Excerpt: “How do you weigh the economic benefit of the thoughts in Bill Gates' head? The sand on a beach can be measured, but how do you calibrate the value of the idea that turned those silica grains into silicon microchips? Though they sound like questions from a Mensa parlor game, they’re actually from the work of economist Paul Romer, and his answers may just revolutionize the study of economics. A sage for the silicon age, Romer is upgrading the dismal science to keep pace with the digital revolution.”

Click here to read the full article in which Paul Romer is name one of Time’s 25 most influential Americans.