5Romer, D.(1996), "Advanced Macroeconomics," The McGraw-Hill Company,Inc.
6Silver, M. (2006), "Core Inflation Measures and Statistical Issues in Choosing Among Them," IMF Working Paper,06/97, International Monetary.
7Stock, J. H. and Watson, M. W.(1988), "Testing for Common Trends," Journal of the American Statistical Association, 83.
8Stock, J and M Watson (1991), "A probability model of the Coincident Economic Indicators," in K. Lahiri and G Moore (eds.) Leading economic indicators: new approaches and forecasting records, Cambridge University Press (Cambidge).
9Tierney, Heather L.R.(2009), "Examining the Ability of Core Inflation to Capture the Overall Trend of Total Inflation", MPRA Paper 22409, University Library of Munich.
10Warne, A.(1993), "A common trends model: lndentication, estimation and inference, ⅡES, Stockholm.