Hamilton 1984 & Hansen 1992 GNP data
hamilton84GNP
Vector of dates
US GNP series
US GNP log difference
Hansen, Bruce E. 1992. “The likelihood ratio test under nonstandard conditions: testing the Markov switching model of GNP.” Journal of applied Econometrics 7 (S1): S61–S82.
Hamilton, James D. 1989. “A new approach to the economic analysis of nonstationary time series and the business cycle.” Econometrica 57 (2): 357–384.