References

D. Begg, S. Fischer, and R. Dornbusch. Economics. McGraw-Hill, 5th edition, 1997, ISBN 0 07 709412-3
R. S. Pindyck and D. L. Rubinfield. Econometric Models and Economic Forecasts. Irwin McGraw-Hill, 4th edition, 1997, ISBN 0-07-913292-8.
R. J. Barro and X. Sala-i-Martin. Convergence. Journal of Political Economy, 100(2):223–251, April 1992. URL http://www.columbia.edu/~xs23/papers/pdfs/converg.pdf. (URL accessed on May 18, 2003).

D. Begg, S. Fischer, and R. Dornbusch. Economics. McGraw-Hill, 5th edition, 1997, ISBN 0 07 709412-3