Using a fixed effects panel regression model for count data on illegal dumping incidents in 16 provinces in Korea from 2001 to 2003 as reported by civilians to local government, we analyzed the effect of the unit pricing system on the propensity for illegal dumping. We found that a 1% increase...

This paper studies the asymptotic properties of the semiparametric estimator considered by Pagan and Ullah (1988) and Pagan and Hong (1991) for models with risk terms. We show that when the risk term is nonparametrically specified, the estimator with generated regressors suggested by Pagan and...

This paper derives several Lagrange Multiplier tests for the unbalanced nested error component model. Economic data with a natural nested grouping include firms grouped by industry; or students grouped by schools. The LM tests derived include the joint test for both effects as well as the test...