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      • Faculty Publications  (253)

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      • March 2022 (Revised April 2022)
      • Case

      Pittsburgh: A Successful City?

      By: Karen Mills, Caroline Elkins, Vikram Gandhi, Gabriella Elanbeck and Zeke Gillman
      Pittsburgh, PA, was once the crown jewel of American heavy industry. During the 19th and 20th centuries, the city was an undisputed leader in steel production, boasting some of the largest companies and wealthiest individuals in the world. Its abundance of...  View Details
      Keywords: Economic And Social Disparities; Economic Development; Local Economic Development; Contextual Intelligence; Contextual Knowledge; Context; City Growth; City Innovation; City Leadership; Pittsburgh; Local Government; Local Stakeholders; Business And Community; Business And Community Relations; Community Engagement; Community Relations; Cross-sector Collaboration; Innovation; Innovation Economy; Innovation Clusters; Innovation Ecosystems; Shared Prosperity; Equality Of Opportunity; Equity; Inclusion; Business And Government; Business & Government Relations; Business And Government Relations; Business And Society; Neighborhoods; Race And Ethnicity; Innovation & Entrepreneurship; Diversity; Ethnicity; Race; Household; Income; Economic Growth; Economic Sectors; Economics; Local Range; Urban Development; Urban Scope; City; Cross-Cultural and Cross-Border Issues; Government and Politics; Government Administration; Growth and Development; History; Leadership; Goals and Objectives; Philanthropy and Charitable Giving; Society; Civil Society or Community; Culture; Human Needs; Public Opinion; Public Sector; Social Issues; Poverty; Equality and Inequality; Manufacturing Industry; Steel Industry; Education Industry; Medical Devices and Supplies Industry; Technology Industry; United States; Pittsburgh; Pennsylvania
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      Mills, Karen, Caroline Elkins, Vikram Gandhi, Gabriella Elanbeck, and Zeke Gillman. "Pittsburgh: A Successful City?" Harvard Business School Case 322-080, March 2022. (Revised April 2022.)
      • Article

      Expected Stock Returns Worldwide: A Log-Linear Present-Value Approach

      By: Akash Chattopadhyay, Matthew R. Lyle and Charles C.Y. Wang
      This study provides the first large-scale study of the performance of expected-return proxies (ERPs) internationally. Analyst-forecast-based ICCs are sparsely populated and not robustly associated with future returns. Earnings-model-forecast-based ICCs are...  View Details
      Keywords: Expected Returns; Discount Rates; Fundamental Valuation; Implied Cost Of Capital; International Equity Markets; Present Value; Investment Return; Equity; Markets; Global Range
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      Chattopadhyay, Akash, Matthew R. Lyle, and Charles C.Y. Wang. "Expected Stock Returns Worldwide: A Log-Linear Present-Value Approach." Accounting Review 97, no. 2 (March 2022): 107–133.
      • Article

      From Immigrants to Americans: Race and Assimilation During the Great Migration

      By: Vasiliki Fouka, Soumyajit Mazumder and Marco Tabellini
      How does the arrival of a new minority group affect the social acceptance and outcomes of existing minorities? We study this question in the context of the First Great Migration. Between 1915 and 1930, 1.5 million African Americans moved from the U.S. South to Northern...  View Details
      Keywords: Assimilation; Great Migration; Group Identity; Immigration; Race; History; United States
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      Fouka, Vasiliki, Soumyajit Mazumder, and Marco Tabellini. "From Immigrants to Americans: Race and Assimilation During the Great Migration." Review of Economic Studies 89, no. 2 (March 2022): 811–842. (Also appears in VoxEU, The New York Times, Broadstreet, the Skepticast, and Oxford University Press Blog.)
      • Article

      Policies to Influence Perceptions about COVID-19 Risk: The Case of Maps

      By: Claudia Engel, Jonathan Rodden and Marco Tabellini
      Choropleth disease maps have become an important tool for informing the public about the risks posed by COVID-19. In a survey conducted in the U.S. state of Georgia in June 2020, we randomly assigned respondents to view either of two maps. The first one reported...  View Details
      Keywords: Disease Surveillance; Health Pandemics; Risk and Uncertainty; Perception; Policy
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      Engel, Claudia, Jonathan Rodden, and Marco Tabellini. "Policies to Influence Perceptions about COVID-19 Risk: The Case of Maps." Science Advances 8, no. 11 (March 18, 2022).
      • 2022
      • Article

      Which Corporate ESG News Does the Market React To?

      By: George Serafeim and Aaron Yoon
      Using a dataset that classifies firm-level ESG news as positive and negative, we examine how stock prices react to different types of ESG news. We analyze 111,020 firm-day observations for 3,126 companies and find that prices react only to issues identified as...  View Details
      Keywords: ESG; ESG (Environmental, Social, Governance) Performance; ESG Ratings; Social Capital; Environment; Sustainability; CSR; Stock Price; Stock Market Expectations; Materiality; Market Reaction; Environmental Sustainability; Governance; Social Issues; Performance; News
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      Serafeim, George, and Aaron Yoon. "Which Corporate ESG News Does the Market React To?" Financial Analysts Journal 78, no. 1 (2022): 59–78.
      • 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).
      • January 2022
      • Article

      Global Behaviors, Perceptions, and the Emergence of Social Norms at the Onset of the COVID-19 Pandemic

      By: Lukas Hensel, Marc Witte, Stefano Caria, Thiemo Fetzer, Stefano Fiorin, Friedrich M. Goetz, Margarita Gomez, Johannes Haushofer, Andriy Ivchenko, Gordon T. Kraft-Todd, Elena Reutskaja, Christopher Roth, Erez Yoeli and Jon M. Jachimowicz
      We conducted a large-scale survey covering 58 countries and over 100,000 respondents between late March and early April 2020 to study beliefs and attitudes towards citizens' and governments' responses at the onset of the COVID-19 pandemic. Most respondents reported...  View Details
      Keywords: COVID-19; Government Regulation; Social Norms; Health Pandemics; Governing Rules, Regulations, and Reforms; Behavior; Perception; Global Range; Surveys
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      Hensel, Lukas, Marc Witte, Stefano Caria, Thiemo Fetzer, Stefano Fiorin, Friedrich M. Goetz, Margarita Gomez, Johannes Haushofer, Andriy Ivchenko, Gordon T. Kraft-Todd, Elena Reutskaja, Christopher Roth, Erez Yoeli, and Jon M. Jachimowicz. "Global Behaviors, Perceptions, and the Emergence of Social Norms at the Onset of the COVID-19 Pandemic." Journal of Economic Behavior & Organization 193 (January 2022): 473–496.
      • January 2022
      • Article

      Why Is Corporate Virtue in the Eye of the Beholder? The Case of ESG Ratings

      By: Dane Christensen, George Serafeim and Anywhere Sikochi
      Despite the rising use of environmental, social, and governance (ESG) ratings, there is substantial disagreement across rating agencies regarding what rating to give to individual firms. As what drives this disagreement is unclear, we examine whether a firm’s ESG...  View Details
      Keywords: ESG Ratings; Rating Agency Disagreement; ESG Disclosure; Corporate Social Responsibility; Sustainability; Corporate Social Responsibility and Impact; Environmental Sustainability; Corporate Disclosure
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      Christensen, Dane, George Serafeim, and Anywhere Sikochi. "Why Is Corporate Virtue in the Eye of the Beholder? The Case of ESG Ratings." Accounting Review 97, no. 1 (January 2022): 147–175.
      • December 10, 2021
      • Editorial

      Go Ahead and Ask for More Time on That Deadline

      By: A.V. Whillans
      Unrealistic deadlines don’t help anyone—and yet more often than not, employees avoid asking for extensions even when they know more time would help them do a better job. Through a series of studies with more than 4,000 working adults, the author illustrates how despite...  View Details
      Keywords: Deadlines; Extension Request; Employees; Time Management; Behavior; Perception
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      Whillans, A.V. "Go Ahead and Ask for More Time on That Deadline." Harvard Business Review Digital Articles (December 10, 2021).
      • 2022
      • Working Paper

      ESG: Hyperboles and Reality

      By: George Serafeim
      ESG has rapidly become a household name leading to both confusion about what it means and creating unrealistic expectations about its effects. In this paper, I draw on more than a decade of research to dispel several myths about ESG and provide answers to important...  View Details
      Keywords: ESG; ESG (Environmental, Social, Governance) Performance; ESG Disclosure; ESG Reporting; ESG Ratings; Sustainability; Corporate Social Responsibility and Impact; Environmental Sustainability; Performance; Corporate Disclosure; Reports
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      Serafeim, George. "ESG: Hyperboles and Reality." Harvard Business School Working Paper, No. 22-031, November 2021.
      • November 2021
      • Article

      Ratings, Reviews, and the Marketing of New Products

      By: Itay P. Fainmesser, Dominique Olié Lauga and Elie Ofek
      We study how user-generated content (UGC) about new products impacts a firm's advertising and pricing decisions and the effect on profits and market dynamics. We construct a two-period model where consumers value quality and are heterogeneous in their taste for the new...  View Details
      Keywords: Online Reviews; Product Ratings; Social Networks; Word Of Mouth; Pricing; User-generated Content; Advertising; Product Marketing; Price; Consumer Behavior; Product Positioning
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      Fainmesser, Itay P., Dominique Olié Lauga, and Elie Ofek. "Ratings, Reviews, and the Marketing of New Products." Management Science 67, no. 11 (November 2021): 7023–7045.
      • 2021
      • Working Paper

      Cognitive Uncertainty in Intertemporal Choice

      By: Benjamin Enke and Thomas Graeber
      This paper studies the relevance of cognitive uncertainty – subjective uncertainty over one's utility-maximizing action – for understanding and predicting intertemporal choice. The main idea is that when people are cognitively noisy, such as when a decision is complex,...  View Details
      Keywords: Cognitive Uncertainty; Intertemporal Choice; Cognition and Thinking; Complexity; Decision Choices and Conditions
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      Enke, Benjamin, and Thomas Graeber. "Cognitive Uncertainty in Intertemporal Choice." NBER Working Paper Series, No. 19577, December 2021. (R&R at The Quarterly Journal of Economics.)
      • September–October 2021
      • Article

      Frontiers: Can an AI Algorithm Mitigate Racial Economic Inequality? An Analysis in the Context of Airbnb

      By: Shunyuan Zhang, Nitin Mehta, Param Singh and Kannan Srinivasan
      We study the effect of Airbnb’s smart-pricing algorithm on the racial disparity in the daily revenue earned by Airbnb hosts. Our empirical strategy exploits Airbnb’s introduction of the algorithm and its voluntary adoption by hosts as a quasi-natural experiment. Among...  View Details
      Keywords: Smart Pricing; Pricing Algorithm; Machine Bias; Discrimination; Racial Disparity; Social Inequality; Airbnb Revenue; Revenue; Race; Equality and Inequality; Prejudice and Bias; Price; Mathematical Methods; Accommodations Industry
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      Zhang, Shunyuan, Nitin Mehta, Param Singh, and Kannan Srinivasan. "Frontiers: Can an AI Algorithm Mitigate Racial Economic Inequality? An Analysis in the Context of Airbnb." Marketing Science 40, no. 5 (September–October 2021): 813–820.
      • 2021
      • Working Paper

      Loan Officers Impede Graduation from Microfinance: Strategic Disclosure in a Large Microfinance Institution

      By: Natalia Rigol and Benjamin N. Roth
      One of the most important puzzles in microfinance is the low rate of borrower graduation to larger, more flexible loans. Utilizing observational and experimental data from a large Chilean microfinance institution, we demonstrate that loan officers impede borrower...  View Details
      Keywords: Loan Officers; Strategic Behavior; Strategic Disclosure; Microfinance; Financial Institutions; Financing and Loans
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      Rigol, Natalia, and Benjamin N. Roth. "Loan Officers Impede Graduation from Microfinance: Strategic Disclosure in a Large Microfinance Institution." NBER Working Paper Series, No. 29427, October 2021.
      • September 17, 2021
      • Article

      AI Can Help Address Inequity—If Companies Earn Users' Trust

      By: Shunyuan Zhang, Kannan Srinivasan, Param Singh and Nitin Mehta
      While companies may spend a lot of time testing models before launch, many spend too little time considering how they will work in the wild. In particular, they fail to fully consider how rates of adoption can warp developers’ intent. For instance, Airbnb launched a...  View Details
      Keywords: Artificial Intelligence; Algorithmic Bias; Technological Innovation; Perception; Diversity; Equality and Inequality; Trust; AI and Machine Learning
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      Zhang, Shunyuan, Kannan Srinivasan, Param Singh, and Nitin Mehta. "AI Can Help Address Inequity—If Companies Earn Users' Trust." Harvard Business Review Digital Articles (September 17, 2021).
      • July 2021
      • Article

      Creating Exercise Habits Using Incentives: The Trade-off Between Flexibility and Routinization

      By: John Beshears, Hae Nim Lee, Katherine L. Milkman, Robert Mislavsky and Jessica Wisdom
      Habits involve regular, cue-triggered routines. In a field experiment, we tested whether incentivizing exercise routines—paying participants each time they visit the gym within a planned, daily two-hour window—leads to more persistent exercise than offering flexible...  View Details
      Keywords: Behavior And Behavioral Decision Making; Healthcare; Exercise; Habit; Routine; Health; Behavior; Decision Making
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      Beshears, John, Hae Nim Lee, Katherine L. Milkman, Robert Mislavsky, and Jessica Wisdom. "Creating Exercise Habits Using Incentives: The Trade-off Between Flexibility and Routinization." Management Science 67, no. 7 (July 2021): 4139–4171.
      • July 2021
      • Article

      How Trust and Distrust Shape Perception and Memory

      By: Ann-Christin Posten and Francesca Gino
      Trust is a key ingredient in decision making, as it allows us to rely on the information we receive. Although trust is usually viewed as a positive element of decision making, we suggest that its effects on memory are costly rather than beneficial. Across nine studies...  View Details
      Keywords: Distrust; Memory; Similarity; Misinformation; Trust; Perception; Decision Making
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      Posten, Ann-Christin, and Francesca Gino. "How Trust and Distrust Shape Perception and Memory." Journal of Personality and Social Psychology 121, no. 1 (July 2021): 43–58.
      • July 2021
      • Article

      The Effect of Price on Firm Reputation

      By: Michael Luca and Oren Reshef
      While a business's reputation can affect its pricing, prices can also affect its reputation. To explore the effect of prices on reputation, we investigate daily data on menu prices and online ratings from a large rating and ordering platform. We find that a price...  View Details
      Keywords: Pricing; Reputation Systems; IT Policy And Management; Economics Of Digital Platforms; Business Ventures; Reputation; Price; Consumer Behavior; Analysis
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      Luca, Michael, and Oren Reshef. "The Effect of Price on Firm Reputation." Management Science 67, no. 7 (July 2021).
      • 2021
      • Working Paper

      Accounting for Product Impact in the Oil and Gas Industry

      By: Katie Panella, George Serafeim and Katie Trinh
      We apply the product impact measurement framework of the Impact-Weighted Accounts Initiative (IWAI) in two competitor companies within the oil and gas industry. We design a monetization methodology that allows us to calculate monetary product impact estimates of...  View Details
      Keywords: Product Innovation; Impact; Impact Investing; Impact Measurement; ESG; ESG (Environmental, Social, Governance) Performance; ESG Ratings; Social Corporate Responsibility; Corporate Social Responsibility; Social Impact; Oil; Oil & Gas; Oil And Gas; IWAI; Impact-Weighted Accounts; Product Design; Product Positioning; Society; Environmental Sustainability; Corporate Social Responsibility and Impact; Product
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      Panella, Katie, George Serafeim, and Katie Trinh. "Accounting for Product Impact in the Oil and Gas Industry." Harvard Business School Working Paper, No. 21-140, June 2021.
      • 2021
      • Working Paper

      Accounting for Product Impact in the Pharmaceuticals Industry

      By: Amanda Rischbieth, George Serafeim and Katie Trinh
      We apply the product impact measurement framework of the Impact-Weighted Accounts Initiative (IWAI) in two competitor companies within the pharmaceuticals industry. We design a monetization methodology that allows us to calculate monetary impact estimates of accessible...  View Details
      Keywords: Product Innovation; Impact; Impact Investing; Impact Measurement; ESG; ESG (Environmental, Social, Governance) Performance; ESG Ratings; Social Corporate Responsibility; Corporate Social Responsibility; Social Impact; Pharmaceutical Companies; Pharmaceuticals; IWAI; Product Design; Product Positioning; Society; Environmental Sustainability; Corporate Social Responsibility and Impact; Product; Safety; Pharmaceutical Industry
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      Rischbieth, Amanda, George Serafeim, and Katie Trinh. "Accounting for Product Impact in the Pharmaceuticals Industry." Harvard Business School Working Paper, No. 21-139, June 2021.
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