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Research Collection School Of Economics

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Connectedness

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High-Dimensional Vars With Common Factors, Ke Miao, Peter C. B. Phillips, Liangjun Su Mar 2023

High-Dimensional Vars With Common Factors, Ke Miao, Peter C. B. Phillips, Liangjun Su

Research Collection School Of Economics

This paper studies high-dimensional vector autoregressions (VARs) augmented with common factors that allow for strong cross-sectional dependence. Models of this type provide a convenient mechanism for accommodating the interconnectedness and temporal co-variability that are often present in large dimensional systems. We propose an ℓ1-nuclear-norm regularized estimator and derive the non-asymptotic upper bounds for the estimation errors as well as large sample asymptotics for the estimates. A singular value thresholding procedure is used to determine the correct number of factors with probability approaching one. Both the LASSO estimator and the conservative LASSO estimator are employed to improve estimation precision. The conservative …


Connectedness Of Asia Pacific Forex Markets: China's Growing Influence, Hwee Kwan Chow Jul 2021

Connectedness Of Asia Pacific Forex Markets: China's Growing Influence, Hwee Kwan Chow

Research Collection School Of Economics

This paper investigates the degree of connectedness of Asia Pacific forex markets post global financial crisis and relates it to developments in the renminbi markets. The connectedness measure developed by Diebold and Yilmaz (2014) reveal the strength of linkages across the US dollar currency pairs of twelve currencies, namely offshore renminbi, onshore renminbi, euro, yen, Australian dollar, Indian rupee, Korean won, Malaysian ringgit, New Zealand dollar, Singapore dollar, Thai baht and Taiwan dollar. With the gradual liberalization of China’s exchange rate system, shocks from the renminbi markets contribute more to fluctuations in almost all individual Asia Pacific currency markets vis-a-vis …