1Owyang, Michael T. ; Piger, Jeremy and Wall, Howard J. "Business Cycle Phases in U. S. States. "Review of Economics and Statistics, November 2005a, 87(4), pp. 604- 16.
2Okumura, Hirohiko and Tanizaki, Hisashi. "On Estimation of Regional Business Cycle in Japan Using Markov Switching Model. " Journal of Economics and Business
3Administration ( Kokumin - Keizai Zasshi), 2004, 190 ( 2 ), pp. 45 - 59 ( in Japanese).
