A sound and efficient financial system is an indispensable ingredient of economic growth. It consists primarily of banks and capital markets, which channel savings into investments and other productive activities that contribute to economic growth and augment the economy's productive capacity....

The expansion in the supply of energy services over the last couple of centuries has reduced the apparent importance of energy in economic growth despite energy being an essential production input. We demonstrate this by developing a simple extension of the Solow growth model, which we use to...