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Showing 2 results for Copula Function
Ali Hedayati, Esmaile Khorram, Saeid Rezakhah,
Volume 22, Issue 2 (3-2018)
Abstract
Maximum likelihood estimation of multivariate distributions needs solving a optimization problem with large dimentions (to the number of unknown parameters) but two- stage estimation divides this problem to several simple optimizations. It saves significant amount of computational time. Two methods are investigated for estimation consistency check. We revisit Sankaran and Nair's bivariate Pareto distribution as an example. Two data sets (simulated data and real data) have been analyzed for illustrative purposes.
Ma , ,
Volume 24, Issue 1 (9-2019)
Abstract
One of the most common reasons of corneal transplantation in Iran is Keratoconus. Keratoconus is a non-inflammatory phenomenon which usually affects the cornea of both eyes. Since in corneal transplantation a portion of people may not reject the transplanted organ so for studying the effective factors on survival time of these data , the survival analysis with cure ratio was used.
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