Planet Money's Adam Davidson has been traveling to Haiti since January's devastating earthquake and asking some key questions about what it will take to rebuild (or even build) that nation's economy.  And in true Planet Money fashion, he has been marrying the micro and the macro, to give us vivid radio pieces.  Now he is teaming up with Frontline on a series of reports.  Here's one that benefits from video.  It is about the standard mode of transportation for many Haitians: "tap-taps."  Tap-taps are small, wildly decorated buses.  These privately owned buses are essential in a place where just 3 percent of the population owns cars.  Davidson was struck by the artistry he saw in the murals painted on the buses.  And he found that the bold paint-jobs are simply good business:

For more of Planet Money's coverage from Haiti, click here.