Publications

2008
Working Paper

Liquidity Needs in Economies with Interconnected Financial Obligations

By: Julio J. Rotemberg

A model is developed where firms in a financial system have to settle their debts to each other by using a liquid asset. The question that is studied is how many firms must obtain how much of this asset from outside the financial system to make sure that all debts... View Details

Keywords: Economy; Borrowing and Debt; Financial Liquidity; Networks

August 2020 (Revised June 2021)
Case

Just Arrived: Integrating Refugees in Sweden

By: Brian Trelstad, Emilie Billaud and Mette Fuglsang Hjortshoej

Just Arrived is an online platform that matches newly-arrived immigrants in Sweden with employment opportunities. As one of several for-profit and non-profit start-ups in Europe that is looking to address the refugee crisis, the case enables a comparative analysis of... View Details

Keywords: Immigration; Refugees; Employment; Integration; Business Model; Social Entrepreneurship; Growth and Development Strategy; Employment Industry; Sweden; Italy; Germany

Educators

13 Mar 2025
HBS Seminar

Sonny Tambe, Wharton

2018
Working Paper

Opportunistic Returns and Dynamic Pricing: Empirical Evidence from Online Retailing in Emerging Markets

By: Chaithanya Bandi, Antonio Moreno, Donald Ngwe and Zhiji Xu

We investigate how dynamic pricing can lead to higher operational costs through more product returns in the online retail industry. Dynamic pricing has been widely applied by many online retailers. Research has shown that, in response to dynamic pricing, some customers... View Details

Keywords: Price; Policy; Consumer Behavior; Cost Management; Emerging Markets; Retail Industry

23 Oct 2024
HBS Seminar

Rosa Ferrer, University of Pompeu Fabra and BSE

July–August 2021
Article

Why Do So Many Strategies Fail?

By: David J. Collis

THE PROBLEM: Seemingly successful new companies struggle to turn a healthy profit. Established firms get disrupted by upstarts. Companies that excel at serving their markets can’t adapt when customers’ tastes shift. THE ROOT CAUSE: All too often, business leaders focus... View Details

Keywords: Strategy; Strategic Planning; Business Model; Value; Value Creation; Opportunities

Find at Harvard

December 2011
Article

CEO and Board Chair Roles: To Split or Not to Split?

By: Aiyesha Dey, Ellen Engel and Xiaohui Liu

We examine the performance and compensation implications of firms' decisions to combine the roles of CEO and board chairman (duality). We document that firms that split the CEO and chairman positions due to investor pressure have significantly lower announcement... View Details

Keywords: CEO Duality; Board Chairman; Firm Performance; Pay-performance Sensitivity; Corporate Governance; Governing and Advisory Boards; Leadership; Performance Efficiency

Find at Harvard

2024
Working Paper

What Drives Variation in Investor Portfolios? Estimating the Roles of Beliefs and Risk Preferences

By: Mark Egan, Alexander MacKay and Hanbin Yang

We present an empirical model of portfolio choice that allows for the nonparametric estimation of investors' (subjective) expectations and risk preferences. Utilizing a comprehensive dataset of 401(k) plans from 2009 through 2019, we explore heterogeneity in asset... View Details

Keywords: Stock Market Expectations; Demand Estimation; Retirement Planning; Defined Contribution Retirement Plan; 401 (K); Finance; Investment Portfolio; Investment; Retirement; Behavioral Finance; Financial Services Industry; United States

SSRN

Spring 2016
Article

Net Neutrality: A Fast Lane to Understanding the Tradeoffs

By: Shane Greenstein, Martin Peitz and Tommaso Valletti

The last decade has seen a strident public debate about the principle of "net neutrality." The economic literature has focused on two definitions of net neutrality. The most basic definition of net neutrality is to prohibit payments from content providers to internet... View Details

Keywords: Internet and the Web; Policy

January–February 2023
Article

Data-Driven COVID-19 Vaccine Development for Janssen

By: Dimitris Bertsimas, Michael Lingzhi Li, Xinggang Liu, Jennings Xu and Najat Khan

The COVID-19 pandemic has spurred extensive vaccine research worldwide. One crucial part of vaccine development is the phase III clinical trial that assesses the vaccine for safety and efficacy in the prevention of COVID-19. In this work, we enumerate the first... View Details

Keywords: COVID-19; Health Testing and Trials; Forecasting and Prediction; AI and Machine Learning; Research; Pharmaceutical Industry

Find at Harvard

24 Feb 2009
First Look

First Look: February 24, 2009

complete, and advertisers can extend this delay both to improve detection of improper partner practices and to punish partners who turn out to be rule-breakers. I capture these relationships in a screening model with delayed payments and... View Details

Keywords: Martha Lagace

15 May 2007
First Look

First Look: May 15, 2007

economic models predict that they do not systematically differ. With online grocery data, we show that people are decreasingly impatient the further in the future their choices will take effect. In general,... View Details

Keywords: Martha Lagace

2023
Working Paper

Spatial Mobility, Economic Opportunity, and Crime

By: Gaurav Khanna, Carlos Medina, Anant Nyshadham, Daniel Ramos-Menchelli, Jorge Tamayo and Audrey Tiew

Neighborhoods are strong determinants of both economic opportunity and criminal activity. Does improving connectedness between segregated and unequal parts of a city predominantly import opportunity or export crime? We use a spatial general equilibrium framework to... View Details

Keywords: Urban Development; Transportation Networks; Crime and Corruption; Transportation Industry; Medellín; Colombia; South America

1975
Working Paper

Information, Efficiency and Equilibrium

By: Jerry R. Green

When economic agents receive information over time concerning future events it is likely that prices for commodities whose value is influenced by these events will fluctuate in response to changes in the state of knowledge. If such events occur periodically,... View Details

Keywords: Economics; Supply and Industry; Price

2019
Working Paper

Collusive Investments in Technological Compatibility: Lessons from U.S. Railroads in the Late 19th Century

By: Daniel P. Gross

Collusion is widely condemned for its negative effects on consumer welfare and market efficiency. In this paper, I show that collusion may also in some cases facilitate the creation of unexpected new sources of value. I bring this possibility into focus through the... View Details

Keywords: Collusion; Compatibility; Railroads; Rail Transportation; Standards; Integration; Trade; History; United States

SSRN

January 2022
Teaching Plan

Just Arrived: Integrating Refugees in Sweden

By: Brian Trelstad and Emilie Billaud

Teaching Plan for HBS Case No. 321-040. Just Arrived is an online platform that matches newly-arrived immigrants in Sweden with employment opportunities. As one of several for-profit and non-profit start-ups in Europe that is looking to address the refugee crisis, the... View Details

Keywords: Immigration; Refugees; Employment; Integration; Business Model; Social Entrepreneurship; Growth and Development Strategy; Employment Industry; Sweden; Italy; Germany