My main goal in this essay is to say something about leftover open questions in macroeconomics, as well as new phenomena that need to be accommodated in early 21st century macroeconomics, and the sorts of ideas that might make progress possible. The essay first considers foundational questions and then the analysis of growth, fluctuations, wages and prices, and the medium run.
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Robert M. Solow (2000) studied this question.
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