References
Baltagi, Badi H. (2005). Econometric Analysis of Panel Data, Third Edition, West Sussex, England: John Wiley & Sons.
Gilley, O.W., and R. Kelley Pace (1996). “On the Harrison and Rubinfeld Data,” Journal of Environmental Economics and Management, 31, 403–405.
Harrison, D. and D. L. Rubinfeld (1978). “Hedonic Housing Prices and the Demand for Clean Air,” Journal of Environmental Economics and Management, 5, 81-102.