“If interest rates are kept below their natural level, misguided investments occur: too much time is used in production, or, put another way, the investment returns don’t justify the initial outlay. ‘Malinvestment’, to use a term popularized by Austrian economists, comes in many shapes and sizes. It might involve some expensive white-elephant project, such as constructing a tunnel under the sea, or a pie-in-the-sky technology scheme with no serious prospect of ever turning a profit.”