Year
2005	Panel Data Models," Chapter 17 in Palgrave Handbook of Econometrics: Volume I Econometric Theory, T.C. Mills and K. Patterson, editors, Palgrave Macmillan, Basingstoke, (2005), forthcoming.
1998	"Panel Data Methods" Chapter 8 in the Handbook of Applied Economic Statistics, Aman Ullah and David E.A. Giles, editors, Marcel Dekker, New York., 1998, pp.291-323.
1996	"Specification Issues", Chapter 12 in The Econometrics of Panel Data: Handbook of Theory and Applications, Laszlo Matyas and Patrick Sevestre, editors, Kluwer Academic Publishers, Dordrecht, 1996, pp. 293- 306.
1992	"Specification Issues", Chapter 9 in The Econometrics of Panel Data: Handbook of Theory and Applications, Laszlo Matyas and Patrick Sevestre, editors, Kluwer Academic Publishers, Dordrecht, 1992, pp. 196- 205.