If Donald Trump is to be believed, the so-called American dream—the one where you can start at the bottom of life’s proverbial ladder and wind up at the top—is dead. But take a closer look at the data: the story’s much more nuanced than that. Turns out that whether the American dream is dead or alive depends a whole lot on where you live.

For instance, the American dream is alive and well—in Canada.

Raj Chetty, an economist at Stanford University who studies economic mobility, described the American dream’s geography today at the White House Frontiers Conference, inspired by WIRED’s November issue guest-edited by Barack Obama. Chetty studies people’s movements up and down the economic pyramid and compares their trajectories to where they grew up. And in one way, he’s found that Trump is right. The United States is one of the toughest places to achieve economic mobility.