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- 2025
- Working Paper
Dynamic Personalization with Multiple Customer Signals: Multi-Response State Representation in Reinforcement Learning
Reinforcement learning (RL) offers potential for optimizing sequences of customer interactions by modeling the relationships
between customer states, company actions, and long-term value. However, its practical implementation often faces significant
challenges.... View Details
Keywords: Dynamic Policy; Deep Reinforcement Learning; Representation Learning; Dynamic Difficulty Adjustment; Latent Variable Models; Customer Relationship Management; Customer Value and Value Chain; Foreign Direct Investment; Analytics and Data Science
Ma, Liangzong, Ta-Wei Huang, Eva Ascarza, and Ayelet Israeli. "Dynamic Personalization with Multiple Customer Signals: Multi-Response State Representation in Reinforcement Learning." Harvard Business School Working Paper, No. 25-037, February 2025.
- January 2025
- Case
Colbún’s Angostura Dam Project (A)
By: James K. Sebenius and Nicolas Andrade
The A case describes Colbún Chile’s plans for the Angostura dam in the Bío Bío River, a hydroelectric construction venture with major challenges given the region’s history of indigenous resistance. This context was especially unfavorable given the highly contentious... View Details
- January 2025
- Supplement
Colbún’s Angostura Dam Project (B)
By: James K. Sebenius and Nicolas Andrade
The A case describes Colbún Chile’s plans for the Angostura dam in the Bío Bío River, a hydroelectric construction venture with major challenges given the region’s history of indigenous resistance. This context was especially unfavorable given the highly contentious... View Details
- 2025
- Article
Statistical Inference for Heterogeneous Treatment Effects Discovered by Generic Machine Learning in Randomized Experiments
By: Kosuke Imai and Michael Lingzhi Li
Researchers are increasingly turning to machine learning (ML) algorithms to investigate causal heterogeneity in randomized experiments. Despite their promise, ML algorithms may fail to accurately ascertain heterogeneous treatment effects under practical settings with... View Details
Imai, Kosuke, and Michael Lingzhi Li. "Statistical Inference for Heterogeneous Treatment Effects Discovered by Generic Machine Learning in Randomized Experiments." Journal of Business & Economic Statistics 43, no. 1 (2025): 256–268.
- 2025
- Working Paper
Too Much, Too Soon? Early Funding, Technological Unconventionality, and Innovation Capabilities
By: Harsh Ketkar and Maria Roche
The availability of financial resources significantly shapes firm innovation outcomes, especially for early-stage,
innovation-focused technology firms. However, prior research has provided conflicting findings about this
relationship: On the one hand, resource... View Details
Keywords: Startups; Technology Strategy; Novelty; Unconventionality; Resource Constraints; Early Stage Firms; Business Startups; Technological Innovation; Entrepreneurial Finance
Ketkar, Harsh, and Maria Roche. "Too Much, Too Soon? Early Funding, Technological Unconventionality, and Innovation Capabilities." Harvard Business School Working Paper, No. 25-032, December 2024. (Revised February 2025.)
- November 2024
- Case
Group AMANA: Built to Last
By: Hise Gibson and Fares Khrais
"The case chronicles the Bsaibes brothers’ journey in founding and operating Group AMANA; a contracting business founded in 1993, based in the United Arab Emirates with operations across the Middle East. Over the years, the business found itself grappling with major... View Details
Gibson, Hise, and Fares Khrais. "Group AMANA: Built to Last." Harvard Business School Case 625-068, November 2024.
- November 2024 (Revised January 2025)
- Case
Balancing Impact: Modeling the Future at British International Investment
By: Shawn Cole and Jonah Zahnd
In 2022, British International Investment (BII), the £8.1 billion development finance arm of the British government, implemented a new impact measurement system called the Impact Score to align its financial and impact objectives systematically. The tool was designed... View Details
Cole, Shawn, and Jonah Zahnd. "Balancing Impact: Modeling the Future at British International Investment." Harvard Business School Case 225-047, November 2024. (Revised January 2025.)
- 2024
- Working Paper
Why Has Construction Productivity Stagnated? The Role of Land-Use Regulation
By: Leonardo D’Amico, Edward Glaeser, Joseph Gyourko, William Kerr and Giacomo A. M. Ponzetto
We document a Kuznets curve for construction productivity in 20th-century America.
Homes built per construction worker remained stagnant between 1900 and 1940, boomed after
World War II, and then plummeted after 1970. The productivity boom from 1940 to 1970
shows... View Details
D’Amico, Leonardo, Edward Glaeser, Joseph Gyourko, William Kerr, and Giacomo A. M. Ponzetto. "Why Has Construction Productivity Stagnated? The Role of Land-Use Regulation." Harvard Business School Working Paper, No. 25-027, November 2024.
- September 2024 (Revised November 2024)
- Case
Moss & Associates: 'Empower to Create the Exceptional'
By: Boris Groysberg and Sarah L. Abbott
In 2023, Moss & Associates, a Fort Lauderdale-based general contractor, celebrated its 20th anniversary. The business was founded by Bob Moss and his sons, Chad and Scott. The company had grown to 3,800 employees generating over $3 billion in revenues via two business... View Details
Keywords: Solar; Growth; Community; Organizational Culture; Family Business; Growth Management; Construction Industry; United States
Groysberg, Boris, and Sarah L. Abbott. "Moss & Associates: 'Empower to Create the Exceptional'." Harvard Business School Case 425-006, September 2024. (Revised November 2024.)
- 2024
- Working Paper
Finance Without Exotic Risk
By: Pedro Bordalo, Nicola Gennaioli, Rafael La Porta and Andrei Shleifer
We address the joint hypothesis problem in cross-sectional asset pricing by using measured analyst expectations of earnings growth. We construct a firm-level measure of Expectations Based Returns (EBRs) that uses analyst forecast errors and revisions and shuts down any... View Details
Bordalo, Pedro, Nicola Gennaioli, Rafael La Porta, and Andrei Shleifer. "Finance Without Exotic Risk." NBER Working Paper Series, No. 33004, September 2024.
- 2024
- Working Paper
The New Digital Divide
By: Mayana Pereira, Shane Greenstein, Raffaella Sadun, Prasanna Tambe, Lucia Ronchi Darre, Tammy Glazer, Allen Kim, Rahul Dodhia and Juan Lavista Ferres
We build and analyze new metrics of digital usage that leverage telemetry data collected by Microsoft during operating system updates across forty million Windows devices in U.S. households. These measures of US household digital usage are much more comprehensive than... View Details
Keywords: Mathematical Methods; Measurement and Metrics; Geographic Location; Behavior; Technology Adoption; Demographics
Pereira, Mayana, Shane Greenstein, Raffaella Sadun, Prasanna Tambe, Lucia Ronchi Darre, Tammy Glazer, Allen Kim, Rahul Dodhia, and Juan Lavista Ferres. "The New Digital Divide." NBER Working Paper Series, No. 32932, September 2024.
- August 2024 (Revised November 2024)
- Case
Commonwealth Fusion Systems: Born at Scale
This case study chronicles the journey of Commonwealth Fusion Systems (CFS) on its ambitious mission to commercialize fusion energy and become the world’s leading provider of fusion power plants. Emerging from a “special arrangement” with MIT's Plasma Science and... View Details
Keywords: Nuclear Energy; Innovation; Entrepreneurship; Entrepreneurial Finance; Energy Generation; Commercialization; Science-Based Business; Technological Innovation; Market Entry and Exit; Energy Industry
Krieger, Joshua Lev, Jim Matheson, Kyle Myers, Gunnar Trumbull, and Richard Vietor. "Commonwealth Fusion Systems: Born at Scale." Harvard Business School Case 825-061, August 2024. (Revised November 2024.)
- 2024
- Working Paper
“If You’re Not There… You’re Not There”: How Art Market Platforms Induce Status Anxiety to Coerce Participation
By: James Riley and Ezra Zuckerman Sivan
This paper, an 18-month ethnographic investigation of international art fairs (IAFs), shows how market platforms can have a coercive effect, inducing sellers (i.e., art galleries) to participate despite ambivalence over their value and anxiety over the process by which... View Details
- July 2024 (Revised December 2024)
- Background Note
District Heating: An Overview
By: Willy Shih and Michael W. Toffel
This note provides an overview of district heating: systems in which central plants generate heat that is conveyed by steam or water through a set of insulated pipes to send heat to residential and/or commercial buildings. It describes key elements of the system (heat... View Details
Keywords: Decarbonization; Climate Change; Energy Efficiency; Energy Storage; Energy Transmission; Construction; Energy; Buildings and Facilities; Energy Industry; Denmark; Europe; United States
Shih, Willy, and Michael W. Toffel. "District Heating: An Overview." Harvard Business School Background Note 625-008, July 2024. (Revised December 2024.)
- July–August 2024
- Article
Doing More with Less: Overcoming Ineffective Long-Term Targeting Using Short-Term Signals
By: Ta-Wei Huang and Eva Ascarza
Firms are increasingly interested in developing targeted interventions for customers with the best response,
which requires identifying differences in customer sensitivity, typically through the conditional average treatment
effect (CATE) estimation. In theory, to... View Details
Keywords: Long-run Targeting; Heterogeneous Treatment Effect; Statistical Surrogacy; Customer Churn; Field Experiments; Consumer Behavior; Customer Focus and Relationships; AI and Machine Learning; Marketing Strategy
Huang, Ta-Wei, and Eva Ascarza. "Doing More with Less: Overcoming Ineffective Long-Term Targeting Using Short-Term Signals." Marketing Science 43, no. 4 (July–August 2024): 863–884.
- June 2024 (Revised August 2024)
- Case
Cementos Argos in the U.S.: Go Big or Go Home?
By: Jorge Tamayo, Ruth Costas, Pedro Levindo and Karina Souza
In April 2011, Colombian group Cementos Argos had to decide on whether to double down its business in the U.S., amidst the U.S. cement industry’s lowest performance in 30 years. Argos— Colombia’s leading cement producer and one of the “jewels” of Grupo GEA, the... View Details
Keywords: Mergers and Acquisitions; Business Organization; Business Subsidiaries; Talent and Talent Management; Cost vs Benefits; Financial Crisis; Cross-Cultural and Cross-Border Issues; Global Strategy; Business Strategy; Construction Industry; Construction Industry; Latin America; South America; North and Central America; United States; Colombia
Tamayo, Jorge, Ruth Costas, Pedro Levindo, and Karina Souza. "Cementos Argos in the U.S.: Go Big or Go Home?" Harvard Business School Case 724-500, June 2024. (Revised August 2024.)
- June 2024
- Case
Vinalhaven: The Downtown Project
By: Richard S. Ruback, Matthew Preble, Ruth Page and Dave Habeeb
Vinalhaven is an island community located approximately 12 miles off the coast of Maine. The island has a year-round population of about 1,300 people as of 2022, with an additional 3,000 people who reside on the island in the summer months. The two largest industries... View Details
Keywords: Climate Change; Environmental Regulation; Environmental Sustainability; Natural Resources; Natural Environment; Weather; Sustainable Cities; Forecasting and Prediction; Construction; Property; Infrastructure; Capital Budgeting; Projects; Project Finance; Negotiation; United States; Maine
Ruback, Richard S., Matthew Preble, Ruth Page, and Dave Habeeb. "Vinalhaven: The Downtown Project." Harvard Business School Multimedia/Video Case 224-735, June 2024.