New York University (NYU) professor Paul Romer speaks at a news conference after being named a winner of the 2018 Nobel Prize in Economics with professor William D. Nordhaus of Yale University.

New York University (NYU) professor Paul Romer speaks at a news conference after being named a winner of the 2018 Nobel Prize in Economics with professor William D. Nordhaus of Yale University.

New York University (NYU) professor Paul Romer speaks at a news conference after being named a winner of the 2018 Nobel Prize in Economics with professor William D. Nordhaus of Yale University.

New York University (NYU) professor Paul Romer speaks at a news conference after being named a winner of the 2018 Nobel Prize in Economics with professor William D. Nordhaus of Yale University.