TY - JOUR T1 - Business cycles in Iran: Evidence from asymmetry and correlated shocks TT - ادوار تجاری در اقتصاد ایران: شواهدی از عدم تقارن و همبستگی بین تکانه ها JF - IJNAA JO - IJNAA VL - 28 IS - 95 UR - http://qjerp.ir/article-1-1988-en.html Y1 - 2020 SP - 109 EP - 136 KW - Business cycles KW - Permanent shocks KW - transitory Shocks KW - Unobserved component KW - Markov Swiching N2 - In this Paper, business cycle asymmetry in Iran has been investigated using a nonlinear unobserved component model. In this regard, according to Kim and Nelson's (1999) interpretation of Friedman plucking model (1993), asymmetric transitory component has been modeled and simultaneously the possibility of a correlation between transitory and permanent shocks has also been considered. The results confirm weakly the asymmetric transitory shocks and the ceiling level for output according to Friedman’s model. In addition, it is also suggested by the results that ignoring the correlation between shocks underestimates the importance of permanent shocks to GDP. M3 10.52547/qjerp.28.95.109 ER -