Information Covariance Matrices for Multivariate Burr III and Logistic Distributions

Main result ofthis paper is to derive the exact analytical expressions of information and covariance matrices fo r multivariate burr iii and logistic distributions. these distributions arise as tractable parametric models in price and income distributions, reliability, economics, human population, some biological organisms to model agricultural population data and survival data. we showed that all the calculations can be obtainedfrom one main moment multi dimensional integral whose expression is obtained through some particular change ofvariables. indeed, we consider that this calculus technique for improper integral has its own importance.