1. Allison, P.D.: Fixed Effects Regression Models. Sage, London (2009)
2. Bartels, B.L.: Beyond ‘fixed versus random effects’: a framework for improving substantive and statistical analysis of panel, time-series cross-sectional, and multilevel data. In: Franzese, R.J. (ed.) Quantitative Research in Political Science. Sage, Ann Arbor (2015)
3. Bell, A., Fairbrother, M., Jones, K. (2016) Fixed vs random effects: making an informed choice (in review).
www.researchgate.net/publication/299604336
. Accessed 28 Sept 2017
4. Bell, A., Jones, K.: Explaining fixed effects: random effects modelling of time-series cross-sectional and panel data. Polit. Sci. Res. Methods 3(1), 133–153 (2015)
5. Enders, C.K., Tofighi, D.: Centering predictor variables in cross-sectional multilevel models: a new look at an old issue. Psychol. Methods 12(2), 121–138 (2007)