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      • June 2021
      • Case

      Mobileye 2021: Robotaxi and/or Consumer AV?

      By: David B. Yoffie, Danielle Golan and Nicole Tempest Keller
      In March 2021, Amnon Shashua, co-founder and CEO of Israel-based Mobileye, was preparing to meet with Intel’s new CEO, Pat Gelsinger, to review plans for the future. Mobileye had been acquired by California-based Intel in 2017, but still operated independently.... View Details
      Keywords: Technology Companies; Robotics; Autonomous Vehicles; Strategy; Decision Making; Transportation; Technological Innovation; Technology Industry; Auto Industry; Transportation Industry; Israel
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      Yoffie, David B., Danielle Golan, and Nicole Tempest Keller. "Mobileye 2021: Robotaxi and/or Consumer AV?" Harvard Business School Case 721-481, June 2021.
      • 2021
      • Working Paper

      Regulatory Approval and Expanded Market Size

      By: Benjamin Berger, Amitabh Chandra and Craig Garthwaite
      Regulatory review of new medicines is often viewed as a hindrance to innovation by increasing the hurdle to bring products to market. However, a more complete accounting of regulation must also account for its potential market expanding effects through quality... View Details
      Keywords: New Medicines; Regulatory Approval; Health Care and Treatment; Research and Development; Governing Rules, Regulations, and Reforms; Markets; Expansion; Pharmaceutical Industry
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      Berger, Benjamin, Amitabh Chandra, and Craig Garthwaite. "Regulatory Approval and Expanded Market Size." NBER Working Paper Series, No. 28889, June 2021.
      • 2021
      • Working Paper

      The Great Unequalizer: Initial Health Effects of COVID-19 in the United States

      By: Marcella Alsan, Amitabh Chandra and Kosali I. Simon
      We measure inequities from the COVID-19 pandemic on mortality and hospitalizations in the United States during the early months of the outbreak. We discuss challenges in measuring health outcomes and health inequality, some of which are specific to COVID-19 and others... View Details
      Keywords: COVID-19; Health Inequality; Health Pandemics; Demographics; Equality and Inequality
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      Alsan, Marcella, Amitabh Chandra, and Kosali I. Simon. "The Great Unequalizer: Initial Health Effects of COVID-19 in the United States." NBER Working Paper Series, No. 28958, June 2021.
      • Article

      Diversity and Team Performance in a Kenyan Organization

      By: Benjamin Marx, Vincent Pons and Tavneet Suri
      We present the results from a field experiment on team diversity. Individuals working as door-to-door canvassers for a non-profit organization were randomly assigned a teammate, a supervisor, and a list of individuals to canvass. This created random variation within... View Details
      Keywords: Ethnic Diversity; Organizational Behavior; Labor Management; Groups and Teams; Diversity; Performance
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      Marx, Benjamin, Vincent Pons, and Tavneet Suri. "Diversity and Team Performance in a Kenyan Organization." Art. 104332. Journal of Public Economics 197 (May 2021).
      • 2021
      • Working Paper

      Going by the Book: Valuation Ratios and Stock Returns

      By: Ki-Soon Choi, Eric So and Charles C.Y. Wang
      We study the use of firms’ book-to-market ratios (B/M) in value investing and its implications for comovements in firms’ stock returns and trading volumes. We show B/M has become increasingly detached from common alternative valuation ratios over time while also... View Details
      Keywords: Valuation Ratios; Book-to-market Ratios; Investment Return; Investment; Decision Making
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      Choi, Ki-Soon, Eric So, and Charles C.Y. Wang. "Going by the Book: Valuation Ratios and Stock Returns." Harvard Business School Working Paper, No. 21-126, May 2021.
      • May 2021
      • Article

      The Firm Next Door: Using Satellite Images to Study Local Information Advantage

      By: Jung Koo Kang, Lorien Stice-Lawrence and Forester Wong
      We use novel satellite data that track the number of cars in the parking lots of 92,668 stores for 71 publicly listed U.S. retailers to study the local information advantage of institutional investors. We establish car counts as a timely measure of store-level... View Details
      Keywords: Satellite Images; Store-level Performance; Institutional Investors; Local Advantage; Overweighting; Processing Costs; Alternative Data; Big Data; Emerging Technologies; Information; Quality; Institutional Investing; Decision Making; Behavioral Finance; Analytics and Data Science
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      Kang, Jung Koo, Lorien Stice-Lawrence, and Forester Wong. "The Firm Next Door: Using Satellite Images to Study Local Information Advantage." Journal of Accounting Research 59, no. 2 (May 2021): 713–750.
      • April 2021 (Revised December 2023)
      • Case

      The Mahindra Group: Leading with Purpose

      By: Ranjay Gulati and Rachna Tahilyani
      India headquartered Mahindra Group is a multibillion-dollar federation of companies operating across the globe. It is ahead of its time in articulating its purpose and mapping its values, something it had first done at inception and then refreshed yet again as ‘Rise’... View Details
      Keywords: Mission and Purpose; Organizational Culture; Change Management; Communication Strategy; Family Ownership; Corporate Social Responsibility and Impact; Revenue; Auto Industry; Financial Services Industry; Manufacturing Industry; Technology Industry; Asia; India; Mumbai; South Korea; Italy; United States
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      Gulati, Ranjay, and Rachna Tahilyani. "The Mahindra Group: Leading with Purpose." Harvard Business School Case 421-091, April 2021. (Revised December 2023.)
      • April 2021 (Revised July 2021)
      • Case

      StockX: The Stock Market of Things (Abridged)

      By: Chiara Farronato, John J. Horton, Annelena Lobb and Julia Kelley
      Founded in 2015 by Dan Gilbert, Josh Luber, and Greg Schwartz, StockX was an online platform where users could buy and sell unworn luxury and limited-edition sneakers. Sneaker resale prices often fluctuated over time based on supply and demand, creating a robust... View Details
      Keywords: Markets; Auctions; Bids and Bidding; Demand and Consumers; Consumer Behavior; Analytics and Data Science; Market Design; Digital Platforms; Market Transactions; Marketplace Matching; Supply and Industry; Analysis; Price; Product Marketing; Product Launch; Apparel and Accessories Industry; Fashion Industry; North and Central America; United States; Michigan; Detroit
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      Farronato, Chiara, John J. Horton, Annelena Lobb, and Julia Kelley. "StockX: The Stock Market of Things (Abridged)." Harvard Business School Case 621-107, April 2021. (Revised July 2021.)
      • April 2021
      • Article

      Evaluating Firm-Level Expected-Return Proxies: Implications for Estimating Treatment Effects

      By: Charles M.C. Lee, Eric C. So and Charles C.Y. Wang
      We introduce a parsimonious framework for choosing among alternative expected-return proxies (ERPs) when estimating treatment effects. By comparing ERPs’ measurement-error variances in the cross section and in time series, we provide new evidence on the relative... View Details
      Keywords: Implied Cost Of Capital; Expected Returns; Cost of Capital; Investment Return; Performance Evaluation
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      Lee, Charles M.C., Eric C. So, and Charles C.Y. Wang. "Evaluating Firm-Level Expected-Return Proxies: Implications for Estimating Treatment Effects." Review of Financial Studies 34, no. 4 (April 2021): 1907–1951.
      • 2021
      • Book

      Glass Half-Broken: Shattering the Barriers That Still Hold Women Back at Work

      By: Colleen Ammerman and Boris Groysberg
      Why does the gender gap persist and how can we close it? For years women have made up the majority of college-educated workers in the United States. In 2019, the gap between the percentage of women and the percentage of men in the workforce was the smallest on record.... View Details
      Keywords: Women; Career; Gender Gap; Glass Ceiling; Gender; Employment; Personal Development and Career; Equality and Inequality; Organizational Culture; Diversity; Management; Strategy
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      Ammerman, Colleen, and Boris Groysberg. Glass Half-Broken: Shattering the Barriers That Still Hold Women Back at Work. Boston: Harvard Business Review Press, 2021.
      • 2021
      • Working Paper

      Time Dependency, Data Flow, and Competitive Advantage

      By: Ehsan Valavi, Joel Hestness, Marco Iansiti, Newsha Ardalani, Feng Zhu and Karim R. Lakhani
      Data is fundamental to machine learning-based products and services and is considered strategic due to its externalities for businesses, governments, non-profits, and more generally for society. It is renowned that the value of organizations (businesses, government... View Details
      Keywords: Economics Of AI; Value Of Data; Perishability; Time Dependency; Flow Of Data; Data Strategy; Analytics and Data Science; Value; Strategy; Competitive Advantage
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      Valavi, Ehsan, Joel Hestness, Marco Iansiti, Newsha Ardalani, Feng Zhu, and Karim R. Lakhani. "Time Dependency, Data Flow, and Competitive Advantage." Harvard Business School Working Paper, No. 21-099, March 2021.
      • Article

      A Multicountry Perspective on Gender Differences in Time Use During COVID-19

      By: Laura M. Giurge, Ashley V. Whillans and Ayse Yemiscigil (shared authorship)
      The COVID-19 pandemic has fundamentally altered how people spend time, with possible consequences for subjective well-being. Using diverse samples of remote workers from the United States, Canada, Denmark, Brazil, and Spain (n = 31,141), following a preregistered... View Details
      Keywords: Time; Subjective Well-being; COVID-19; Health Pandemics; Gender; Time Management; Well-being; Work-Life Balance; Global Range
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      Giurge, Laura M., Ashley V. Whillans, and Ayse Yemiscigil (shared authorship). "A Multicountry Perspective on Gender Differences in Time Use During COVID-19." Proceedings of the National Academy of Sciences 118, no. 12 (March 23, 2021).
      • Article

      A Feasibility Study Using Time-driven Activity-based Costing as a Management Tool for Provider Cost Estimation: Lessons from the National TB Control Program in Zimbabwe in 2018

      By: J. Chirenda, B. Nhlema Simwaka, C. Sandy, K. Bodnar, S. Corbin, P. Desai, T. Mapako, S. Shamu, C. Timire, E. Antonio, A. Makone, A. Birikorang, T. Mapuranga, M. Ngwenya, T. Masunda, M. Dube, E. Wandwalo, L. Morrison and R. S. Kaplan
      Background: This study used process maps and time-driven activity-based costing to document TB service delivery processes. The analysis identified the resources required to sustain TB services in Zimbabwe, as well as several opportunities for more effective and... View Details
      Keywords: Time-Driven Activity-Based Costing; Provider Cost; Health Care and Treatment; Cost Management; Activity Based Costing and Management; Zimbabwe
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      Chirenda, J., B. Nhlema Simwaka, C. Sandy, K. Bodnar, S. Corbin, P. Desai, T. Mapako, S. Shamu, C. Timire, E. Antonio, A. Makone, A. Birikorang, T. Mapuranga, M. Ngwenya, T. Masunda, M. Dube, E. Wandwalo, L. Morrison, and R. S. Kaplan. "A Feasibility Study Using Time-driven Activity-based Costing as a Management Tool for Provider Cost Estimation: Lessons from the National TB Control Program in Zimbabwe in 2018." BMC Health Services Research 21, no. 242 (2021).
      • March 16, 2021
      • Article

      From Driverless Dilemmas to More Practical Commonsense Tests for Automated Vehicles

      By: Julian De Freitas, Andrea Censi, Bryant Walker Smith, Luigi Di Lillo, Sam E. Anthony and Emilio Frazzoli
      For the first time in history, automated vehicles (AVs) are being deployed in populated environments. This unprecedented transformation of our everyday lives demands a significant undertaking: endowing complex autonomous systems with ethically acceptable behavior. We... View Details
      Keywords: Automated Driving; Public Health; Artificial Intelligence; Transportation; Health; Ethics; Policy; AI and Machine Learning
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      De Freitas, Julian, Andrea Censi, Bryant Walker Smith, Luigi Di Lillo, Sam E. Anthony, and Emilio Frazzoli. "From Driverless Dilemmas to More Practical Commonsense Tests for Automated Vehicles." Proceedings of the National Academy of Sciences 118, no. 11 (March 16, 2021).
      • March 2021 (Revised July 2021)
      • Case

      Resident

      By: Jeffrey F. Rayport and Thomas O. Jones
      Launched in 2016, Resident was a leading player in the direct-to-consumer bed-in-a-box mattress market, where it was one of at least 175 venture-backed companies competing in the space. By late 2020, it had realized over $500 million in revenue, profitability in the... View Details
      Keywords: Digital Marketing; Business Growth and Maturation; Operations; Entrepreneurship; Competitive Strategy; Initial Public Offering; Decisions; Marketing Strategy; Cash Flow; Demand and Consumers
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      Rayport, Jeffrey F., and Thomas O. Jones. "Resident." Harvard Business School Case 821-090, March 2021. (Revised July 2021.)
      • March 2021
      • Supplement

      Snapp: Scaling Under Sanctions in Iran (B)

      By: Meg Rithmire and Gamze Yucaoglu
      The case opens in November 2020 as Eyad Alkassar and Mahmoud Fouz, co-founders of Iran’s first and leading ride-hailing platform, Snapp, eagerly await the results of the U.S. presidential elections.
      The case takes us through the challenging times between... View Details
      Keywords: Sanctions; Change Management; Disruption; Volatility; Decision Choices and Conditions; Cross-Cultural and Cross-Border Issues; Government and Politics; International Relations; National Security; Crisis Management; Risk Management; Health Pandemics; Transportation Industry; Middle East; Iran
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      Rithmire, Meg, and Gamze Yucaoglu. "Snapp: Scaling Under Sanctions in Iran (B)." Harvard Business School Supplement 721-036, March 2021.
      • March 2021
      • Article

      A Diplomatic Counterrevolution: Indonesian Diplomacy and the Invasion of East Timor

      By: Mattias Fibiger
      This article reinterprets the Indonesian invasion of East Timor as a "diplomatic counterrevolution." Using the central archival records of the Suharto regime for the first time in English-language scholarship, it argues that Indonesian diplomats pursued diplomacy in... View Details
      Keywords: Diplomacy; Geopolitics; History; Globalization; Indonesia; Timor-Leste
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      Fibiger, Mattias. "A Diplomatic Counterrevolution: Indonesian Diplomacy and the Invasion of East Timor." Modern Asian Studies 55, no. 2 (March 2021): 587–628.
      • 2021
      • Working Paper

      First Law of Motion: Influencer Video Advertising on TikTok

      By: Jeremy Yang, Juanjuan Zhang and Yuhan Zhang
      This paper engineers an intuitive feature that is predictive of the causal effect of influencer video advertising on product sales. We propose the concept of m-score, a summary statistic that captures the extent to which a product is advertised in the most engaging... View Details
      Keywords: Influencer Advertising; Video Advertising; Computer Vision; Machine Learning; Advertising; Online Technology
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      Yang, Jeremy, Juanjuan Zhang, and Yuhan Zhang. "First Law of Motion: Influencer Video Advertising on TikTok." Working Paper, March 2021.
      • 2021
      • Working Paper

      How Much Should We Trust Staggered Difference-In-Differences Estimates?

      By: Andrew C. Baker, David F. Larcker and Charles C.Y. Wang
      Difference-in-differences analysis with staggered treatment timing is frequently used to assess the impact of policy changes on corporate outcomes in academic research. However, recent advances in econometric theory show that such designs are likely to be biased in the... View Details
      Keywords: Difference In Differences; Staggered Difference-in-differences Designs; Generalized Difference-in-differences; Dynamic Treatment Effects; Mathematical Methods
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      Baker, Andrew C., David F. Larcker, and Charles C.Y. Wang. "How Much Should We Trust Staggered Difference-In-Differences Estimates?" European Corporate Governance Institute Finance Working Paper, No. 736/2021, February 2021. (Harvard Business School Working Paper, No. 21-112, April 2021.)
      • March 2021
      • Article

      Last Place Aversion in Queues

      By: Ryan W. Buell
      This paper documents the effects of last place aversion in queues and its implications for customer experiences and behaviors as well as for operating performance. An observational analysis of customers queuing at a grocery store, and four online studies in which... View Details
      Keywords: Behavioral Operations; Queues; Reference Effects; Last Place Aversion; Transparency; Customers; Behavior; Satisfaction; Service Operations
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      Buell, Ryan W. "Last Place Aversion in Queues." Management Science 67, no. 3 (March 2021): 1430–1452.
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