We must address, individually and collectively, moral and ethical issues raised by cutting-edge research in artificial intelligence and biotechnology, which will enable significant life extension, designer babies, and memory extraction.

For centuries, economic thinkers, from Adam Smith to John Maynard Keynes, have tried to identify the elusive formula that makes some countries more prosperous and successful than others. My curiosity about this topic spurred me, as a young professor of economics in the late 1970s, to research new ways of measuring national competitiveness.

It was a hallmark of Nelson Mandela's leadership that being open to change made him appear not weaker, but even stronger.

I am a great enthusiast and early adopter of technology, but sometimes I wonder whether the inexorable integration of technology in our lives could diminish some of our quintessential human capacities, such as compassion and cooperation.

A lot of my energy is going to Code for America, Jen Pahlka's non-profit startup. We're doing a lot of great work teaching government how to apply technology and changing the culture of government.

There's the classic charitable contribution, which we receive thousands, and we're extremely grateful and they often come with notes from people, which are very heartwarming, about how much difference our products have made in their life on the Internet.

I learned not to confuse 'busy' with 'productive,' but I'm still far too addicted to email to resist its early-morning digital snuggles.

Sunday is a likely day to write a poem. Because poetry is a piece of language flying around: you'll find notebooks, something on your phone. It's about finding them and getting them off that crumpled piece of paper and onto my computer.