Columbia Business Insights

Expertise in credit rating agencies, private credit markets, insurance regulation, and the measurement of credit risk. Our research shows that private ratings are systematically more inflated and less accurate than public ratings, allowing credit risk to be understated in regulated insurance portfolios. .faculty-items { display: grid; } @media (min-width: 1024px) { .faculty-items { grid-template-columns: repeat(3, 1fr); } } .m-listing-faculty, .m-listing-pgprofile { flex-direction: column; }

Professor Tomasz Piskorski is quoted.

Columbia Business School's Professor Stijn Van Nieuwerburgh and NYU Stern's Professor Arpit Gupta were featured in a Bloomberg Opinion column examining the post-pandemic urban doom loop — a concept Van Nieuwerburgh coined and introduced in the landmark paper "Work from Home and the Office Real Estate Apocalypse," now published in the American Economic Review. In the piece, Van Nieuwerburgh warns that New York City faces deep fiscal trouble, citing an effective doubling of office property tax rates and no clear path to financial health. Gupta traces the historical roots of urban flight while noting encouraging signs in New York's office-to-apartment conversion pace. Both researchers see the doom loop as a continuing risk, driven by falling commercial real estate values, shrinking tax revenues, and the enduring shift to remote work — and underscore that while the economic fixes may be straightforward, the political will to implement them remains the critical missing ingredient.

Columbia Business School’s Professor Brett House authored an op-ed in Maclean’s analyzing Canada’s Canada Strong Fund (CSF). In the piece, House explores whether the $25-billion fund—a government initiative to retain capital and investment in Canadian companies—can effectively address the country’s economic challenges. He highlights concerns about the fund’s structure, its reliance on government borrowing, and its potential to keep Canadian businesses from seeking foreign investment. House also emphasizes the need for broader reforms in trade, immigration, and procurement to complement the CSF’s goals.

Columbia Business School’s Professor Michael Ewens provided commentary to PitchBook on the resurgence of venture-backed IPO activity. In the article by Michael Bodley and Kia Kokalitcheva, Professor Ewens discussed how IPO momentum is returning unevenly across sectors, reflecting shifting investor appetite and market conditions. He highlighted the dynamics shaping exit opportunities for startups in today’s financial environment.

Columbia Business School’s Professor Sheena Iyengar was featured in Fortune in an article examining how Gen Z workers are adapting to an AI-driven labor market. The article discusses innovation, career strategy, and the evolving psychology of opportunity in a rapidly changing workplace environment.

Columbia Business School’s Professor Gernot Wagner provided expert commentary to Bloomberg News on how cities are adapting to climate-related flooding risks. In the article by Emily Biuso, Professor Wagner discussed the growing use of large-scale engineering projects to protect coastal cities from increasingly severe weather and rising sea levels.

Research by Columbia Business School’s Professor Stijn Van Nieuwerburgh was featured in Governing in an article examining how cities are responding to the rise of remote work. In the piece by Josh Goodman, Professor Van Nieuwerburgh and his co-authors’ research, Office Real Estate Apocalypse, is cited in discussions about the long-term economic and policy implications of declining office occupancy rates.