Long-run Dynamic Correlation of Nonstationary Variables When the Trends are Misspecified

• 발행기관: 한국계량경제학회
• 저자명: Jin Lee
• 간행물 정보: 『JOURNAL OF ECONOMIC THEORY AND ECONOMETRICS』Vol.28 No.1, 49~66쪽, 전체 18쪽
• 주제분류: 경제경영 > 경제학
• 파일형태: PDF
• 발행일자: 2017.03.30

영문 초록

We study long-run comovement of the nonstationary time series variables with a focus on the use of coherency, defined as the long-run dynamic correlation. We pay attention to the effect of specification of trends on the longrun correlations by analyzing the cases that the data are either correctly or incorrectly detrended. Our simulation studies show that when the true process is trend stationary, time-removed long-run correlation estimates perform well, whereas the differenced case fails to generate valid outcomes due to degeneracy of the spectrums at the zero frequency of the series. We also provide empirical applications using unemployment rates of major cities in Korea from 1999 to 2016, and exemplify that false detrending could lead to nocuous outcomes. This work brings attention to correct specification of trends in nonstationary economic data in practice.

목차

1.INTRODUCTION

2. STOCHASTIC OR DETERMINISTIC TRENDS FOR LONG-RUN DYNAMIC CORRELATIONS

3. SIMULATION STUDIES

4. EMPIRICAL STUDIES

5. CONCLUSION

키워드

stochastic trend deterministic trend long-run correlations detrending degeneracy