Our model of growth departs from both the Malthusian and neoclassical approaches by including investments in human capital. We assume, crucially, that rates of return on human capital investments rise, rather than, decline, as the stock of human capital increases, until the stock becomes large....

We describe an economy where a durable good is produced with an increasing returns to scale technology. Equilibria in this economy take the form of business cycles in which consumption fluctuates too much and is too low on average. A 2-sector version of this economy with imperfect credit and...

The last 40 years have witnessed a remarkable boom in higher education, particularly of women. Today in most higher-income countries and many lower-income countries, more women than men complete tertiary education. We present a model of the market for college graduates in which supply is a...