of ideas, Real Business Cycles, and New Keynesian economics. While most texts now cover the rudiments of economic growth, the importance of ideas is rarely even mentioned. Similarly, other texts do not offer a balanced treatment of Real Business Cycle theory and New Keynesian theory, instead favoring one theory and relegating the other to a few pages that are poorly integrated with the overall macro model. We also knew that our efforts to reflect modern macroeconomics would be wasted if we reached only a small percentage of the students. We had to make the material simpler, more compelling, and more intuitive. By boiling the Solow model down to its essence and by providing multiple paths through the material, we have made it accessible to all principles students. Our modern approach to business fluctuations is also simpler and yet more advanced at the same time. It is simpler because we model business fluctuations as fluctuations in the growth rate of output, rather than in the level of output. That creates a natural progression from growth theory to business fluctuations. It is simpler because we develop our balanced approach to Real Business Cycles and New Keynesian economics within a single, unified dynamic AD-AS model. And no other textbook offers the same depth of analysis of monetary and fiscal policy in response to both real and nominal shocks. That's why we call our text Modern Principles: Macroeconomics. We have taken recent advances in how economists think and describe macroeconomics and we have integrated them throughout the text. Growth theory is given full treatment and it is integrated with our dynamic macroeconomic model. Insights from Real Business Cycle theory and New Keynesian theory appear early in the text, not tacked on at the end as an afterthought. We are certain you will see that this text provides the best coverage of the new principles that macroeconomists use today.

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