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    • All HBS Web  (308)
      • Faculty Publications  (26)

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      • 2022
      • Working Paper

      A Linear Panel Model with Heterogeneous Coefficients and Variation in Exposure

      By: Jesse M. Shapiro and Liyang Sun
      Linear panel models featuring unit and time fixed effects appear in many areas of empirical economics. An active literature studies the interpretation of the ordinary least squares estimator of the model, commonly called the two-way fixed effects (TWFE) estimator, in...  View Details
      Keywords: Econometric Models; Mathematical Methods
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      Shapiro, Jesse M., and Liyang Sun. "A Linear Panel Model with Heterogeneous Coefficients and Variation in Exposure." NBER Working Paper Series, No. 29976, April 2022.
      • February 2022
      • Case

      Leading The UK Vaccine Task Force

      By: Amy C. Edmondson and Claudia Pienica
      This case describes the first six months of the UK Vaccine Taskforce, under the leadership of Kate Bingham. With a career spent in the private sector as a biotech investor, Bingham’s appointment within the government was considered unusual. The overarching brief given...  View Details
      Keywords: COVID-19; Vaccine; Government; Health Pandemics; Health Care and Treatment; Science; Innovation and Invention; Groups and Teams; Leadership; Decision Making; Government and Politics; Health; Innovation and Management; Governance; Change; Health Industry; Financial Services Industry; Public Administration Industry; Europe; United Kingdom
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      Edmondson, Amy C., and Claudia Pienica. "Leading The UK Vaccine Task Force." Harvard Business School Case 622-079, February 2022.
      • Article

      A Prescriptive Analytics Framework for Optimal Policy Deployment Using Heterogeneous Treatment Effects

      By: Edward McFowland III, Sandeep Gangarapu, Ravi Bapna and Tianshu Sun
      We define a prescriptive analytics framework that addresses the needs of a constrained decision-maker facing, ex ante, unknown costs and benefits of multiple policy levers. The framework is general in nature and can be deployed in any utility maximizing context, public...  View Details
      Keywords: Prescriptive Analytics; Heterogeneous Treatment Effects; Optimization; Observed Rank Utility Condition (OUR); Between-treatment Heterogeneity; Machine Learning; Decision Making; Analysis; Mathematical Methods
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      McFowland III, Edward, Sandeep Gangarapu, Ravi Bapna, and Tianshu Sun. "A Prescriptive Analytics Framework for Optimal Policy Deployment Using Heterogeneous Treatment Effects." MIS Quarterly 45, no. 4 (December 2021): 1807–1832.
      • November 2021
      • Article

      Panel Experiments and Dynamic Causal Effects: A Finite Population Perspective

      By: Iavor Bojinov, Ashesh Rambachan and Neil Shephard
      In panel experiments, we randomly assign units to different interventions, measuring their outcomes, and repeating the procedure in several periods. Using the potential outcomes framework, we define finite population dynamic causal effects that capture the relative...  View Details
      Keywords: Panel Data; Dynamic Causal Effects; Potential Outcomes; Finite Population; Nonparametric; Mathematical Methods
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      Bojinov, Iavor, Ashesh Rambachan, and Neil Shephard. "Panel Experiments and Dynamic Causal Effects: A Finite Population Perspective." Quantitative Economics 12, no. 4 (November 2021): 1171–1196.
      • 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; Social Media
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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.
      • 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).
      • 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).
      • Article

      Nudging: Progress to Date and Future Directions

      By: John Beshears and Harry Kosowsky
      Nudges influence behavior by changing the environment in which decisions are made, without restricting the menu of options and without altering financial incentives. This paper assesses past empirical research on nudging and provides recommendations for future work in...  View Details
      Keywords: Nudge; Choice Architecture; Behavioral Economics; Behavioral Science; Behavior; Change; Situation or Environment; Decision Choices and Conditions; Decision Making
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      Beshears, John, and Harry Kosowsky. "Nudging: Progress to Date and Future Directions." Organizational Behavior and Human Decision Processes 161, Supplement (November 2020): 3–19.
      • 2020
      • Working Paper

      Targeting for Long-Term Outcomes

      By: Jeremy Yang, Dean Eckles, Paramveer Dhillon and Sinan Aral
      Decision makers often want to target interventions so as to maximize an outcome that is observed only in the long term. This typically requires delaying decisions until the outcome is observed or relying on simple short-term proxies for the long-term outcome. Here we...  View Details
      Keywords: Targeted Marketing; Optimization; Churn Management; Marketing; Customer Relationship Management; Policy; Learning; Outcome or Result
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      Yang, Jeremy, Dean Eckles, Paramveer Dhillon, and Sinan Aral. "Targeting for Long-Term Outcomes." Working Paper, October 2020.
      • August 2020
      • Article

      Workplace Knowledge Flows

      By: Jason Sandvik, Richard Saouma, Nathan Seegert and Christopher Stanton
      We conducted a field experiment in a sales firm to test whether improving knowledge flows between coworkers affects productivity. Our design allows us to compare different management practices and to isolate whether frictions to knowledge transmission primarily reside...  View Details
      Keywords: Knowledge Sharing; Interpersonal Communication; Employees; Performance Productivity; Sales; Motivation and Incentives
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      Sandvik, Jason, Richard Saouma, Nathan Seegert, and Christopher Stanton. "Workplace Knowledge Flows." Quarterly Journal of Economics 135, no. 3 (August 2020): 1635–1680.
      • Article

      Treatment Of Opioid Use Disorder Among Commercially Insured U.S. Adults, 2008–17

      By: Karen Shen, Eric Barrette and Leemore S. Dafny
      There is abundant literature on efforts to reduce opioid prescriptions and misuse, but comparatively little on the treatment provided to people with opioid use disorder (OUD). Using claims data representing 12–15 million nonelderly adults covered through commercial...  View Details
      Keywords: Opioid Treatment; Medication-assisted Treatment; Substance Use Disorder; Private Insurance; Health Disorders; Health Care and Treatment; Insurance; United States
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      Shen, Karen, Eric Barrette, and Leemore S. Dafny. "Treatment Of Opioid Use Disorder Among Commercially Insured U.S. Adults, 2008–17." Health Affairs 39, no. 6 (June 2020): 993–1001.
      • 2020
      • Working Paper

      Anchors Aweigh: Analysis of Anchor Limited Partner Investors in Impact Investment Funds

      By: Shawn A. Cole, T. Robert Zochowski, Fanele Mashwama and Heather McPherson
      This note describes results from a survey of “anchor investors” in impact funds. Anchor investors are described as “generally the first investor to make a substantial capital commitment to a fund,” (according to the Global Impact Investing Network, “GIIN”) and their...  View Details
      Keywords: Impact Investment Funds; Anchor Investors; Investment; Surveys; Analysis
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      Cole, Shawn A., T. Robert Zochowski, Fanele Mashwama, and Heather McPherson. "Anchors Aweigh: Analysis of Anchor Limited Partner Investors in Impact Investment Funds." Working Paper, May 2020.
      • January 2020
      • Article

      The Market Reacts Quickly: Changes in Paclitaxel Vascular Device Purchasing Within the Ascension Healthcare System

      By: Peter P. Monteleone, Subhash Banerjee, Priya Kothapalli, Ariel Dora Stern, Daniel Fehder, Ron Ginor, Dominic Vollmar, Edward T. A. Fry and Mark J. Pirwitz
      Background. A meta-analysis of trials in endovascular therapy suggested an increased mortality associated with treatment exposure to paclitaxel. Multiple publications and corrections of prior data were performed, and the United States Food and Drug Administration has...  View Details
      Keywords: Medical Devices; Health Testing and Trials; Analysis; Sales
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      Monteleone, Peter P., Subhash Banerjee, Priya Kothapalli, Ariel Dora Stern, Daniel Fehder, Ron Ginor, Dominic Vollmar, Edward T. A. Fry, and Mark J. Pirwitz. "The Market Reacts Quickly: Changes in Paclitaxel Vascular Device Purchasing Within the Ascension Healthcare System." Journal of Invasive Cardiology 32, no. 1 (January 2020).
      • 2019
      • Working Paper

      Identification Using Border Approaches and IVs

      By: Xing Li, Wesley R. Hartmann and Tomomichi Amano
      We document that recent quasi-experimental strategies for identifying advertising effects can be derived from a model in which ad decisions are made at a more aggregate level than conversion is measured. Next, we show that the identifying variation in one of these...  View Details
      Keywords: Advertising Effects; Advertising; Decision Making; Political Elections; Analysis
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      Li, Xing, Wesley R. Hartmann, and Tomomichi Amano. "Identification Using Border Approaches and IVs." Working Paper, June 2019.
      • August 28, 2018
      • Article

      How Intermittent Breaks in Interaction Improve Collective Intelligence

      By: Ethan Bernstein, Jesse Shore and David Lazer
      People influence each other when they interact to solve problems. Such social influence introduces both benefits (higher average solution quality due to exploitation of existing answers through social learning) and costs (lower maximum solution quality due to a...  View Details
      Keywords: Transparency; Social Influence; Collective Intelligence; Interaction; Problem Solving; Collaboration; Intermittant; Breaks; Always On; Communication Technologies; Communication; Design; Information; Management; Leadership; Organizational Design; Organizational Structure; Performance; Social and Collaborative Networks; Information Technology
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      Bernstein, Ethan, Jesse Shore, and David Lazer. "How Intermittent Breaks in Interaction Improve Collective Intelligence." Proceedings of the National Academy of Sciences 115, no. 35 (August 28, 2018).
      • Article

      Performance Effects of Setting a High Reference Point for Peer‐Performance Comparison

      By: Henry Eyring and V.G. Narayanan
      We conduct a field experiment, based on a registered report accepted by the Journal of Accounting Research, to test performance effects of setting a high reference point for peer‐performance comparison. Relative to providing the median as a reference point for...  View Details
      Keywords: Relative Performance Evaluation; Reference Points; Social Comparison; Field Experiment; Performance; Performance Evaluation; Education
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      Eyring, Henry, and V.G. Narayanan. "Performance Effects of Setting a High Reference Point for Peer‐Performance Comparison." Journal of Accounting Research 56, no. 2 (May 2018): 581–615.
      • April 2018
      • Article

      The Power of Voice in Stimulating Morality: Eliciting Taxpayer Preferences Increases Tax Compliance

      By: Cait Lamberton, Jan-Emmanuel De Neve and Michael I. Norton
      Decisions about paying taxes represent one of the most common moral quandaries faced by citizens. In the present research, we argue that taxpayer compliance can be raised by increasing “voice”: allowing taxpayers to express non-binding preferences about the way their...  View Details
      Keywords: Morality; Public Policy; Ethics; Moral Sensibility; Taxation; Policy; Attitudes; Governance Compliance
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      Lamberton, Cait, Jan-Emmanuel De Neve, and Michael I. Norton. "The Power of Voice in Stimulating Morality: Eliciting Taxpayer Preferences Increases Tax Compliance." Special Issue on Marketplace Morality. Journal of Consumer Psychology 28, no. 2 (April 2018): 310–328.
      • February 2018
      • Article

      Retention Futility: Targeting High-Risk Customers Might Be Ineffective.

      By: Eva Ascarza
      Companies in a variety of sectors are increasingly managing customer churn proactively, generally by detecting customers at the highest risk of churning and targeting retention efforts towards them. While there is a vast literature on developing churn prediction models...  View Details
      Keywords: Retention/churn; Proactive Churn Management; Field Experiments; Heterogeneous Treatment Effect; Machine Learning; Customer Relationship Management; Risk Management
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      Ascarza, Eva. "Retention Futility: Targeting High-Risk Customers Might Be Ineffective." Journal of Marketing Research (JMR) 55, no. 1 (February 2018): 80–98.
      • 2018
      • Working Paper

      Efficient Discovery of Heterogeneous Treatment Effects in Randomized Experiments via Anomalous Pattern Detection

      By: Edward McFowland III, Sriram Somanchi and Daniel B. Neill
      In the recent literature on estimating heterogeneous treatment effects, each proposed method makes its own set of restrictive assumptions about the intervention’s effects and which subpopulations to explicitly estimate. Moreover, the majority of the literature provides...  View Details
      Keywords: Causal Inference; Program Evaluation; Algorithms; Distributional Average Treatment Effect; Treatment Effect Subset Scan; Heterogeneous Treatment Effects
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      McFowland III, Edward, Sriram Somanchi, and Daniel B. Neill. "Efficient Discovery of Heterogeneous Treatment Effects in Randomized Experiments via Anomalous Pattern Detection." Working Paper, 2018. (2nd Round Revision.)
      • June 2017
      • Article

      Does Aggregated Returns Disclosure Increase Portfolio Risk Taking?

      By: John Beshears, James J. Choi, David Laibson and Brigitte C. Madrian
      Many experiments have found that participants take more investment risk if they see returns less frequently, see portfolio-level returns (rather than each individual asset’s returns), or see long-horizon (rather than one-year) historical return distributions. In...  View Details
      Keywords: Information; Investment Portfolio; Investment Return
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      Beshears, John, James J. Choi, David Laibson, and Brigitte C. Madrian. "Does Aggregated Returns Disclosure Increase Portfolio Risk Taking?" Review of Financial Studies 30, no. 6 (June 2017): 1971–2005.
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