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.

While I am very grateful for the role social media plays in my ability to interact so personally with my fans, I also see time and time again how it negatively affects social relationships of the younger generation.

Of all the big Internet companies, Yahoo is the most highly valued on a price-earnings and price-sales basis.

In the modern road-running era, digital photography has intersected with weekend-warrior culture, creating a golden age of social-media humblebragging. For some, the marathon course is sacred ground. For others, it's a personal movie set.

Everyone has a voice. I mean, that's the good side to the Internet Age and social media. Obviously, there's negatives to it, but I think that the fact that everyone has a voice now is a tool that we can use for good.