You want to evaluate future borrowers, but in order to train an algorithm that will help you identify future defaults, you have to train it and evaluate it on past data.

If competition for Kaggle's top talent becomes fierce enough among banks, insurance companies, hedge funds - we hope the world's best data scientists will earn more than $50 million per year, just like the world's best hedge fund managers.

It turns out that with Twitter data alone, we can go quite some way into figuring out someone's personality.

I love kite surfing and mountain bike riding. It's kind of interesting; my kite surfing ability has probably deteriorated with the rate of Kaggle's success.

I was always asking people about their work. How do you do a job like that? Do you love it? What does it pay? I was lucky to have access to people who could answer my questions. Otherwise, my life could have turned out very differently.

My job as a leader is to make sure everybody in the company has great opportunities, and that they feel they're having a meaningful impact and are contributing to the good of society. As a world, we're doing a better job of that. My goal is for Google to lead, not follow that.

Had I pursued my education long enough to learn all the conventional dos and don'ts of starting a business, I often wonder how different my life and career might have been.

The lifeblood of job creation in America is small business, but they can't get access to credit.