Harvard University has the best economics department in the world. AP Photo/Lisa Poole Given that economics is one of the most popular majors among millionaires around the world, it's probably a valuable degree.

But not every school shows strength in its economics department. QS World University Rankings published a list of the best schools in the world for economics.

To come up with this list, QS asked professors and people in academics around the world to identify the institutions where they believe the best work is currently taking place within their field of expertise. The list below shows the picks from economics professors.

You can read the complete methodology here.

Here are the top 30 universities around the world for economics: