The Construction of the Real-Time Data Set and an Evaluation of Market Expectation with the Data Set

数据修订很重要，因为它们可能影响政策决定或这些决定依赖最新数据的方式。我们使用日本的实时数据集，估计数据修订如何影响政策分析和预测。这些修订更像是测量错误，而不是日本的有效预测。在日本没有实时数据，虽然该数据在美国和欧洲国家很受欢迎.我们建立了一个实时数据集。我们通过我们的网站发布数据集。

Data revisions are important because they may affect policy decisions or the manner in which such decisions depend on the most recent data. Using Japanese real-time data set, we estimate how policy analysis and forecasts can be affected by data revisions. The revisions are more like measurement error than like efficient forecast in Japan. There is no real-time data set in Japan, though the data set is popular in US and Euro countries. We construct a real-time data set. We publish the data set through our web site.