Elizabeth H. Payne, Mulugeta Gebregziabher, James W. Hardin, Viswanathan Ramakrishnan, Leonard E. Egede. An empirical approach to determine a threshold for assessing overdispersion in Poisson and negative binomial models for count data. Communications in Statistics - Simulation and Computation, 47(6):1722-1738, 2018. [doi]
Abstract is missing.