Alex Goldmark

Planet Money tries to make a program that reads Donald Trump's tweets and then trades stocks. The first step is training the program to interpret the tweets using something called sentiment analysis.

It's especially hard for developing countries to create jobs and foster small businesses to promote growth. But Nigeria took a risk on a massive national contest to find thousands of people with ideas for businesses and did something radical. It gave away millions of dollars to thousands of people who asked for it — and it worked. It is a rare success story for bold economic development programs.

The government of Brazil says it will switch 300,000 government computers from Microsoft's Windows operating system to open source software like Linux. Microsoft founder Bill Gates wants to meet with Brazil's president to discuss the change. Brazil is dropping all proprietary software.