Publications

2020
Working Paper

Do Lenders Still Discriminate? A Robust Approach for Assessing Differences in Menus

By: David Hao Zhang and Paul Willen

We use a new methodology to assess mortgage pricing discrimination by race. We make four main contributions. First, we show that existing estimates of mortgage pricing differences by race can be confounded by a "menu problem," which is the problem associated with... View Details

Keywords: Mortgages; Financing and Loans; Prejudice and Bias; Race; Measurement and Metrics; Banking Industry; United States

15 Apr 2015
HBS Seminar

Raymond Fisman, Columbia Business School

13 Aug 2014
Lessons from the Classroom

Managing the Family Business: Entrepreneurs Needed for Long-Run Success

generations of the family are supposed to take care of and grow the founder's creation; they are not expected to be entrepreneurs themselves. Even attempting to reinvent the family company can be seen as disloyal by the family. This... View Details

Keywords: by Michael J. Roberts

2024
Working Paper

Winner Take All: Exploiting Asymmetry in Factorial Designs

By: Matthew DosSantos DiSorbo, Iavor I. Bojinov and Fiammetta Menchetti

Researchers and practitioners have embraced factorial experiments to simultaneously test multiple treatments, each with different levels. With the rise of technologies like Generative AI, factorial experimentation has become even more accessible: it is easier than ever... View Details

Keywords: Factorial Designs; Fisher Randomizations; Rank Estimators; Employer Interventions; Causal Inference; Mathematical Methods; Performance Improvement

Article

Configurations of Rank-40r Extremal Even Unimodular Lattices (r=1,2,3)

By: Scott Duke Kominers and Zachary Abel

We show that if L is an extremal even unimodular lattice of rank 40r with r=1,2,3 then L is generated by its vectors of norms 4r and 4r+2. Our result is an extension of Ozeki's result for the case r=1. View Details

Keywords: Mathematical Methods

25 Sep 2012
Working Paper Summaries

Colocation and Scientific Collaboration: Evidence from a Field Experiment

Keywords: by Kevin Boudreau, Ina Ganguli, Patrick Gaule, Eva Guinan & Karim Lakhani; Health

Web

Program Requirements - Doctoral

behavior courses: Micro Topics in Organizational Behavior (HBS 4882) Macro Topics in Organizational Behavior (HBS 4880) Completion of four term-length courses in research methods: Two term-length courses in quantitative methods (FAS... View Details

November 2009
Journal Article

A Theory of Growth and Volatility at the Aggregate and Firm Level

By: Diego A. Comin and Sunil Mulani

This paper presents an endogenous growth model that explains the evolution of the first and second moments of productivity growth at the aggregate and firm level during the post-war period. Growth is driven by the development of both (i) idiosyncratic R&D innovations... View Details

Keywords: Volatility; Microeconomics; Innovation and Invention; Growth and Development Strategy; Resource Allocation; Performance Productivity; Mathematical Methods; Research and Development

18 Sep 2006
Research & Ideas

When Words Get in the Way: The Failure of Fiscal Language

Berkeley and Jagadeesh Gokhale of The Cato Institute), generational accounting indicates in present value what the typical member of each generation can expect to pay to the government, minus benefits from... View Details

Keywords: by Julia Hanna

2015
Article

Scalable Detection of Anomalous Patterns With Connectivity Constraints

By: Skyler Speakman, Edward McFowland III and Daniel B. Neill

We present GraphScan, a novel method for detecting arbitrarily shaped connected clusters in graph or network data. Given a graph structure, data observed at each node, and a score function defining the anomalousness of a set of nodes, GraphScan can efficiently and... View Details

Keywords: Biosurveillance; Event Detection; Graph Mining; Scan Statistics; Spatial Scan Statistic

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Article

Aztec Castles and the dP3 Quiver

By: Megan Leoni, Gregg Musiker, Seth Neel and Paxton Turner

Bipartite, periodic, planar graphs known as brane tilings can be associated to a large class of quivers. This paper will explore new algebraic properties of the well-studied del Pezzo 3 (dP3) quiver and geometric properties of its corresponding brane tiling. In... View Details

Keywords: Brane Tiling; Del Pezzo 3 Lattice; Dimer Model; Mathematical Methods

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04 May 2023
Blog Post

Why Business Travel Still Matters in a Zoom World

Nonstop flights generally make traveling more pleasant—but can they lead to innovation, too, especially in the global context? Research suggests that they can, with important takeaways for managers reinstating business travel in a world... View Details

Keywords: All Industries

June 2021
Case

HelloSelf: Launch

By: John R. Wells and Benjamin Weinstock

In April 2021, Charles Wells, founder and CEO of HelloSelf was reflecting on the company’s progress since it launched two years earlier. HelloSelf’s goal was to help the mentally ill recover and those who were mentally fit to stay well and feel even better. To do this,... View Details

Keywords: Mental Health; Health Care and Treatment; Internet and the Web; Growth and Development Strategy; Great Britain

Educators

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Article

Financial Analysis of Pediatric Resident Physician Primary Care Longitudinal Outpatient Experience

By: Robert S. Kaplan, Carole H. Stipelman, Brad Poss, Laura Anne Stetson, Luca Boi, Michael Rogers, Caleb Puzey, Sri Koduri, Vivian S. Lee and Edward B. Clark

Objective
To determine whether residency training represents a net positive or negative cost to academic medical centers, we analyzed the cost of a residency program and clinical productivity of residents and faculty in an outpatient primary care practice with or... View Details

Keywords: Academic Medicine; Cost; Children; Graduate Medical Education

The Sales Acceleration Formula provides a scalable, predictable approach to growing revenue and building a winning sales team. Everyone wants to build the next $100 million business and author Mark Roberge has actually done it using a unique methodology... View Details

2011
Article

Scalable Detection of Anomalous Patterns With Connectivity Constraints

By: Skyler Speakman, Edward McFowland III and Daniel B. Neill

We present GraphScan, a novel method for detecting arbitrarily shaped connected clusters in graph or network data. Given a graph structure, data observed at each node, and a score function defining the anomalousness of a set of nodes, GraphScan can efficiently and... View Details

Keywords: Biosurveillance; Event Detection; Graph Mining; Scan Statistics; Spatial Scan Statistic

October 2021
Article

Judgment Aggregation in Creative Production: Evidence from the Movie Industry

By: Hong Luo, Jeffrey T. Macher and Michael Wahlen

We study a novel, low-cost approach to aggregating judgment from a large number of industry experts on ideas that they encounter in their normal course of business. Our context is the movie industry, in which customer appeal is difficult to predict and investment costs... View Details

Keywords: Judgment Aggregation; Quality Uncertainty; Creative Industry; Project Evaluation And Selection; Creativity; Film Entertainment; Judgments; Motion Pictures and Video Industry