Avril Haines, new advisor to Columbia World Projects, talks about North Korea and the Iran nuclear deal.

Richard Nephew, senior research scholar and program director at the Center on Global Energy Policy at Columbia SIPA, discusses the use of sanctions today in North Korea and Iran.

Tim Boersma writes about the risks of securitizing gas markets in Europe.

In a discussion with Marketplace, Joseph Stiglitz talks about trade, where the global economy is headed, and his book "Globalization and its Discontents: Anti-Globalization in the Era of Trump."

Joseph E. Stiglitz talks about the new tax bill from the Arab Strategy Forum in Dubai.

Nobel Prize winning economist Joseph Stiglitz critiques the Republican tax plan.

MPA-EPM alumni visit students to discuss what makes them successful in their positions and what skills they look for when hiring for their insititutions. 

Lew will continue to serve SIPA as a visiting professor of international and public affairs.

Richard K. Betts and Matthew Waxman outline a proposal to constrain the authority of the president to launch a nuclear first-strike.