Testing for differences in survey‐based density expectations: A compositional data approach
调查密度预期差异检验:组成数据方法AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要以调查中的密度预期和预测者差异为研究对象,并使用专业预测者与消费者预期调查,因此归入预测与即时预测。
调查密度预期差异检验:组成数据方法AI 解读 ↓
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Summary We propose to treat survey‐based density expectations as compositional data when testing either for heterogeneity in density forecasts across different groups of agents or for changes over time. Monte Carlo simulations show that the proposed test has more power relative to both a bootstrap approach based on the KLIC and an approach that involves multiple testing for differences of individual parts of the density. In addition, the test is computationally much faster than the KLIC‐based one, which relies on simulations, and allows for comparisons across multiple groups. Using density expectations from the ECB Survey of Professional Forecasters and the US Survey of Consumer Expectations, we show the usefulness of the test in detecting possible changes in density expectations over time and across different types of forecasters.