skewness, whereas a negative one is expected under the model, which leads to estimated full efficiencies of all firms. We … stochastic frontier model allows the sample data to have the wrong skewness while estimating well-defined and non … bias than those of the classical model even if the population skewness has the correct sign. Finally, we apply the model to …

). The novelty of this paper is the consideration of the dependence between the two error terms in the case of panel data and … balanced panel case, several models describing the evolution of the inefficiency over time and the dependence between the two … error terms. The inefficiency and noise terms being dependent, a copula function which reflects the dependence between them …

). The novelty of this paper is the consideration of the dependence between the two error terms in the case of panel data and … balanced panel case, several models describing the evolution of the inefficiency over time and the dependence between the two … error terms. The inefficiency and noise terms being dependent, a copula function which reflects the dependence between them …

dependence.The relationship of housing market prices for nine U.S. census divisions is studied in thefirst essay. The results … isexamined in the second essay. The general dependence structure and degree is estimatedusing copula functions. The findings show … weak dependence between stock marketindices and oil prices for most countries except for the large oil producing nations …

pre-crisis period; however, we did find evidence of contagion and negative dependence after the onset of the crisis …