He argues they are familiar with the U.S. economy, where foreign trade makes up a small proportion of economic output and where there are what he calls' long-lasting nominal rigidities'.

Secondly, model output tracking robust control is proposed under the large-scale mode aggregation and the condition that the controlled nominal system is similar to the reference model.

He argues they are familiar with the U. S. economy, where foreign trade makes up a small proportion of economic output and where there are what he calls' long-lasting nominal rigidities'.