MAP20110017705 Belhadj, Hassine On parameter estimation in hierarchical credibility / Hassine Belhadj, Vincent Goulet, Tommy Ouellet En: Astin bulletin. - Belgium : ASTIN and AFIR Sections of the International Actuarial Association = ISSN 0515-0361. - 02/11/2009 Tomo 39 Número 2 - 2009 I. Goulet, Vincent . II. Ouellet, Tommy .