Publications

December 2020 (Revised September 2023)
Case

PG&E and the First Climate Change Bankruptcy

By: Stuart C. Gilson and Sarah L. Abbott

In early 2020, the California-based utility PG&E filed a second amended plan of reorganization. PG&E had filed for Chapter 11 bankruptcy in the face of more than $30 billion of legal claims brought against it for its alleged role in causing California wildfires. The... View Details

Keywords: Chapter 11; Utilities; Liabilities; Restructuring; Insolvency and Bankruptcy; Debt Securities; Legal Liability; Climate Change; Utilities Industry; United States

June 2023
Case

Investing in the Climate Transition at Neuberger Berman

By: George Serafeim and Benjamin Maletta

By mid-2023, Neuberger Berman (NB), an active asset manager, had grown its assets under management to about half a trillion dollars and took pride in its client centricity and innovative spirit. Responding to client demand for investment products that integrated... View Details

April 2025
Article

How Central Banks Manage Climate and Energy Transition Risks

By: Esther Shears, Jonas Meckling and Jared Finnegan

Central banks have begun to examine and manage climate risks, including both transition risks of moving from fossil fuels to clean energy and physical climate risks. Here we provide a systematic assessment of how and why central banks address climate risks on the basis... View Details

Keywords: Banks and Banking; Risk and Uncertainty; Climate Change; Transition; Risk Management

October 2021
Article

Shareholder Activism and Firms' Voluntary Disclosure of Climate Change Risks

By: Caroline Flammer, Michael W. Toffel and Kala Viswanathan

This paper examines whether—in the absence of mandated disclosure requirements—shareholder activism can elicit greater disclosure of firms’ exposure to climate change risks. We find that environmental shareholder activism increases the voluntary disclosure of climate... View Details

Keywords: Transparency; Reporting; Shareholder Engagement; Shareholder Activism; Climate Change; Risk and Uncertainty; Environmental Management; Investment Activism; Corporate Disclosure; Communication Strategy; Information Publishing; Measurement and Metrics; Corporate Social Responsibility and Impact; Problems and Challenges; United States

06 Jan 2010
What Do You Think?

Is a Stringent Climate Change Agreement a Pot of Gold?

Summing Up Do we even need a stringent climate change agreement? Judging from this month's comments, a question can be raised about the necessity of a climate change agreement, stringent or not, as a... View Details

Keywords: by Jim Heskett; Energy; Utilities

07 Sep 2019
Op-Ed

Even for Non-Believers, These Are the Next Steps on Climate Change

Harvard Business School, where his work focuses on the future of cities, particularly as aided by the private finance and delivery of public infrastructure projects in both the developed and emerging worlds. [Image: Goddard Space Flight... View Details

Keywords: by John Macomber

04 Jun 2024
Cold Call Podcast

How One Insurtech Firm Formulated a Strategy for Climate Change

Keywords: Re: Lauren H. Cohen; Insurance

22 Apr 2020
Research Event

How Investors Are Sizing Up Climate Change’s Risks—and Opportunities

Until a few years ago, climate change’s potential impact seemed abstract for many investors. Now, as sea levels rise, hurricanes intensify, and droughts threaten food supplies, many investors are confronting its financial realities. But... View Details

Keywords: by Danielle Kost; Financial Services

24 Sep 2014
Op-Ed

The ABCs of Addressing Climate Change (From a Business Perspective)

It's Climate Week in New York City. The schedule features a UN Climate Summit, a People's Climate March, the Clinton Global Initiative, substantial criticism of the whole endeavor, and plenty of agitated interaction. There is a lot of noise here. How can businesses cut... View Details

Keywords: by John Macomber; Energy; Utilities

07 Oct 2013
Research & Ideas

The Case for Combating Climate Change with Nuclear Power and Fracking

If you ask any given environmentalist to identify the biggest threat to the planet, you may expect to hear about man-made climate change, consumerism, or overpopulation. But if you ask Harvard Business School's Joseph B. Lassiter, he'll... View Details

Keywords: by Carmen Nobel; Energy; Utilities

December 2024
Supplement

Northvolt: Building Batteries to Fight Climate Change (B)

By: George Serafeim, Debora L. Spar, Peter Tufano, Hugo Etchegoyhen and Emilie Billaud

The (B) case explores Northvolt’s Chapter 11 bankruptcy filing on November 21, 2024, highlighting the company’s struggles to scale operations amid a global EV market slowdown and internal production challenges. While the (A) case detailed Northvolt’s ambitious... View Details

Keywords: Batteries; Electric Vehicles; Climate Change; Corporate Social Responsibility and Impact; Energy; Green Technology; Insolvency and Bankruptcy; Investment; Technological Innovation; Risk Management; Failure; Business and Government Relations; Business and Shareholder Relations; Transportation; Green Technology Industry; Europe; Sweden

February 2007 (Revised March 2007)
Case

UBS and Climate Change--Warming Up to Global Action?

By: Felix Oberholzer-Gee, Forest L. Reinhardt and Elizabeth Raabe

Marco Suter, Executive Vice-Chairman, UBS Board of Directors, carefully studied the chart on his desk. It showed the public commitment of major financial institutions to help mitigate global warming. Evidently, UBS lagged behind its competitors. The graph was part of a... View Details

Keywords: Climate Change; Energy Conservation; Cost vs Benefits; Law; Financial Institutions; Environmental Sustainability; Corporate Accountability; Financial Services Industry

13 Nov 2019
Working Paper Summaries

Shareholder Activism and Firms’ Voluntary Disclosure of Climate Change Risks

Keywords: by Caroline Flammer, Michael W. Toffel, and Kala Viswanathan

2020
Chapter

Climate Change Is Going to Transform Where and How We Build

By: John D. Macomber

As fires, floods, and droughts increasingly threaten homes, businesses, and other institutions, climate risk has become financial risk. This implies that homeowners and investors have been making location decisions without properly pricing the cost of potential peril,... View Details

Keywords: Climate Change; Housing; Mortgages; Geographic Location; Real Estate Industry

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Teaching Interest

Overview

By: John D. Macomber

Teaching and research interests center around the matching of private and instituional capital into large public infrastructure and resilience projects that shape the future of cities and urban environments around the world. The world's population is increaslingly... View Details

Keywords: Finance; Infrastructure Finance; Water; Cities; Urbanization; Transportation; Architecture; Urban Planning; Construction; Africa; Latin America; Climate Change

2024
Working Paper

When Insurers Exit: Climate Losses, Fragile Insurers, and Mortgage Markets

By: Ishita Sen, Pari Sastry and Ana-Maria Tenekedjieva

This paper studies how homeowners insurance markets respond to growing climate losses and how this impacts mortgage market dynamics. Using Florida as a case study, we show that traditional insurers are exiting high risk areas, and new lower quality insurers are... View Details

Keywords: Insurance; Natural Disasters; Governing Rules, Regulations, and Reforms; Insurance Industry; Florida

SSRN

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May 2024
Supplement

Miami’s Climate Tech Potential (B): The 2024 Tech Hub Proposal

By: Rosabeth Moss Kanter and Jacob A. Small

Miami-Dade County led the work to get South Florida designated a national climate resilience tech hub, the only one of 31 focused on climate change, an urgent major issue for the region in light of global warming and sea level rise. Venture capitalists saw the... View Details

Keywords: Climate Change; Venture Capital; Investment; Entrepreneurship; Green Technology; Government Administration; City