Download or read book Aggregation and the Microfoundations of Dynamic Macroeconomics written by Mario Forni and published by Oxford University Press. This book was released on 1997 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through careful methodological analysis, this book argues that modern macroeconomics has completely overlooked the aggregate nature of the data. In Part I, the authors test and reject the homogeneity assumption using disaggregate data. In Part II, they demonstrate that apart from random flukes, cointegration unidirectional Granger causality and restrictions on parameters do not survive aggregation when heterogeneity is introduced. They conclude that the claim that modern macroeconomics has solid microfoundations is unwarranted. However, some important theory-based models that do not fit aggregate data well in their representative-agent version can be reconciled with aggregate data by introducing heterogeneity.