en Material Managment Material Managment پژوهشي Research <p>Main result of this paper is to derive the exact analytical expressions of information and covariance matrix for multivariate Pareto, Burr and related distributions. These distributions arise as tractable parametric models in reliability, actuarial science, economics, finance and telecommunications. We showed that all the calculations can be obtained from one main moment multidimensional integral whose expression is obtained through some particular change of variables. Indeed, we consider that this calculus technique for that improper integral has its own importance. </p><br clear="all" ><p> </p> gamma and beta functions, polygamma functions; Information matrix, covariance matrix; multivariate pareto models 61 69 http://ijiepr.iust.ac.ir/browse.php?a_code=A-10-1-69&slc_lang=en&sid=1 GH. YARI yari@iust.ac.ir 18003194753284600562 18003194753284600562 Yes M. D JAFARI djafari@lss.supelec.fr 18003194753284600625 18003194753284600625 No