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- 2023
- Article
Estimating Causal Peer Influence in Homophilous Social Networks by Inferring Latent Locations.
By: Edward McFowland III and Cosma Rohilla Shalizi
Social influence cannot be identified from purely observational data on social networks, because such influence is generically confounded with latent homophily, that is, with a node’s network partners being informative about the node’s attributes and therefore its...
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- March 2023
- Case
Mirakl: Growing The Marketplace Economy
By: Antonio Moreno, Santiago Gallino and Emilie Billaud
Mirakl provided the technology and seller network required for companies like Macy's, Best Buy, Walmart, Siemens, or Carrefour to simply design, launch, and administer a marketplace that included products from third-party sellers. What began as a basic business idea in...
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Keywords:
Business Growth and Maturation;
Business Startups;
Transformation;
Technological Innovation;
Growth and Development Strategy;
Internet and the Web;
Technology Adoption;
Sales;
Information Technology Industry;
Information Technology Industry;
Information Technology Industry;
Europe;
France;
Paris;
United States
- March 2023
- Teaching Note
Ransomware at Springhill Medical Center
By: Suraj Srinivasan and Li-Kuan Ni
In July, 2019, Springhill Medical Center (“SMC”) in Mobile, Alabama fell prey to a malicious ransomware attack that crippled the hospital’s internal network systems and public-facing web page. While the hospital rushed to securely restore the network, medical personnel...
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Keywords:
Disruption;
Communication;
Communication Strategy;
Decision Making;
Decision Choices and Conditions;
Judgments;
Corporate Accountability;
Corporate Disclosure;
Corporate Governance;
Governance Controls;
Policy;
Employees;
News;
Cybersecurity;
Digital Strategy;
Information Infrastructure;
Information Management;
Internet and the Web;
Crisis Management;
Business or Company Management;
Resource Allocation;
Risk Management;
Negotiation Tactics;
Failure;
Business and Stakeholder Relations;
Attitudes;
Behavior;
Perception;
Reputation;
Trust;
Public Opinion;
Social Issues;
Health Industry;
Alabama;
United States
- February 2023
- Case
Ransomware Attack at Springhill Medical Center
By: Suraj Srinivasan and Li-Kuan (Jason) Ni
In July, 2019, Springhill Medical Center (“SMC”) in Mobile, Alabama fell prey to a malicious ransomware attack that crippled the hospital’s internal network systems and public-facing web page. While the hospital rushed to securely restore the network, medical personnel...
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Keywords:
Disruption;
Communication;
Communication Strategy;
Decision Making;
Decision Choices and Conditions;
Judgments;
Corporate Accountability;
Corporate Disclosure;
Corporate Governance;
Governance Controls;
Policy;
Employees;
News;
Cybersecurity;
Digital Strategy;
Information Infrastructure;
Information Management;
Internet and the Web;
Crisis Management;
Resource Allocation;
Risk Management;
Negotiation Tactics;
Failure;
Business and Stakeholder Relations;
Attitudes;
Behavior;
Perception;
Reputation;
Trust;
Public Opinion;
Social Issues;
Health Industry;
United States;
Alabama
- February 2023 (Revised March 2023)
- Case
Hey, Insta & YouTube, Are You Watching TikTok?
In early 2023, the entertainment app TikTok reached close to 1 billion users globally, placing it 4th behind the leading social networks of Facebook, YouTube, and Instagram. Featuring a sophisticated recommendation engine, TikTok mastered the art of keeping users...
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- 2023
- Article
Evaluating Explainability for Graph Neural Networks
By: Chirag Agarwal, Owen Queen, Himabindu Lakkaraju and Marinka Zitnik
As explanations are increasingly used to understand the behavior of graph neural networks (GNNs), evaluating the quality and reliability of GNN explanations is crucial. However, assessing the quality of GNN explanations is challenging as existing graph datasets have no...
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Keywords:
Analytics and Data Science
- 2022
- Article
Efficiently Training Low-Curvature Neural Networks
By: Suraj Srinivas, Kyle Matoba, Himabindu Lakkaraju and Francois Fleuret
Standard deep neural networks often have excess non-linearity, making them susceptible to issues such as low adversarial robustness and gradient instability. Common methods to address these downstream issues, such as adversarial training, are expensive and often...
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Keywords:
AI and Machine Learning
- November 2022 (Revised January 2023)
- Case
Hugging Face: Serving AI on a Platform
By: Shane Greenstein, Daniel Yue, Kerry Herman and Sarah Gulick
It is fall 2022, and open-source AI model company Hugging Face is considering its three areas of priorities: platform development, supporting the open-source community, and pursuing cutting-edge scientific research. As it expands services for enterprise clients, which...
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- 2022
- Working Paper
Shared Models in Networks, Organizations, and Groups
By: Joshua Schwartzstein and Adi Sunderam
To understand new information, we exchange models or interpretations with others. This
paper provides a framework for thinking about such social exchanges of models. The key assumption is that people adopt the interpretation in their network that best explains the...
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- 2022
- Working Paper
You've Got Mail! The Late 19th Century U.S. Postal Service Expansion, Entrepreneurship, and Firm Performance
By: Astrid Marinoni and Maria P. Roche
We analyze the impact of the US Postal Service's western expansion in the late 19th century, a major institutional innovation, on entrepreneurship and its heterogeneous influence on firm performance. Exploiting a novel dataset constructed from digitized archival...
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- October 2022
- Article
Revisiting Extraversion and Leadership Emergence: A Social Network Churn Perspective
By: Blaine Landis, Jon M. Jachimowicz, Dan J. Wang and Robert W. Krause
One of the classic relationships in personality psychology is that extraversion is associated with emerging as an informal leader. However, recent findings raise questions about the longevity of extraverted individuals as emergent leaders. Here, we adopt a social...
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- August 2022
- Case
SuperRare: Turning an NFT Marketplace into a DAO
By: Jeffrey J. Bussgang, Scott Duke Kominers and Amy Klopfenstein
In June 2021, John Crain and Jonathan Perkins, the founders of SuperRare, a marketplace for non-fungible tokens (NFTs), contemplate whether to transform their company into a decentralized autonomous organization (DAO). Crain and Perkins founded SuperRare in 2018 to...
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Keywords:
NFTs;
Crypto Economy;
Alternative Assets;
DAOs;
Arts;
Governance;
Governance Controls;
Governing Rules, Regulations, and Reforms;
Information Technology;
Technology Adoption;
Internet and the Web;
Digital Platforms;
Innovation and Invention;
Technological Innovation;
Disruptive Innovation;
Finance;
Currency;
Investment;
Markets;
Auctions;
Bids and Bidding;
Demand and Consumers;
Network Effects;
Market Design;
Market Transactions;
Market Timing;
Web Services Industry;
North and Central America;
United States
- Article
The Value of Intermediation in the Stock Market
By: Marco Di Maggio, Mark Egan and Francesco Franzoni
We estimate a structural model of broker choice to quantitatively decompose the value that institutional investors attach to broker services. Studying over 300 million institutional equity trades, we find that investors are sensitive to both explicit and implicit...
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- July 2022
- Teaching Note
Arçelik (A), (B): From a Dealer Network to an Omnichannel Experience
By: Ayelet Israeli, Fares Khrais and Menna Hassan
Arçelik Turkey, the country’s market leader in household appliances, was at an omnichannel crossroads in January 2020. Arçelik was a B2B player utilizing a dealership network with an umbrella of brands and had one of the largest brick-and-mortar store networks in...
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Keywords:
Digital Marketing;
Bricks And Mortar;
Franchise Management;
Franchising;
Dealer Network;
Dealers;
B2B;
B2B2C;
Tradition;
Culture Change;
Cultural Adaptation;
Omnichannel;
Omnichannel Retail;
Omni-channel;
Omnichannel Retailing;
Sales Channels;
Sales Channel Development;
Channel Management;
Channels Of Distribution;
Marketplace;
Platforms;
Collaboration;
Online Channel;
Online Data;
Online Sales;
Online Shopping;
Online;
Retail;
Retailing;
Disruption;
Transformation;
Franchise Ownership;
Change Management;
Partners and Partnerships;
Consumer Behavior;
Sales;
Internet and the Web;
Marketing Strategy;
Conflict and Resolution;
Conflict Management;
Organizational Culture;
Distribution Channels;
Digital Transformation;
Electronics Industry;
Retail Industry;
Consumer Products Industry;
Turkey
- 2022
- Working Paper
Hidden Alpha
By: Lauren Cohen, Manuel Amman, Alexander Cochardt and Stephan Heller
Using the setting of financial agents, we explore the importance of hidden connections relative
to all other network connections. We find that hidden connections are those associated with
the largest and most significant abnormal returns accruing to fund managers—on...
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- June 2022
- Case
Strategic Innovation at the United Nations: A Network of Ecosystems
By: Frank Nagle, Elizabeth J. Altman and Amy Klopfenstein
In 2021, Gina Lucarelli, leader of the United Nations Development Programme (UNDP) Accelerator Labs, prepared for a meeting with UNDP Administrator Achim Steiner. The two planned to discuss the future of the Accelerator Labs, a network of social innovation labs located...
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Keywords:
Change;
Disruption;
Transformation;
Change Management;
Education;
Learning;
Environmental Management;
Climate Change;
Environmental Sustainability;
Geography;
Geographic Scope;
Global Range;
Local Range;
Geopolitical Units;
Country;
Human Resources;
Recruitment;
Retention;
Selection and Staffing;
Employees;
Employee Relationship Management;
Information Technology;
Information Management;
Innovation and Invention;
Collaborative Innovation and Invention;
Disruptive Innovation;
Innovation and Management;
Innovation Leadership;
Innovation Strategy;
Knowledge;
Knowledge Acquisition;
Knowledge Dissemination;
Knowledge Management;
Knowledge Sharing;
Knowledge Use and Leverage;
Organizations;
Mission and Purpose;
Organizational Culture;
Organizational Structure;
Organizational Design;
Organizational Change and Adaptation;
Social Enterprise;
Non-Governmental Organizations;
Social Psychology;
Social and Collaborative Networks;
Society;
Social Issues;
Welfare;
Strategy;
Cooperation;
Adaptation;
Public Administration Industry;
North and Central America
- May 2022
- Case
Rawbank's Illico Cash: Can 'Fast Money' Overcome Cash Dependency in the DRC?
By: Lauren Cohen and Grace Headinger
Thomas de Dreux-Brézé, the Head of Strategy and Project Management at Rawbank Congo in the Democratic Republic of the Congo (DRC), was perplexed as he reviewed annual adoption rates for the bank’s launch of Illico Cash 2.0. As the bank’s mobile money app, Illico Cash...
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Keywords:
Fintech;
Inflation;
Deflation;
Rural;
Urban;
Emerging Market;
Mobile Technology;
Finance;
Money;
Inflation and Deflation;
Business Growth and Maturation;
Decision Choices and Conditions;
Demographics;
Developing Countries and Economies;
Corporate Entrepreneurship;
Behavioral Finance;
Currency;
Banks and Banking;
Commercial Banking;
Financial Strategy;
Rural Scope;
Urban Scope;
Innovation Strategy;
Emerging Markets;
Network Effects;
Consumer Behavior;
Mobile and Wireless Technology;
Technology Adoption;
Banking Industry;
Financial Services Industry;
Technology Industry;
Congo, Democratic Republic of the
- Article
Why Build in Web3
By: Jad Esber and Scott Duke Kominers
A major change is coming to the internet. While today’s dominant platforms have guarded their troves of user data and maintained an advantage through network effects, new companies—working in what they're calling a “Web3” model—are proposing a new value proposition to...
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- April 2022 (Revised May 2022)
- Case
Mastercard Labs (A)
When Ajaypal (Ajay) Banga became the CEO of Mastercard in 2010, he shifted the company’s competitive focus from card networks to cash itself. Mastercard’s new vision of a “World Beyond Cash” distilled into a three-pronged framework: Grow the core business, Diversify...
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Keywords:
Organizational Behavior;
Culture;
Organizational Culture;
Culture Change;
Organizational Adaptation;
Organizational Effectiveness;
Alignment;
Leadership;
Leadership Development;
Innovation;
Innovation Ecosystems;
Ecosystem;
Diversity;
Collaboration;
Co-creation;
Learning Organizations;
Empowerment;
Globalization;
Agility;
Prototype;
Experiment;
Partnerships;
Operating Model;
Risk Management;
Metrics;
Payments;
Financial Inclusion;
Financial Industry;
Ambidexterity;
Corporate Innovation;
Innovation Lab;
Digital Transformation;
Digital Strategy;
Credit Cards;
Innovation Leadership
- March 2022
- Case
Unilever: Remote Work in Manufacturing
By: Prithwiraj Choudhury and Susie L. Ma
In December 2021, Unilever—one of the world’s largest producers of consumer goods—was in the midst of a pilot project to digitize its manufacturing facilities and enable remote work for factory employees. This was possible because of an earlier project to retrofit a...
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