Likelihood Based Estimation in a Panel Setting: Robustness, Redundancy and Validity of Copulas

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Random parameters multivariate tobit and zero-inflated count data models: addressing unobserved and zero-state heterogeneity in accident injury-severity rate and frequency analysis (2016, background): “(5) 152 The solution, Ω̂, is assumed to be consistent for the true parameter vector, Ω0, and its asymptotic distribution 153 therefore is (Trivedi and Zimmer, 2005; and Prokhorov and Schmidt, 2009): 154 √𝑁(Ω̂ − Ω0) 𝑑 → N [0,− [𝑝lim(1/𝑁) ( 𝜕2𝐿𝑁(Ω) 𝜕Ω𝜕Ω′ ⁄ )] Ω0 −1 ].”