We set up an endogenous growth model in which the efficiency of both capital and fossil energy can be improved, whereas the efficiency of one alternative energy source is limited. With capital and energy as complements, there exist two steady states: one stagnant where energy is fully derived...

This paper explores the implications of Unified Growth Theory for the origins of existing differences in income per capita across countries. The theory sheds light on three fundamental layers of comparative development. It identifies the factors that have governed the pace of the transition from...

This paper explores the implications of Unified Growth Theory for the origins of existing differences in income per capita across countries. The theory sheds light on three fundamental layers of comparative development. It identifies the factors that have governed the pace of the transition from...

The first step in understanding international income differences is measuring supplies of various factors of production and their productivity. Recent work suggests that these calculations should treat workers of different skill levels as imperfect substitutes. However, under this approach, it...

Technology is a key element for long-term growth and economic development. Given the stark concentration of innovation activities in a few countries most countries have to rely on the international diffusion of newly developed technologies. Some countries may fail to successfully perform the...

In a world where poor countries provide weak protection for intellectual property rights, market integration shifts technical change in favor of rich nations. Through this channel, free trade may amplify international income differences. At the same time, integration with countries where...