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Publications

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    • All HBS Web  (913)
      • Faculty Publications  (43)

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      • January 2025
      • Article

      Communication Within Firms: Evidence from CEO Turnovers

      By: Stephen Michael Impink, Andrea Prat and Raffaella Sadun
      This paper uses novel, firm-level communication measures derived from communications metadata several months before and after a CEO transition for 102 firms to study whether and how this organizational event is reflected in employees’ communication flows. We find that... View Details
      Keywords: Information; Communication; Management Succession; Organizational Change and Adaptation; Alignment
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      Impink, Stephen Michael, Andrea Prat, and Raffaella Sadun. "Communication Within Firms: Evidence from CEO Turnovers." Management Science 71, no. 1 (January 2025): 470–487.
      • 2025
      • Working Paper

      Lessons from an App Update at Replika AI: Identity Discontinuity in Human-AI Relationships

      By: Julian De Freitas, Noah Castelo, Ahmet K. Uğuralp and Zeliha O. Uğuralp
      As consumers increasingly interact with AI applications specialized for social relationships, what is the nature and depth of these relationships among actual users, and can company actions influence these dynamics? We find that active users of the US-based AI... View Details
      Keywords: AI and Machine Learning; Welfare; Loss; Well-being; Identity; Perception; Relationships
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      De Freitas, Julian, Noah Castelo, Ahmet K. Uğuralp, and Zeliha O. Uğuralp. "Lessons from an App Update at Replika AI: Identity Discontinuity in Human-AI Relationships." Harvard Business School Working Paper, No. 25-018, October 2024. (Revised May 2025.)
      • 2024
      • Working Paper

      Changing Perceptions and Post-Pandemic Monetary Policy

      By: Michael D. Bauer, Carolin Pflueger and Adi Sunderam
      We document that the Fed’s perceived monetary policy response to inflation shifted materially over the post-pandemic period. In forward-looking policy rules estimated from surveys of macroeconomic forecasters, the inflation coefficient rose significantly after liftoff... View Details
      Keywords: Policy; Inflation and Deflation; Interest Rates; Perception; Government Administration
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      Bauer, Michael D., Carolin Pflueger, and Adi Sunderam. "Changing Perceptions and Post-Pandemic Monetary Policy." Working Paper, September 2024.
      • 2024
      • Working Paper

      Social Movements and Public Opinion in the United States

      By: Amory Gethin and Vincent Pons
      Recent social movements stand out by their spontaneous nature and lack of stable leadership, raising doubts on their ability to generate political change. This article provides systematic evidence on the effects of protests on public opinion and political attitudes.... View Details
      Keywords: Attitudes; Social Issues; Voting; Public Opinion; Social Media
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      Gethin, Amory, and Vincent Pons. "Social Movements and Public Opinion in the United States." NBER Working Paper Series, No. 32342, April 2024.
      • 2024
      • Working Paper

      Age at Immigrant Arrival and Career Mobility: Evidence from Vietnamese Refugee Migration and the Amerasian Homecoming Act

      By: Sari Pekkala Kerr, William R. Kerr and Kendall Smith
      We study the long-run career mobility of young immigrants, mostly refugees, from Vietnam who moved to the United States during 1989-1995. This third and final migration wave of young Vietnamese immigrants was sparked by unexpected events that culminated in the... View Details
      Keywords: Vietnam; Vietnam War; Assimilation; Immigration; Refugees; Age; Outcome or Result; Personal Development and Career; Viet Nam
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      Kerr, Sari Pekkala, William R. Kerr, and Kendall Smith. "Age at Immigrant Arrival and Career Mobility: Evidence from Vietnamese Refugee Migration and the Amerasian Homecoming Act." Harvard Business School Working Paper, No. 24-044, January 2024.
      • 2024
      • Working Paper

      What Do Impact Investors Do Differently?

      By: Shawn Cole, Leslie Jeng, Josh Lerner, Natalia Rigol and Benjamin N. Roth
      In recent years, impact investors – private investors who seek to generate simultaneously financial and social returns – have attracted intense interest and controversy. We analyze a novel, comprehensive data set of impact and traditional investors to assess how the... View Details
      Keywords: ESG; Socially Responsible Investing; Investment Decisions; Public Goods; Impact Investment; Investment; Private Equity; Venture Capital
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      Cole, Shawn, Leslie Jeng, Josh Lerner, Natalia Rigol, and Benjamin N. Roth. "What Do Impact Investors Do Differently?" Harvard Business School Working Paper, No. 24-028, November 2023.
      • May 2023
      • Article

      How Do Campaigns Shape Vote Choice? Multi-Country Evidence from 62 Elections and 56 TV Debates

      By: Caroline Le Pennec and Vincent Pons
      We use two-round survey data from 62 elections in 10 countries since 1952 to study the formation of vote choice, beliefs, and policy preferences and assess how televised debates contribute to this process. Our data include 253,000 observations. We compare the... View Details
      Keywords: Political Debates; TV Debates; Voting; Political Elections; Decision Choices and Conditions
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      Le Pennec, Caroline, and Vincent Pons. "How Do Campaigns Shape Vote Choice? Multi-Country Evidence from 62 Elections and 56 TV Debates." Quarterly Journal of Economics 138 (May 2023): 703–767.
      • May 2022
      • Article

      The Impact of COVID-19 on Digital Communication Patterns

      By: Evan DeFilippis, Stephen Michael Impink, Madison Singell, Jeff Polzer and Raffaella Sadun
      We explore the impact of COVID-19 on employees’ digital communication patterns through an event study of lockdowns in 16 large metropolitan areas in North America, Europe, and the Middle East. Using de-identified, aggregated meeting and email meta-data from 3,143,270... View Details
      Keywords: Meetings; Email; COVID-19 Pandemic; Communication Technology; Health Pandemics; Time Management
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      DeFilippis, Evan, Stephen Michael Impink, Madison Singell, Jeff Polzer, and Raffaella Sadun. "The Impact of COVID-19 on Digital Communication Patterns." Humanities and Social Sciences Communications 9, no. 180 (May 2022).
      • May 2022
      • Article

      Coins for Bombs: The Predictive Ability of On-Chain Transfers for Terrorist Attacks

      By: Dan Amiram, Evgeny Lyandres and Daniel Rabetti
      This study examines whether we can learn from the behavior of blockchain-based transfers to predict the financing of terrorist attacks. We exploit blockchain transaction transparency to map millions of transfers for hundreds of large on-chain service providers. The... View Details
      Keywords: Blockchain; Bitcoin; Accounting; AI and Machine Learning; National Security; Governing Rules, Regulations, and Reforms
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      Amiram, Dan, Evgeny Lyandres, and Daniel Rabetti. "Coins for Bombs: The Predictive Ability of On-Chain Transfers for Terrorist Attacks." Journal of Accounting Research 60, no. 2 (May 2022): 427–466.
      • February 2022
      • Article

      Sugar-sweetened Beverage Purchases and Intake at Event Arenas with and without a Portion Size Cap

      By: Sheri Volger, James Scott Parrott, Brian Elbel, Leslie K. John, Jason P. Block, Pamela Rothpletz-Puglia and Christina A. Roberto
      This is the first real-world study to examine the association between a voluntary 16-ounce (oz.) portion-size cap on sugar-sweetened beverages (SSB) at a sporting arena on volume of SSBs and food calories purchased and consumed during basketball games. Cross-sectional... View Details
      Keywords: Sugar-sweetened Beverages; Nutrition Policy; Obesity Prevention; Portion Sizes; Nutrition; Policy; Health; Behavior
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      Volger, Sheri, James Scott Parrott, Brian Elbel, Leslie K. John, Jason P. Block, Pamela Rothpletz-Puglia, and Christina A. Roberto. "Sugar-sweetened Beverage Purchases and Intake at Event Arenas with and without a Portion Size Cap." Art. 101661. Preventative Medicine Reports 25 (February 2022).
      • 2021
      • Working Paper

      Does Social Media Cause Polarization? Evidence from Access to Twitter Echo Chambers during the 2019 Argentine Presidential Debate

      By: Rafael Di Tella, Ramiro H. Gálvez and Ernesto Schargrodsky
      We study how two groups, those inside vs. those outside echo chambers, react to a political event when we vary social media status (Twitter). Our treatments mimic two strategies often suggested as a way to limit polarization on social media: they expose people to... View Details
      Keywords: Political Polarization; Political Elections; Internet and the Web; Attitudes; Social Media; Argentina
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      Di Tella, Rafael, Ramiro H. Gálvez, and Ernesto Schargrodsky. "Does Social Media Cause Polarization? Evidence from Access to Twitter Echo Chambers during the 2019 Argentine Presidential Debate." NBER Working Paper Series, No. 29458, November 2021.
      • 2020
      • Working Paper

      An Executive Order Worth $100 Billion: The Impact of an Immigration Ban's Announcement on Fortune 500 Firms' Valuation

      By: Dany Bahar, Prithwiraj Choudhury and Britta Glennon
      On June 22, 2020, President Trump issued an Executive Order (EO) that suspended new work visas, barring nearly 200,000 foreign workers and their dependents from entering the United States and preventing American companies from hiring skilled immigrants using H-1B or L1... View Details
      Keywords: Visa; Foreign Workers; Fortune 500; Immigration; Policy; System Shocks; Business Ventures; Valuation
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      Bahar, Dany, Prithwiraj Choudhury, and Britta Glennon. "An Executive Order Worth $100 Billion: The Impact of an Immigration Ban's Announcement on Fortune 500 Firms' Valuation." Harvard Business School Working Paper, No. 21-055, October 2020.
      • 2020
      • Working Paper

      Reinventing Retail: The Novel Resurgence of Independent Bookstores

      By: Ryan Raffaelli
      This study examines how community-based brick-and-mortar retailers can achieve sustained market growth in the face of online and big box retail competition. The appearance of Amazon.com in 1995 led to a significant decline in the number of independent bookstores in the... View Details
      Keywords: Bookstores; Competitive Strategy; Business and Community Relations; Customization and Personalization; Growth and Development; Retail Industry; United States
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      Raffaelli, Ryan. "Reinventing Retail: The Novel Resurgence of Independent Bookstores." Harvard Business School Working Paper, No. 20-068, January 2020.
      • March 2019
      • Article

      Crime and Violence: Desensitization in Victims to Watching Criminal Events

      By: Rafael Di Tella, Lucia Freira, Ramiro H. Gálvez, Ernesto Schargrodsky, Diego Shalom and Mariano Sigman
      We study desensitization to crime in a lab experiment by showing footage of criminal acts to a group of subjects, some of whom have been previously victimized. We measure biolog­ical markers of stress and behavioral indices of cognitive control before and after treated... View Details
      Keywords: Crime; Biological Markers; Experiment; Victimization; Desensitization; Crime and Corruption; Behavior
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      Di Tella, Rafael, Lucia Freira, Ramiro H. Gálvez, Ernesto Schargrodsky, Diego Shalom, and Mariano Sigman. "Crime and Violence: Desensitization in Victims to Watching Criminal Events." Journal of Economic Behavior & Organization 159 (March 2019): 613–625.
      • August 2018
      • Case

      Christine Lagarde (A): A French Prime Minister Calls

      By: Julie Battilana and Carin-Isabel Knoop
      This case covers formative events and influences in Christine Lagarde’s childhood and her trajectory from studying political science and law to heading the world’s largest law firm. As she prepares to transition back to practice in 2005, the new Prime Minister of... View Details
      Keywords: Personal Development and Career; Power and Influence; Decision Making
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      Battilana, Julie, and Carin-Isabel Knoop. "Christine Lagarde (A): A French Prime Minister Calls." Harvard Business School Case 419-017, August 2018.
      • Article

      The Economic Consequences of Hospital Admissions

      By: Carlos Dobkin, Amy Finkelstein, Raymond Kluender and Matthew Notowidigdo
      We use an event study approach to examine the economic consequences of hospital admissions for adults in two datasets: survey data from the Health and Retirement Study, and hospitalization data linked to credit reports. For non-elderly adults with health insurance,... View Details
      Keywords: Personal Finance; Borrowing and Debt; Insurance; Insolvency and Bankruptcy; Health Care and Treatment
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      Dobkin, Carlos, Amy Finkelstein, Raymond Kluender, and Matthew Notowidigdo. "The Economic Consequences of Hospital Admissions." American Economic Review 108, no. 2 (February 2018): 308–352.
      • Article

      Your Visual System Provides All the Information You Need to Make Moral Judgments about Generic Visual Events

      By: Julian De Freitas and George A. Alvarez
      To what extent are people's moral judgments susceptible to subtle factors of which they are unaware? Here we show that we can change people’s moral judgments outside of their awareness by subtly biasing perceived causality. Specifically, we used subtle visual... View Details
      Keywords: Moral Judgment; Perceived Causality; Visual Illusions; Moral Sensibility; Judgments
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      De Freitas, Julian, and George A. Alvarez. "Your Visual System Provides All the Information You Need to Make Moral Judgments about Generic Visual Events." Cognition 178 (September 2018): 133–146.
      • 2017
      • Working Paper

      Crime and Violence: Desensitization in Victims to Watching Criminal Events

      By: Rafael Di Tella, Lucía Freira, Ramiro H. Gálvez, Ernesto Schargrodsky, Diego Shalom and Mariano Sigman
      We study desensitization to crime in a lab experiment by showing footage of criminal acts to a group of subjects, some of whom have been previously victimized. We measure biological markers of stress and behavioral indices of cognitive control before and after treated... View Details
      Keywords: Crime; Biological Markers; Experiment; Victimization; Desensitization; Crime and Corruption; Perspective; Attitudes; Behavior
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      Di Tella, Rafael, Lucía Freira, Ramiro H. Gálvez, Ernesto Schargrodsky, Diego Shalom, and Mariano Sigman. "Crime and Violence: Desensitization in Victims to Watching Criminal Events." Harvard Business School Working Paper, No. 18-039, October 2017.
      • 2017
      • Working Paper

      Crime and Violence: Desensitization in Victims to Watching Criminal Events

      By: Rafael Di Tella, Lucia Freira, Ramiro H. Gálvez, Ernesto Schargrodsky, Diego Shalom and Mariano Sigman
      We study desensitization to crime in a lab experiment by showing footage of criminal acts to a group of subjects, some of whom have been previously victimized. We measure biological markers of stress and behavioral indices of cognitive control before and after treated... View Details
      Keywords: Crime and Corruption; Attitudes; Perspective; Behavior
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      Di Tella, Rafael, Lucia Freira, Ramiro H. Gálvez, Ernesto Schargrodsky, Diego Shalom, and Mariano Sigman. "Crime and Violence: Desensitization in Victims to Watching Criminal Events." NBER Working Paper Series, No. 23697, August 2017.
      • July 2017 (Revised September 2017)
      • Case

      Donald Trump Calls Carrier Corporation

      By: Andy Zelleke and Brian Tilley
      This case examines the influence of political pressure on corporate decision-making. It questions whether fidelity to domestic operations ought to be a corporate social responsibility, and thus it challenges the limits of “social responsibility” as a corporate ideal.... View Details
      Keywords: Corporate Social Responsibility; Board Decisions; Political Influence; Layoffs; Offshoring And Outsourcing; Manufacturing; United States; Mexico; Governing and Advisory Boards; Decision Making; Job Cuts and Outsourcing; Political Elections; Corporate Social Responsibility and Impact; Corporate Governance; Technology Industry; Manufacturing Industry; Connecticut; Indiana; Mexico
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      Zelleke, Andy, and Brian Tilley. "Donald Trump Calls Carrier Corporation." Harvard Business School Case 318-030, July 2017. (Revised September 2017.)
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