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      • February 2023
      • Article

      OTC Intermediaries

      By: Andrea L. Eisfeldt, Bernard Herskovic, Sriram Rajan and Emil Siriwardane
      We study the effect of dealer exit on prices and quantities in a model of an over-the-counter (OTC) market featuring a core-periphery network with bilateral trading costs. The model is calibrated using regulatory data on the entire U.S. credit default swap (CDS) market...  View Details
      Keywords: OTC Markets; Intermediaries; Dealers; Credit Default Swaps; Risk Sharing; Financial Markets; Networks; Price; Risk and Uncertainty
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      Eisfeldt, Andrea L., Bernard Herskovic, Sriram Rajan, and Emil Siriwardane. "OTC Intermediaries." Review of Financial Studies 36, no. 2 (February 2023): 615–677.
      • January 2023
      • Module Note

      Network Effects in Technology

      By: Andy Wu and Matt Higgins
      In business and strategy contexts, network effects are often accompanied by bandwagon (or herding) effects, positive feedback loops (or accumulated advantage effects), and market tipping (or winner-take-all dynamics). Though these phenomena are often grouped together...  View Details
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      Wu, Andy, and Matt Higgins. "Network Effects in Technology." Harvard Business School Module Note 723-417, January 2023.
      • January 2023 (Revised January 2023)
      • Case

      Belden and Digital Transformation: From Product Sales to Solutions Sales

      By: Frank V. Cespedes and Amy Klopfenstein
      This case provides an overview of a sales transformation in the industrial automation division at Belden, a hardware manufacturer. While Belden historically sold products such as cables, wires, and other networking devices, EVP of Industrial Automation Ashish Chand...  View Details
      Keywords: Implementation; Sales Cycle; Digital Transformation; Sales; Product Positioning; Business Model; Market Entry and Exit; Customer Focus and Relationships; Business and Stakeholder Relations; Supply and Industry; Technology Industry; North America; United States
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      Cespedes, Frank V., and Amy Klopfenstein. "Belden and Digital Transformation: From Product Sales to Solutions Sales." Harvard Business School Case 823-002, January 2023. (Revised January 2023.)
      • 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...  View Details
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      Cohen, Lauren, Manuel Amman, Alexander Cochardt, and Stephan Heller. "Hidden Alpha." Working Paper, 2022.
      • January 2023
      • Article

      Social Networks, Ethnicity, and Entrepreneurship

      By: William R. Kerr and Martin Mandorff
      We study the relationship between ethnicity, occupational choice, and entrepreneurship. Immigrant groups in the United States cluster in specific business sectors. For example, Koreans are 34 times more concentrated in self-employment for dry cleaning than other...  View Details
      Keywords: Self-employed; Occupation; Entrepreneurship; Ethnicity; Immigration; Networks
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      Kerr, William R., and Martin Mandorff. "Social Networks, Ethnicity, and Entrepreneurship." Journal of Human Resources 58, no. 1 (January 2023): 183–220.
      • January–February 2023
      • Article

      The Overlooked Key to a Successful Scale-Up

      By: Jeffrey F. Rayport, Davide Sola and Martin Kupp
      Many start-ups experience enormous popularity and runaway growth, but only a few go on to become stable giants. What separates them from the pack? They all go through a developmental stage called extrapolation, say three business school professors.
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      Keywords: Entrepreneurship And Strategy; Scalability; Business Startups; Growth and Development Strategy; Entrepreneurship
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      Rayport, Jeffrey F., Davide Sola, and Martin Kupp. "The Overlooked Key to a Successful Scale-Up." Harvard Business Review (January–February 2023): 56–65.
      • December 2022
      • Case

      Iberdrola: Leading the Energy Revolution

      By: Juan Alcácer and Emer Moloney
      At the end of 2019, Ignacio Galán, the Chairman and CEO of the world's third largest utility, Iberdrola, relected on his almost 20 years at the company. He managed a portfolio of three very different businesses, each with their own specific opportunities and...  View Details
      Keywords: Energy; Energy Generation; Energy Sources; Non-Renewable Energy; Renewable Energy; Engineering; Innovation and Management; Innovation Leadership; Innovation Strategy; Technological Innovation; Leadership; Growth and Development Strategy; Market Timing; Industry Growth; Mission and Purpose; Strategy; Energy Industry; Green Technology Industry; Utilities Industry; Transportation Industry; Auto Industry; Spain; United Kingdom; United States; Brazil; Mexico
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      Alcácer, Juan, and Emer Moloney. "Iberdrola: Leading the Energy Revolution." Harvard Business School Case 723-398, December 2022.
      • 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...  View Details
      Keywords: Community; Open-source; AI and Machine Learning; Product Development; Networks; Service Delivery; Research; Governance; Business and Stakeholder Relations; Information Industry; Technology Industry; United States
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      Greenstein, Shane, Daniel Yue, Kerry Herman, and Sarah Gulick. "Hugging Face: Serving AI on a Platform." Harvard Business School Case 623-026, November 2022. (Revised January 2023.)
      • 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...  View Details
      Keywords: Social Learning Theory; Theory; Social Issues; Cognition and Thinking; Social and Collaborative Networks; Attitudes
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      Schwartzstein, Joshua, and Adi Sunderam. "Shared Models in Networks, Organizations, and Groups." NBER Working Paper Series, No. 30642, November 2022.
      • October 2022
      • Case

      Colette Phillips and GetKonnected!: Creating Inclusive Ecosystems

      By: Rosabeth Moss Kanter, Amy Chiu and Joyce Kim
      GetKonnected! began in 2008 as a bimonthly networking and evolved into five initiatives in 2020-2021: GK! Network, GK Fund, GK Market, GK! Execu-Search, and GK! Job Hub. Each tackled an aspect of economic equity; “twin pandemics” of COVID-19 and systemic racism had...  View Details
      Keywords: Diversity; Ecosystem; Inclusion; People Of Color; Network; Racial Bias; Gender Bias; Entrepreneurial Ecosystem; Entrepreneur; Change; Change Barriers; Change Leadership; Community; Innovation; Pandemic; Impact; Systemic Racism; Minority-owned Businesses; Social and Collaborative Networks; Equity; Race; Small Business; Prejudice and Bias; Boston
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      Kanter, Rosabeth Moss, Amy Chiu, and Joyce Kim. "Colette Phillips and GetKonnected!: Creating Inclusive Ecosystems." Harvard Business School Case 323-035, October 2022.
      • October 17, 2022
      • Article

      Relational Diversity in Social Portfolios Predicts Well-Being

      By: Hanne K. Collins, Serena F. Hagerty, Jordi Quoidbach, Michael I. Norton and Alison Wood Brooks
      We document a link between the relational diversity of one’s social portfolio—the richness and evenness of relationship types across one’s social interactions—and well-being. Across four distinct samples, respondents from the United States who completed a preregistered...  View Details
      Keywords: Social Interaction; Social Engagement; Well-being; Happiness; Social and Collaborative Networks; Family and Family Relationships
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      Collins, Hanne K., Serena F. Hagerty, Jordi Quoidbach, Michael I. Norton, and Alison Wood Brooks. "Relational Diversity in Social Portfolios Predicts Well-Being." Proceedings of the National Academy of Sciences 119, no. 43 (October 17, 2022).
      • 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...  View Details
      Keywords: Entrepreneurship; Institutional Innovation; Knowledge Exchange; US Postal Service; Firm Performance; Infrastructure; Expansion; Government Administration; Communication; Business History; Public Administration Industry; California
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      Marinoni, Astrid, and Maria P. Roche. "You've Got Mail! The Late 19th Century U.S. Postal Service Expansion, Entrepreneurship, and Firm Performance." Harvard Business School Working Paper, No. 23-022, October 2022.
      • October 2022
      • Case

      mPharma: Scaling Access to Affordable Primary Care in Africa

      By: Regina E. Herzlinger and Ben Creo
      mPharma CEO Greg Rockson is attempting to create the largest pan-African primary healthcare company. He must evaluate a three-year strategy potentially involving three key components: a rapid and extensive expansion of the company's network of 600 retail pharmacies in...  View Details
      Keywords: Africa; Pharmaceutical Companies; Pharmacy Benefit Manager; Health Care; Health Care And Treatment; Health Care Costs; Health Care Delivery; Health Care Entrepreneurship; Telehealth; Health Equity; Corporate Strategy; Social Entrepreneurship; Equity; Growth and Development Strategy; Expansion; Product Launch; Customer Value and Value Chain; Social Enterprise; Multinational Firms and Management; Pharmaceutical Industry; Health Industry; Africa
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      Herzlinger, Regina E., and Ben Creo. "mPharma: Scaling Access to Affordable Primary Care in Africa." Harvard Business School Case 323-033, October 2022.
      • 2022
      • Article

      Indonesia and the Third Indochina War: The End of Containment

      By: Mattias Fibiger
      The Third Indochina War called forth dramatic changes in the international relations of Southeast Asia. Foremost among these changes was a shift in the geopolitical orientation of the Association of Southeast Asian Nations (ASEAN). The organization’s founders...  View Details
      Keywords: Cold War; War; National Security; Southeast Asia; Indonesia; China
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      Fibiger, Mattias. "Indonesia and the Third Indochina War: The End of Containment." Journal of American-East Asian Relations 29, no. 3 (2022): 240–270.
      • 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...  View Details
      Keywords: Extraversion; Social Networks; Emergent Leadership; Leadership Development; Personal Characteristics; Perception
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      Landis, Blaine, Jon M. Jachimowicz, Dan J. Wang, and Robert W. Krause. "Revisiting Extraversion and Leadership Emergence: A Social Network Churn Perspective." Journal of Personality and Social Psychology 123, no. 4 (October 2022): 811–829.
      • September 16, 2022
      • Article

      A Causal Test of the Strength of Weak Ties

      By: Karthik Rajkumar, Guillaume Saint-Jacques, Iavor I. Bojinov, Erik Brynjolfsson and Sinan Aral
      The authors analyzed data from multiple large-scale randomized experiments on LinkedIn’s People You May Know algorithm, which recommends new connections to LinkedIn members, to test the extent to which weak ties increased job mobility in the world’s largest...  View Details
      Keywords: Job Mobility; Social Networks; Social Ties; Networks; Personal Development and Career
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      Rajkumar, Karthik, Guillaume Saint-Jacques, Iavor I. Bojinov, Erik Brynjolfsson, and Sinan Aral. "A Causal Test of the Strength of Weak Ties." Science 377, no. 6612 (September 16, 2022).
      • 2022
      • Working Paper

      What Do Impact Investors Do Differently?

      By: Shawn A. Cole, Leslie Jeng, Josh Lerner, Natalia Rigol and Benjamin N. Roth
      In recent years, impact investors – private investors who seek to generate simultaneously attractive financial and social returns – have attracted intense interest and controversy. We analyze a novel, comprehensive data set of impact and traditional investors to assess...  View Details
      Keywords: ESG; Socially Responsible Investing; Investment Decisions; Public Goods; Impact Investment; Investment; Private Equity; Venture Capital
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      Cole, Shawn A., Leslie Jeng, Josh Lerner, Natalia Rigol, and Benjamin N. Roth. "What Do Impact Investors Do Differently?" Working Paper, September 2022.
      • August 2022
      • Case

      NewLab: Scaling an Innovation Engine

      By: Tarun Khanna and George Gonzalez
      Silicon Valley-veteran Shaun Stewart is the CEO of NewLab, a dynamic technology hub headquartered in the storied Brooklyn Navy Yard. Founded in 2016, NewLab fostered a community of entrepreneurs, corporate and government partners, and investors, all seeking to apply...  View Details
      Keywords: Entrepreneurship; Social and Collaborative Networks; Global Range; Partners and Partnerships; Networks; Growth and Development Strategy; Opportunities; Brooklyn
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      Khanna, Tarun, and George Gonzalez. "NewLab: Scaling an Innovation Engine." Harvard Business School Case 723-364, August 2022.
      • August 2022
      • Background Note

      Retail Media Networks

      By: Eva Ascarza, Ayelet Israeli and Celine Chammas
      In 2022, retail media was one of the fastest growing segments in digital advertising. A retail media network (RMN) allows a retailer to use its assets for advertising. Retailers set up an advertising business by allowing marketers to buy advertising space across their...  View Details
      Keywords: Advertisers; Advertising Media; Media And Broadcasting Industry; Retail; Retail Analytics; Retail Promotion; Retailing; Ecommerce; E-Commerce Strategy; E-commerce; Marketing Communication; Targeting; Targeted Advertising; Targeted Marketing; Advertising; Marketing; Marketing Communications; Marketing Strategy; Brands and Branding; Media; Marketing Channels; Retail Industry; Consumer Products Industry; Advertising Industry; United States
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      Ascarza, Eva, Ayelet Israeli, and Celine Chammas. "Retail Media Networks." Harvard Business School Background Note 523-029, August 2022.
      • August 2022 (Revised August 2022)
      • Case

      Braintrust: The Blockchain-Powered Talent Network

      By: Christopher Stanton, Joseph B. Fuller and George Gonzalez
      A San Francisco startup seeks to disrupt the freelancing industry through its user-owned talent network powered by the cryptocurrency, BTRST.  View Details
      Keywords: Freelancers; Blockchain; Cryptocurrency; Social and Collaborative Networks; Talent and Talent Management; Consulting Industry; Technology Industry; United States
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      Stanton, Christopher, Joseph B. Fuller, and George Gonzalez. "Braintrust: The Blockchain-Powered Talent Network." Harvard Business School Case 823-039, August 2022. (Revised August 2022.)
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