From Paul Krugman:
The answer, I’d argue, is that business decisions are a lot less sensitive to financial incentives — including tax rates — than conservatives claim. And appreciating that reality doesn’t just undermine the case for the Trump tax cut. It undermines Republican economic doctrine as a whole.
About business decisions: It’s a dirty little secret of monetary analysis that changes in interest rates affect the economy mainly through their effect on the housing market and the international value of the dollar (which in turn affects the competitiveness of U.S. goods on world markets). Any direct effect on business investment is so small that it’s hard even to see it in the data. What drives such investment is, instead, perceptions about market demand.
