期刊
OXFORD BULLETIN OF ECONOMICS AND STATISTICS
卷 -, 期 -, 页码 -出版社
WILEY
DOI: 10.1111/obes.12590
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This study develops a new approach for forecast combination that involves shrinking the weights towards equal weights and towards zero weight. The results show that this double shrinkage combination (DSC) approach is able to significantly predict excess returns to the S&P500 index. The DSC outperforms the naive equal-weighted combination and is found to have greater impact during economic recessions.
This study develops a new approach that shrinks the forecast combination weights towards equal weights by using weighted least squares and towards zero weight by using regularization constraints. We reveal the significant predictability of excess returns to the S&P500 index that can be achieved by using this double shrinkage combination (DSC). Furthermore, our DSC approach significantly outperforms the naive equal-weighted combination, solving the combination puzzle. The equal-weight shrinkage has greater effect in economic recessions, whereas the zero-weight shrinkage dominates in economic expansions. The DSC's superior performance over that of the naive combination is observed in the application of forecasting macroeconomic indicators.
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