고차원 혼합주기 시계열모형의 해운경기변동 예측력 검정
The forecasting evaluation of the high-order mixed frequency time series model to the marine industry
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초록
본 연구는 혼합주기모형을 해운경기 예측에 활용하기 위해 기존의 비선형 장기균형관계분석에서 통계적으로 유의한 요인들을 단기모형에 적용하였다. 가장 일반적인 단일변수(univariate) AR(1) 모형과 혼합주기모형으로부터 각각 표본외 예측을 실시하여 예측오차와 비교한 결과 혼합주기모형의 예측력이 AR(1) 모형보다 향상됨을 확인하였다. 이러한 실증분석은 새로운 고차원 혼합주기모형이 해운경기변동 예측에 유용한 모형임을 의미하며, 즉, 최근 다변수 시계열 자료가 주로 장기균형관계(long-run equilibrium)를 대상으로 하고 있는데, 고차주기와 같은 정보를 분석에 포함할 경우 단기 해운경기 분석모형의 예측력이 향상될 수 있음을 의미하는 분석결과이다.
Abstract
This study applied the statistically significant factors to the short-run model in the existing nonlinear long-run equilibrium relation analysis for the forecasting of maritime economy using the mixed cycle model. The most common univariate AR(1) model and out-of-sample forecasting are compared with the root mean squared forecasting error from the mixed-frequency model, and the prediction power of the mixed-frequency approach is confirmed to be better than the AR(1) model. The empirical results from the analysis suggest that the new approach of high-level mixed frequency model is a useful for forecasting marine industry. It is consistent that the inclusion of more information, such as higher frequency, in the analysis of long-run equilibrium framework is likely to improve the forecasting power of short-run models in multivariate time series analysis.
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