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Michael Ewens

Michael Ewens

· David L. and Elsie M. Dodd Professor of FinanceVerified

Columbia University · French and Italian

Active 2002–2026

h-index20
Citations3.1k
Papers11973 last 5y
Funding
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Research topics

  • Business
  • Finance
  • Economics
  • Computer Science
  • Microeconomics
  • Monetary economics
  • Financial system
  • Industrial organization
  • Market economy

Selected publications

  • Liquid Claims on Illiquid Assets: The Economics of Retail Access to Private Markets

    2026-02-09

    article1st authorCorresponding

    Expanding retirement account access to alternative investments requires delivering illiquid returns to small-balance investors without compromising valuation integrity or liquidity. This paper studies the intermediation process using 110 registered interval and tender offer funds (>$100B AUM, 2015-2024) that offer periodic rather than daily repurchases. The performance gap between these vehicles and institutional drawdown peers averages approximately 130 basis points per quarter. A factor decomposition attributes roughly one-third of the gap to fees and a larger share to imperfect replication of the private-market return stream; liquidity buffers (8-15% of NAV) contribute at the margin. The funds hold an average of 76% illiquid assets, but valuations are frequently stale, with 40% of trading days recording zero NAV changes. Approximately 40% of interval funds face excess repurchase demand in a given quarter. Despite aggregate underperformance, retail-held assets generate comparable IRRs to same-vintage institutional peers while distributing significantly more cash, consistent with managers selecting liquid, distribution-friendly assets to satisfy repurchase obligations. The current equilibrium is one where regulatory frameworks permit access, but the structural costs of liquidity provision limit the transmission of the private equity premium to retail portfolios.

  • Liquid Claims on Illiquid Assets: The Economics of Retail Access to Private Markets

    SocArXiv (OSF Preprints) · 2026-02-09

    preprintSenior author

    Expanding retirement account access to alternative investments requires delivering illiquid returns to small-balance investors without compromising valuation integrity or liquidity. This paper studies the intermediation process using 110 registered interval and tender offer funds (>$100B AUM, 2015-2024) that offer periodic rather than daily repurchases. The performance gap between these vehicles and institutional drawdown peers averages approximately 130 basis points per quarter. A factor decomposition attributes roughly one-third of the gap to fees and a larger share to imperfect replication of the private-market return stream; liquidity buffers (8-15% of NAV) contribute at the margin. The funds hold an average of 76% illiquid assets, but valuations are frequently stale, with 40% of trading days recording zero NAV changes. Approximately 40% of interval funds face excess repurchase demand in a given quarter. Despite aggregate underperformance, retail-held assets generate comparable IRRs to same-vintage institutional peers while distributing significantly more cash, consistent with managers selecting liquid, distribution-friendly assets to satisfy repurchase obligations. The current equilibrium is one where regulatory frameworks permit access, but the structural costs of liquidity provision limit the transmission of the private equity premium to retail portfolios.

  • Liquid Claims on Illiquid Assets: The Economics of Retail Access to Private Markets Preliminary and incomplete

    SSRN Electronic Journal · 2026-01-01

    preprintOpen access1st authorCorresponding
  • Venture Capital and Startup Agglomeration

    The Journal of Finance · 2025-04-01 · 10 citations

    articleOpen accessSenior authorCorresponding

    ABSTRACT This paper examines venture capital's (VC) role in the geographic clustering of high‐growth startups. We exploit a rule change that disproportionately impacted U.S. regions that historically lacked VC financing via a restriction of banks to invest in the asset class. A one‐standard‐deviation increase in VCs' exposure to the rule led to a 20% decline in fund size and a 10% decrease in the likelihood of raising a follow‐on fund. Startups were not wholly cushioned: financing and valuations declined. Startups also moved out of impacted states after the rule change, likely exacerbating existing geographic disparity in entrepreneurship.

  • Corporate Hierarchy

    2025-10-12

    preprintOpen access1st authorCorresponding

    We introduce a novel measure of corporate hierarchies for over 3,100 U.S. public firms. This measure is obtained from online resumes of 7 million employees and a network estimation technique that allows us to identify hierarchical layers. Equipped with this measure, we document several facts about corporate hierarchies. Firms have on average ten hierarchical layers and a pyramidal organizational structure. More hierarchical firms have a more educated workforce, higher internal promotion rates, and longer employee tenure. Their operating performance is higher, but they face higher administrative costs.They are more active acquirers and produce more patents, but not higher-quality patents. They exhibit lower stock return volatility and operating asset volatility. We also examine how companies adjust their hierarchies in response to demand and knowledge shocks. We find that pharmaceutical companies increased their number of layers following the Covid-19 pandemic, while companies flattened their hierarchies following the adoption of artificial intelligence (AI) technologies. These findings are consistent with the theoretical predictions of existing models of corporate hierarchies.

  • Board Dynamics over the Startup Life Cycle

    2025-02-15 · 2 citations

    preprintOpen access1st authorCorresponding

    We explore the dynamics of venture capital (VC)-backed startup boards using novel data on director entry, exit, and characteristics. At formation, a typical board is entrepreneur-controlled. Independent directors join the median board after the second financing and hold a tie-breaking vote. Their presence is particularly likely when potential VC-entrepreneur conflicts are larger. At later stages, control switches to VCs and independent director characteristics change. These patterns align with key financial contracting theories, but also highlight unique roles of independent directors over the life cycle: mediation followed by advising. Independent directors thus represent another potential source of value-add to startup performance.

  • Corporate Hierarchy

    National Bureau of Economic Research · 2025-08-01 · 1 citations

    reportOpen access1st authorCorresponding
  • Corporate Hierarchy

    SSRN Electronic Journal · 2025-01-01

    preprintOpen access1st authorCorresponding
  • Corporate Hierarchy

    2025-08-14

    articleOpen access1st authorCorresponding

    We introduce a novel measure of corporate hierarchies for over 3,100 U.S. public firms. This measure is obtained from online resumes of 7 million employees and a network estimation technique that allows us to identify hierarchical layers. Equipped with this measure, we document several facts about corporate hierarchies. Firms have on average ten hierarchical layers and a pyramidal organizational structure. More hierarchical firms have a more educated workforce, higher internal promotion rates, and longer employee tenure. Their operating performance is higher, but they face higher administrative costs. They are more active acquirers and produce more patents, but not higher-quality patents. They exhibit lower stock return volatility and operating asset volatility. We also examine how companies adjust their hierarchies in response to demand and knowledge shocks. We find that pharmaceutical companies increased their number of layers following the Covid-19 pandemic, while companies flattened their hierarchies following the adoption of artificial intelligence (AI) technologies. These findings are consistent with the theoretical predictions of existing models of corporate hierarchies.

  • Corporate Hierarchy

    SSRN Electronic Journal · 2025-01-01

    articleOpen access1st authorCorresponding

Frequent coauthors

  • Ramana Nanda

    295 shared
  • Christopher Stanton

    166 shared
  • Matthew Rhodes‐Kropf

    Massachusetts Institute of Technology

    134 shared
  • Alexander S. Gorbenko

    102 shared
  • Arthur G. Korteweg

    University of Southern California

    102 shared
  • Joan Farre-Mensa

    18 shared
  • Nadya Malenko

    15 shared
  • Ting Xu

    11 shared
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