possible to distinguish persistent effects in the inefficiency from firm inefficiency heterogeneity and to capture differences … separating these heterogeneity factors from the dynamics of inefficiency improves model fit. On the other hand, acquisitions are …

characteristics to inefficiency if heterogeneity is unaccounted for. However, it is not clear in general in which component of the … inference for stochastic frontier models capturing both observed and unobserved heterogeneity under half normal, truncated and … heterogeneity affects the scale of the inefficiency. We also see that the inclusion of unobserved heterogeneity is still relevant …

suggests high inefficiency persistence and heterogeneity in the Colombian distribution sector. In this paper, we propose an … extension of dynamic stochastic frontier models that accounts for unobserved heterogeneity in the inefficiency persistence and …