Publications

11 Aug 2015
Working Paper Summaries

Structural GARCH: The Volatility-Leverage Connection

Keywords: by Robert F. Engle & Emil N. Siriwardane

July 2022
Article

The Pass-Through of Uncertainty Shocks to Households

By: Marco Di Maggio, Amir Kermani, Rodney Ramcharan, Vincent Yao and Edison Yu

Using new employer-employee matched data, this paper investigates the impact of uncertainty, as measured by idiosyncratic stock market volatility, on individual outcomes. We find that firms provide at best partial insurance to their workers. An increase in firm-level... View Details

Keywords: Employment Risk; Consumption; Employment; Risk and Uncertainty; System Shocks; Insurance; Household; Spending

2021
Article

An Empirical Examination of Sell-Side Brokerage Analysts' Published Research, Concierge Services, and High-Touch Services

By: David A. Maber, Boris Groysberg and Paul M. Healy

This paper uses a proprietary panel dataset to categorize and quantify the activities that sell-side brokerage analysts use to build and sustain their network of buy-side client relations. We then examine the marginal impact of these activities on key analyst outcome... View Details

Keywords: Sell-side Analysts; Analyst Ratings; Brokerage Commissions; Earnings Forecasts

March 2018
Article

Scraped Data and Sticky Prices

By: Alberto Cavallo

I use daily prices collected from online retailers in five countries to study the impact of measurement bias on three common price stickiness statistics. Relative to previous results, I find that online prices have longer durations, with fewer price changes close to... View Details

Keywords: Online Data; Scraped Data; Sticky Prices; Scanner Data; Consumer Price Index; Price; Data and Data Sets

2014
Working Paper

Governing Misvalued Firms

By: Dalida Kadyrzhanova and Matthew Rhodes-Kropf

Equity overvaluation is thought to create the potential for managerial misbehavior, while monitoring and corporate governance curb misbehavior. We combine these two insights from the literatures on misvaluation and governance to ask, when does governance matter?... View Details

Keywords: Valuation; Performance; Corporate Governance

September 2010 (Revised January 2012)
Case

OPOWER: Increasing Energy Efficiency through Normative Influence (A)

By: Amy J.C. Cuddy, Kyle Todd Doherty and Maarten W. Bos

The case profiles OPOWER, an energy efficiency software company that applies Cialdini's principles of social influence to successfully encourage consumers to reduce their energy usage. OPOWER was co-founded in 2008 by two young Harvard graduates, Dan Yates and Alex... View Details

Keywords: Mathematical Methods; Applications and Software; Attitudes; Entrepreneurship; Energy Conservation; Power and Influence; Growth and Development Strategy; Energy Industry; United States

Educators

2015
Working Paper

Crowdsourced Digital Goods and Firm Productivity: Evidence from Open Source Software

By: Frank Nagle

As firms increasingly rely on crowdsourced digital goods, understanding their impact on productivity becomes critical. This study measures the firm-level productivity impact of one such good, non-pecuniary (free) open source software (OSS). The results show a... View Details

Keywords: Open Source Distribution; Performance Productivity; Software

SSRN

March–April 2020
Article

Avoid the Pitfalls of A/B Testing

By: Iavor I. Bojinov, Guillaume Sait-Jacques and Martin Tingley

Online experiments measuring whether “A,” usually the current approach, is inferior to “B,” a proposed improvement, have become integral to the product-development cycle, especially at digital enterprises. But often firms make serious mistakes in conducting these... View Details

Keywords: A/B Testing; Experiment Design; Social Networks; Product Development; Performance Improvement; Measurement and Metrics; Social Media

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15 Aug 2012
Working Paper Summaries

Legislating Stock Prices

Keywords: by Lauren Cohen, Karl Diether & Christopher Malloy; Financial Services

23 Mar 2023
Research & Ideas

As Climate Fears Mount, More Investors Turn to 'ESG' Funds Despite Few Rules

Investor interest in social responsibility has skyrocketed in the past three years, even as US regulations to hold companies accountable remain in flux and the environmental, social, and governance (ESG) label itself draws backlash. Investors are willing to pay a... View Details

Keywords: by Rachel Layne; Financial Services

May 2023 (Revised November 2023)
Case

Arcos Dorados: Decarbonizing McDonald’s in Latin America

By: George Serafeim, Michael W. Toffel, Jenyfeer Martinez Buitrago and Mariana Cal

This case describes the decarbonization strategy of Arcos Dorados—McDonald’s largest independent franchisee, operating in 20 countries and territories in Latin America and the Caribbean—and how the company measured its greenhouse gas (GHG) emissions, including those... View Details

Keywords: Environmental Accounting; Animal-Based Agribusiness; Plant-Based Agribusiness; Change Management; Forecasting and Prediction; Environmental Sustainability; Food; Growth Management; Supply Chain; Corporate Social Responsibility and Impact; Strategy; Agriculture and Agribusiness Industry; Food and Beverage Industry; Green Technology Industry; Consumer Products Industry; Latin America; North and Central America; South America

Educators

October 2019
Article

Limited Investment Capital and Credit Spreads

By: Emil N. Siriwardane

Using proprietary credit default swap (CDS) data, I investigate how capital shocks at protection sellers impact pricing in the CDS market. Seller capital shocks—measured as CDS portfolio margin payments—account for 12% of the time-series variation in weekly spread... View Details

Keywords: Credit Risk; Derivatives; Credit Derivatives and Swaps; Capital Markets; Credit; Financial Institutions

27 Apr 2017
News

HBS Prof: Case Studies Need Diversity — Now

February 2014
Article

Causes and Frequency of Unplanned Hospital Readmission After Total Hip Arthroplasty.

By: W. W. Schairer, D. C. Sing, T. P. Vail and K J Bozic

BACKGROUND:
Total hip arthroplasty (THA) is a beneficial and cost-effective procedure for patients with osteoarthritis. Recent initiatives to improve hospital quality of care include assessing unplanned hospital readmission rates. Patients presenting for THA have... View Details

February 2025
Article

Innovations in Evaluating Ambulatory Costs of Cystic Fibrosis Care: A Comparative Study Across Multidisciplinary Care Centers in Ireland and the United States

By: Emma Brady, Ryan C. Perkins, Kate Cullen, Gregory S. Sawicki, Robert S. Kaplan and Gerardine Doyle

Lead clinicians at two large pediatric cystic fibrosis (CF) centers in the United States and Ireland measured and compared their ambulatory care costs. The clinicians selected three strata of patients (0–11 months, 1–5 years, and 6–17 years of age). Process maps were... View Details

Keywords: Health Care and Treatment; Cost; Service Delivery; Resource Allocation; Health Industry

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2020
Working Paper

An Empirical Guide to Investor-Level Private Equity Data from Preqin

By: Juliane Begenau, Claudia Robles-Garcia, Emil Siriwardane and Lulu Wang

This note provides guidance on the use of investor-level private equity data from Preqin for empirical research. Preqin primarily sources its cash flow data through Freedom of Information Act (FOIA) requests with U.S. public pensions. Our focus is on the components of... View Details

Keywords: Private Equity Returns; Prequin Data; Private Equity; Analytics and Data Science; Investment Return

SSRN

2024
Working Paper

Precautionary Debt Capacity

By: Deniz Aydin and Olivia S. Kim

Firms with ample financial slack are unconstrained... or are they? In a field experiment that randomly expands debt capacity on business credit lines, treated small-and-medium enterprises (SMEs) draw down 35 cents on the dollar of expanded debt capacity in... View Details

Keywords: Borrowing and Debt; Credit; Financing and Loans