Karabiyik, H., Reese, S. and Westerlund, J. (2017). On the role of the rank condition in CCE estimation of factor-augmented panel regressions Journal of Econometrics, 197(1):60--64.
Gerritsen, S., Plug, E. and Webbink, D. (2017). Teacher quality and student achievement: Evidence from a sample of Dutch twins Journal of Applied Econometrics, 32(3):643--660.
