Combining Disaggregate Forecasts or Combining Disaggregate Information to Forecast an Aggregate
预测总量:合成分项预测,还是整合分项信息?AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要比较分项信息、分项预测合成与总量模型,并以美国部门数据预测总量通胀为应用,直接对应宏观预测。
预测总量:合成分项预测,还是整合分项信息?AI 解读 ↓
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To forecast an aggregate, we propose adding disaggregate variables, instead of combining forecasts of those disaggregates or forecasting by a univariate aggregate model. New analytical results show the effects of changing coefficients, misspecification, estimation uncertainty, and mismeasurement error. Forecast-origin shifts in parameters affect absolute, but not relative, forecast accuracies; misspecification and estimation uncertainty induce forecast-error differences, which variable-selection procedures or dimension reductions can mitigate. In Monte Carlo simulations, different stochastic structures and interdependencies between disaggregates imply that including disaggregate information in the aggregate model improves forecast accuracy. Our theoretical predictions and simulations are corroborated when forecasting aggregate United States inflation pre and post 1984 using disaggregate sectoral data.