Kumbhakar, Subal; Lai, Hung-Pin - In: International journal of empirical economics 1 (2022) 1, pp. 1-38
components, i.e. εit=τi−ηi+vit−uit, where ηi and uit are the persistent and transient inefficiency components, τi is the random … variances and dependence among the error components. Additionally, we examined models that introduce allocative inefficiency …. Models that use both multi-step and system approaches to model allocative inefficiency are also examined. …