 Zhang, Tao Adverse selection and the opaqueness of insurers / Tao Zhang, Larry A. Cox, robert A. Van Ness En: The Journal of risk and insurance. - Nueva York : The American Risk and Insurance Association, 1964- = ISSN 0022-4367. - 01/06/2009 Tomo 76 Número 2 - 2009