GDP Growth in the Long Run
IN THIS CHAPTER
Compounding growth: The rule of 70
Marginalizing firm decisions
Growing GDP over time
Steadying the state
We’ve said it before and we’ll say it again: Economists love models. Building an economic model and considering its implications forces you to think hard about which assumptions lead to which results and whether those assumptions make sense. And it’s only after you have a model that you can begin to test it with evidence.
Some of the time, or maybe most of the time, economists disagree at one or more of these stages. They argue over assumptions. They argue over the empirical evidence. They argue over arguing. But in macroeconomics, one area where economists don’t argue too much is about the nature of the long run. There is a lot of agreement about the economy’s long-run behavior and which macroeconomic policies will promote a healthy long-run growth path.