by Erik Stafford - Publications - Faculty & Research - Harvard Business School

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April 2020
Article

A Theory of Experimenters: Robustness, Randomization, and Balance

By: Abhijit Banerjee, Sylvain Chassang, Sergio Montero and Erik Snowberg

This paper studies the problem of experiment design by an ambiguity-averse decisionmaker who trades off subjective expected performance against robust performance guarantees. This framework accounts for real-world experimenters’ preference for randomization. It also... View Details

Keywords: Experiment Design; Experimenters; Theory; Performance

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15 Jul 2008
First Look

First Look: July 15, 2008

"bottom-up" forces highlighted in these models and instead reflects more "top-down" interventions. We conclude with a discussion of some of the historical evidence on top-down interventions. Economic Catastrophe Bonds Authors:Joshua D. Coval, Jakub... View Details

Keywords: Martha Lagace

October 2022
Article

It’s Not Just the Prices: Time-Driven Activity-Based Costing for Initiation of Veno-Venous Extracorporeal Membrane Oxygenation at Three International Sites—A Case Review

By: Michael Nurok, Vin Pellegrino, Marc Pineton de Chambrun, Jonathan Warsh, Meredith Young, Erik Dong, Neil Parrish, Syed Shehab, Alain Combes and Robert S. Kaplan

The United States spends more for intensive care units (ICUs) than do other high-income countries. We used time-driven activity-based costing (TDABC) to analyze ICU costs for initiation of extracorporeal membrane oxygenation (ECMO) for respiratory failure to estimate... View Details

Keywords: Healthcare; Cost; Time-Driven ABC; Health Care and Treatment; Cost Management; Activity Based Costing and Management; Health Industry

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Article

Achieving Value in Highly Complex Acute Care: Lessons from the Delivery of Extra Corporeal Life Support

By: Michael Nurok, Jonathan Warsh, Erik Dong, Jeffrey Lopez, Mayumi Kharabi and Robert S. Kaplan

We applied a value (outcomes and cost) analysis to extracorporeal life support (ECLS), a relatively rare but very expensive ICU therapy with highly variable outcomes. To address the outcome component of the value approach, we created guidelines for ECLS delivery; to... View Details

Keywords: Health Care and Treatment; Cost Management; Value; Analysis

November 2007
Background Note

Asset Allocation I

By: Joshua D. Coval, Erik Stafford, Rodrigo Osmo, John Jernigan, Zack Page and Paulo Passoni

The goal of these simulations is to understand the mathematics of mean-variance optimization and the equilibrium pricing of risk if all investors use this rule with common information sets. Simulation A focuses on five to 10 years of monthly sector returns that are... View Details

Keywords: Asset Pricing; Capital; Investment Return; Risk Management; Mathematical Methods

Winter 2022
Article

Distributing a Billion Vaccines: COVAX Successes, Challenges, and Opportunities

By: Eric Budish, Hannah Kettler, Scott Duke Kominers, Erik Osland, Canice Prendergast and Andrew A. Torkelson

By January 2022, the COVAX international vaccine collaboration had allocated over a billion vaccines to over 140 countries. We describe and review the allocation process chosen, which reflected both an objective of equitably distributing vaccines across the world and... View Details

Keywords: Vaccines; Pandemics; Health Care and Treatment; Health Pandemics; Distribution; Supply Chain; Equality and Inequality

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2021
Working Paper

Limits to Bank Deposit Market Power

By: Juliane Begenau and Erik Stafford

Claims about the market power of bank deposits in the banking literature are numerous and far reaching. Recently, a causal narrative has emerged in the banking literature: market power in bank deposits, measured as imperfect pass-through of short-term market rates on... View Details

Keywords: Bank Deposits; Market Power; Net Interest Margin (NIM); Banks and Banking; Interest Rates; Risk and Uncertainty

29 Jan 2013
First Look

First Look: Jan. 29

reaping the benefits of FDI (which relate to when FDI will generate growth) and (2) the mechanisms by which FDI creates positive externalities (which relate to how FDI generates growth). Technology and Innovation Management... View Details

Keywords: Sean Silverthorne

January 2008
Background Note

Equity Options

By: Joshua Coval and Erik Stafford

The goal of this simulation is to understand the reliance of option values on volatility. When an investor trades an option, they are essentially trading volatility. Therefore, much of the focus in this lesson is on forecasting volatility. Students are able to use two... View Details

Keywords: Volatility; Forecasting and Prediction; Stock Options; Investment Return; Price; Market Transactions; Mathematical Methods; Value

January 2008
Background Note

Equity Derivatives

By: Joshua Coval and Erik Stafford

The goal of these simulations is to understand the dynamic replication technique behind the Black-Scholes/Merton options model. The simulations focus on a single stock and a risk-free discount bond, which are used to replicate a contingent payoff. The underlying stock... View Details

Keywords: Equity; Bonds; Stocks; Price; Risk Management

January 2008
Background Note

Convertible Arbitrage

By: Joshua Coval and Erik Stafford

The goal of this simulation is to understand how convertible bonds can be viewed as a portfolio of simpler securities and to introduce an over-the-counter market. The convertible bonds that are available during the simulation are at-the-money and in-the-money so that... View Details

Keywords: Bonds; Investment Portfolio; Price; Risk Management; Mathematical Methods

2005
Working Paper

Asset Fire Sales (and Purchases) in Equity Markets

By: Joshua Coval and Erik Stafford

July 2000
Article

Managerial Decisions and Long-Term Stock-Price Performance

By: Mark Mitchell and Erik Stafford

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January 2008
Background Note

Collateralized Debt Obligations (CDOs)

By: Joshua Coval and Erik Stafford

This lesson integrated Merton's (1974) contingent claims model of debt and equity claims with the CAPM, which allows us to examine the risks and pricing of credit portfolios and the derivative claims issued against them. In particular, this model is used to make... View Details

Keywords: Decision Choices and Conditions; Borrowing and Debt; Credit Derivatives and Swaps; Investment Portfolio; Risk Management

1999
Working Paper

Investigating the Economic Role of Mergers

By: Gregor Andrade and Erik Stafford

Article

Hinged Dissections Exist

By: Timothy G. Abbott, Zachary Abel, David Charlton, Erik D. Demaine, Martin L. Demaine and Scott Duke Kominers

We prove that any finite collection of polygons of equal area has a common hinged dissection. That is, for any such collection of polygons there exists a chain of polygons hinged at vertices that can be folded in the plane continuously without self-intersection to form... View Details

Keywords: Folding; Reconfiguration; Hinge; Plygon; Refinement; Mathematical Methods

March 2008
Teaching Note

2006 Hurricane Risk (TN)

By: André Perold and Erik Stafford

Teaching Note for [207075]. View Details

Keywords: Decision Choices and Conditions; Loss; Investment; Insurance; Natural Disasters; California

January 2004
Article

Investigating the Economic Role of Mergers

By: Gregor Andrade and Erik Stafford

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March 2011
Supplement

Valuation of AirThread Connections, Faculty Spreadsheet Supplement (Brief Case)

By: Erik Stafford and Joel L. Heilprin

Keywords: Present Value; Tax Accounting; Capital Costs; Synergy; Telephony; Wireless Technologies; Assets; Cost of Capital; Valuation; Capital Structure; Cash Flow; Communication; Taxation; Accounting; Wireless Technology

June 2009 (Revised March 2010)
Supplement

Hansson Private Label, Inc.: Evaluating an Investment in Expansion, Teaching Note Spreadsheet (Brief Case)

By: Erik Stafford and Joel L. Heilprin

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