Publications

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

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

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

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

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

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

Register to Read

2023
Article

Dynamic HTA for Digital Health Solutions: Opportunities and Challenges for Patient-Centered Evaluation

By: Jan B. Brönneke, Annika Herr, Simon Reif and Ariel D. Stern

Germany’s 2019 Digital Healthcare Act (Digitale-Versorgung-Gesetz, or DVG) created a number of opportunities for the digital transformation of the health care delivery system. Key among these was the creation of a reimbursement pathway for patient-centered digital... View Details

Keywords: Digital Transformation; Applications and Software; Product Development; Insurance; Policy; Health Industry; Germany

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

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

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

To all who declare that American democracy is broken—riven by partisanship, undermined by extremism, and corrupted by wealth—history offers hope. In nearly every generation since the nation’s founding, critics have made similar declarations, and yet the nation is... View Details

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

Purchase

November 2012
Article

The Variance of Non-Parametric Treatment Effect Estimators in the Presence of Clustering

By: Samuel G. Hanson and Adi Sunderam

Non-parametric estimators of treatment effects are often applied in settings where clustering may be important. We provide a general methodology for consistently estimating the variance of a large class of non-parametric estimators, including the simple matching... View Details

Keywords: Treatment Effects; Matching Estimators; Clustering; Applications and Software; Mathematical Methods

18 Nov 2014
First Look

First Look: November 18

and that advertising was critical only in a close election, such as the one in 2004. Interestingly, had the Democrats received more outside advertising in 2004, the election would have ended up in a 269-269 tie. Our findings generate... View Details

Keywords: Sean Silverthorne

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

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

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