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Periodic unobserved cycles in seasonal time series with an application to US unemployment
Koopman, Siem Jan; Ooms, Marius; Hindrayanto, Irma - In: Oxford bulletin of economics and statistics 71 (2009) 5, pp. 683-713
Persistent link: https://www.econbiz.de/10003875192
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Constructing seasonally adjusted data with time-varying confidence intervals
Koopman, Siem Jan; Franses, Philip Hans - In: Oxford bulletin of economics and statistics 64 (2002) 5, pp. 509-526
Persistent link: https://www.econbiz.de/10001741990
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Measuring synchronization and convergence of business cycles for the euro area, UK and US
Koopman, Siem Jan; Azevedo, João Valle e - In: Oxford bulletin of economics and statistics 70 (2008) 1, pp. 23-51
Persistent link: https://www.econbiz.de/10003624791