MAP20100085578 Witt, Robert C. Price competition, regulation, and systematic Underwriting risk in automobile insurance / Robert C. Witt, Jorge Urrutia En: Geneva papers on risk and insurance : issues and practice. - Geneva : The Geneva Association, 1976- = ISSN 1018-5895. - 03/10/1983 Tomo 8 Número 4 - 1983 I. Urrutia, Jorge .