Reports & Papers

Martin Weitzman explores theoretically how international cooperation (democratic voting and/or negotiation) to set a global carbon price might incentivize mitigation and yield a global price that approximates an economically-efficient "social cost of carbon."

The 2015 Paris Agreement completed the transition to pledge-and-review as the core of the multilateral climate policy architecture. With ambitious long-term temperature goals and country-specific emission mitigation pledges set through 2030, the unfinished business coming out of the Paris talks is the design and implementation of the climate transparency mechanism. This paper reviews the poor transparency track record under the UN Framework Convention on Climate Change, and uses this performance to motivate engagement of non-stakeholders to enhance the rigor of the information and analysis of countries' emission mitigation efforts.

The Harvard Project releases a collection of expert briefs on the elaboration of the Paris Agreement.

His Excellency Gerárd Araud, French Ambassador to the United States, opened the autumn 2016 programming of the Future of Diplomacy Project on September 12, 2016.

In this new report, Preventing Nuclear Terrorism: Continuous Improvement or Dangerous Decline?, Matthew Bunn, Martin Malin, Nickolas Roth, and William Tobey provide a global reality check on nuclear security. They note that effective and sustainable nuclear security capable of addressing plausible threats is the single most effective chokepoint preventing terrorists from acquiring a nuclear weapon.

This collective policy paper summarizes the main themes of Morocco's recent experience around migration policy. It draws upon many conversations with major stakeholders, group work, and site visits of the 16 Harvard students who participated in the winter field study course in Morocco and Italy, led by Prof. Claude Bruderlein and supported by the Middle East Initiative.

The emerging pledge and review approach to international climate policy provides countries with substantial discretion in how they craft their intended emission mitigation contributions. The resulting heterogeneity in mitigation pledges places significant demands for a well-functioning transparency and review mechanism. In particular, the specific forms of intended contributions necessitate economic analysis in order to estimate the aggregate effects of these contributions as well as to permit "apples-to-apples" comparisons of mitigation efforts. This paper discusses the tools that can inform such analyses as well as the institutional needs of climate transparency.

"One category of nuclear material that has not yet been adequately addressed throughout recent Nuclear Security Summits is military stockpiles.2 Instead, the Summit process has focused primarily on reducing the risk of civilian nuclear material theft..."

To assist Members of Congress and observers in analyzing these issues and judging a potential comprehensive agreement, the Belfer Center prepared this brief to outline the key facets of sanctions against Iran. Written as an addendum to our April policy brief, ‘Decoding the Iran Nuclear Deal,’ this report is driven by the policy debate’s leading questions.

The authors explore several approaches to an ambitious climate agreement in Paris in late 2015—including through carbon pricing.