Implications for Regional Science of the "Rebuilding Macroeconomic Theory Project"

The inability of macroeconomists to anticipate the Global Financial Crisis or reproduce it in their models has led to an important stock-taking of deficiencies in, and necessary modifications to, theories and models used pervasively by researchers and taught to graduate students. This stock-taking-the so-called "Rebuilding Macroeconomic Theory Project," organized by David Vines and Samuel Wills-has provided an opportunity for economy-wide modelers (who include regional scientists) to consider whether the theories and models they employ are adequate and appropriate to the tasks to which they put them. In this paper I provide a brief report on the project, retrace the development of macroeconomics, and summarize responses by prominent macroeconomists to a set of questions posed by organizers of the project, while drawing implications of these questions and responses for regional science. I then offer original suggestions from a regional scientist's perspective on what is missing from the "benchmark" macro-model, how financial frictions can be introduced, how behavioral foundations might be modified, how heterogeneity of agents might be captured, and what new stylized facts need to be explained. I proceed to illustrate how several of the suggested changes can be integrated in economy-wide models by drawing on a study of the impacts of monetary policy on consumption by different income groups in Indonesia. I close the paper by posing a number of "big-picture questions" on the implications of the RMTP for economy-wide modelers and regional scientists to ponder and by offering a brief reflection and aspiration.