REFERENCES
- Berndt, E.R. (1990) The Practice of Econometrics, Classic and Contemporary. Reading MA: Addison-Wesley.
- Griffiths, W.E., Hill, C. and Judge, G. (1993) Learning and Practicing Econometrics. New York: Wiley.
- Nelson C. and Plosser, C. I. (1982) Trends and random walks in macroeconomic time series'. Journal of Monetary Economics vol lO pages 139-162.