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- 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
- March 2015
- Article
Business Model Evaluation: Quantifying Walmart's Sources of Advantage
By: Humberto Brea-Solís, Ramon Casadesus-Masanell and Emili Grifell-Tatjé
We develop an analytical framework on the basis of the economics of business performance to provide quantitative insight into the link between a firm's business model choices and its profit consequences. The method is applied to Walmart by building a qualitative... View Details
- 2015
- Working Paper
Configurations of Extremal Type II Codes
By: Noam D. Elkies and Scott Duke Kominers
We prove configuration results for extremal Type II codes, analogous to the configuration results of Ozeki and of the second author for extremal Type II lattices. Specifically, we show that for n∈{8,24,32,48,56,72,96} every extremal Type II code of length n is... View Details
Keywords: Mathematical Methods
- 2015
- Chapter
Optimal Process Control of Symbolic Transfer Functions
By: Christopher Griffin and Elisabeth Paulson
Transfer function modeling is a standard technique in classical Linear Time Invariant and Statistical Process Control. The work of Box and Jenkins was seminal in developing methods for identifying parameters associated with classical (r, s, k) transfer functions.... 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
- November–December 2014
- Article
Using Time-Driven Activity-Based Costing to Identify Value-Improvement Opportunities in Healthcare
By: Robert S. Kaplan, Mary L. Witkowski, Megan Abbott, Alexis Guzman, Laurence Higgins, John Meara, Erin Padden, Apurva Shah, Peter Waters, Marco Weidemeier, Samuel Wertheimer and Thomas W. Feeley
As healthcare providers cope with pricing pressures and increased accountability for performance, they should be rededicating themselves to improving the value they deliver to their patients: better outcomes and lower costs. Time-driven activity-based costing offers... View Details
- 2016
- Working Paper
The Search for Peer Firms: When Do Crowds Provide Wisdom?
By: Charles M.C. Lee, Paul Ma and Charles C.Y. Wang
In knowledge-based economies, many business enterprises defy traditional industry boundaries. In this study, we evaluate six "big data" approaches to peer firm identifications and show that some, but not all, "wisdom-of-crowd" techniques perform exceptionally well. We... View Details
- October 2014
- Article
Hidden Structure: Using Network Methods to Map System Architecture
By: Carliss Y. Baldwin, Alan MacCormack and John Rusnak
In this paper, we describe an operational methodology for characterizing the architecture of complex technical systems and demonstrate its application to a large sample of software releases. Our methodology is based upon directed network graphs, which allows us to... View Details
- October 2014
- Article
The Promise of Positive Optimal Taxation: Normative Diversity and a Role for Equal Sacrifice
A prominent assumption in modern optimal tax research is that the objective of taxation is Utilitarian. I present new survey evidence that most people disagree with this assumption, preferring tax policies based at least in part on a classic alternative objective: the... View Details
- August 2014 (Revised November 2015)
- Case
Rick's Dilemma
By: Arthur I. Segel, Charles F. Wu, Siddharth Yog and Ben Eppler
In 2014, Rick is serving as a trustee for a large family trust whose principle asset is a plot of prime real estate in the Upper East Side of Manhattan. The land is currently subject to a ground lease which pays $4.6 million annually, with resets every 20 years at 4.5%... View Details
- 2014
- Chapter
Building an Infrastructure for Empirical Research on Social Enterprise: Challenges and Opportunities
By: Matthew Lee, Julie Battilana and Ting Wang
Purpose: Despite the increase in empirical studies of social enterprise in management and organization research, the lack of a cohesive knowledge base in this area is concerning. In this chapter, we propose that the underdevelopment of the attendant research... View Details
Keywords: Social Entrepreneurship
- July 2014 (Revised May 2015)
- Case
Making Room for the Baby Boom: Senior Living
By: Charles F. Wu, Joseph Beyer and Arthur I. Segel
Tom Alperin's National Development has purchased a building site in affluent Wellesley, MA, and is in the process of deciding whether to build apartments, a combination of independent living and assisted living units for seniors, or perhaps even higher acuity... View Details
- 2014
- Teaching Note
Fine Harvest Restaurant Group
By: Clara X. Chen, Kenneth A. Merchant, Tatiana Sandino and Wim Van der Stede
The Fine Harvest Restaurant Group cases A and B examine a company's design of a new system to evaluate the performance (and determine the bonuses) for its restaurant managers. Fine Harvest had traditionally evaluated restaurant managers based on store margins and had... View Details
- 2014
- Working Paper
Non-Adherence in Health Care: A Positive and Normative Analysis
By: Mark Egan and Tomas J. Philipson
Non-adherence in health care results when a patient does not initiate or continue care that a provider has recommended. Previous research identifies non-adherence as a major source of waste in US health care, totaling approximately 2.3% of GDP, and have proposed a... View Details
- Article
Asymptotic Improvements of Lower Bounds for the Least Common Multiples of Arithmetic Progressions
By: Daniel M. Kane and Scott Duke Kominers
For relatively prime positive integers and r, we consider the least common multiple L_n:=\mathop{\textrm{lcm}}(u_0,u_1,\dots, u_n) of the finite arithmetic progression \{u_k:=u_0+kr\}_{k=0}^n. We derive new lower bounds on L_n that improve upon those obtained... View Details
Keywords: Mathematical Methods
- April 2014
- Tutorial
Conjoint Analysis: Online Tutorial
By: Elie Ofek and Olivier Toubia
The Conjoint Analysis: Online Tutorial is an interactive pedagogical vehicle intended to facilitate understanding of one of the most popular market research methods in academia and practice, namely conjoint analysis. The aim is to provide students or executives going... View Details
- Spring 2014
- Article
Leveraging Crowdsourced Peer-to-Peer Assessments to Enhance the Case Method of Learning
By: Jill Avery
Many marketing educators use the case method to help their students strengthen their decision-making skills. Rigorous class participation is essential to achieving learning objectives in case method learning. One challenge for case method instructors is the assessment... View Details
- 2014
- Working Paper
Visualizing and Measuring Software Portfolio Architectures: A Flexibility Analysis
By: Robert Lagerstrom, Carliss Y. Baldwin, Alan MacCormack and David Dreyfus
In this paper, we test a method for visualizing and measuring software portfolio architectures and use our measures to predict the costs of architectural change. Our data is drawn from a biopharmaceutical company, comprising 407 architectural components with 1,157... View Details
- 2013
- Working Paper
Separating Homophily and Peer Influence with Latent Space
By: Joseph P. Davin, Sunil Gupta and Mikolaj Jan Piskorski
We study the impact of peer behavior on the adoption of mobile apps in a social network. To identify social influence properly, we introduce latent space as an approach to control for latent homophily, the idea that "birds of a feather flock together." In a series of... View Details
- January 2014
- Technical Note
Learning From Extreme Consumers
By: Jill Avery and Michael Norton
Traditional market research methods focus on understanding the average experiences of average consumers. This focus leads to gaps in our knowledge of consumer behavior and often fails to uncover insights that can drive revolutionary, rather than evolutionary... View Details