Cameron, A. and Trivedi, P. (2005), "Microeconometrics: Methods and
Applications," Cambridge University Press, New York.
Ziliak, J. (1997), "Efficient Estimation With Panel Data when
Instruments are Predetermined: An Empirical Comparison of
Moment-Condition Estimators,"
Journal of Business and Economic Statistics, 15, 419-431.
https://amstat.tandfonline.com/doi/abs/10.1080/07350015.1997.10524720
Panel Study of Income Dynamics (PSID),
https://psidonline.isr.umich.edu