Words are the New Numbers: A Newsy Coincident Index of the Business Cycle
文字成为新数字:基于新闻的商业周期同步指数AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确用时变动态因子模型构建商业周期指数,并开展 GDP 的样本外即时预测。
文字成为新数字:基于新闻的商业周期同步指数AI 解读 ↓
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I construct a daily business cycle index based on quarterly GDP growth and textual information contained in a daily business newspaper. The newspaper data are decomposed into time series representing news topics, while the business cycle index is estimated using the topics and a time-varying dynamic factor model where dynamic sparsity is enforced upon the factor loadings using a latent threshold mechanism. The resulting index classifies the phases of the business cycle with almost perfect accuracy and provides broad-based high-frequency information about the type of news that drive or reflect economic fluctuations. In out-of-sample nowcasting experiments, the model is competitive with forecast combination systems and expert judgment, and produces forecasts with predictive power for future revisions in GDP. Thus, news reduces noise. Supplementary materials for this article are available online.