Publications

2022
Working Paper

Social Protection and Social Distancing During the Pandemic: Mobile Money Transfers in Ghana

By: Dean Karlan, Matt Lowe, Robert Osei, Isaac Osei-Akoto, Benjamin N. Roth and Christopher Udry

We study the impact of mobile money transfers to a representative sample of low-income Ghanaians during the COVID-19 pandemic. The announcement of the upcoming transfers affects neither consumption, well-being, nor social distancing. Once disbursed,... View Details

Keywords: Social Distancing; Social Welfare; Economic Relief; Health Pandemics; Poverty

June 2011 (Revised June 2012)
Case

Sephora Direct: Investing in Social Media, Video, and Mobile

By: Elie Ofek and Alison Berkley Wagonfeld

Julie Bornstein, senior vice president of Sephora Direct, is seeking to double her budget for social media and other digital marketing initiatives for 2011. A number of digital efforts implemented in the past two years seem to be bearing fruit and there is a desire to... View Details

Keywords: History; Leadership; Marketing Strategy; Marketing; Emerging Markets; Investment Return; Investment Funds; Budgets and Budgeting

September 2022
Article

Health Externalities and Policy: The Role of Social Preferences

By: Laura Alfaro, Ester Faia, Nora Lamersdorf and Farzad Saidi

Social preferences facilitate the internalization of health externalities, for example by reducing mobility during a pandemic. We test this hypothesis using mobility data from 258 cities worldwide alongside experimentally validated measures of social preferences.... View Details

Keywords: Social Preferences; Pandemics; Mobility; Health Externalities; Mitigation Policies; Health Pandemics; Cooperation; Behavior; Policy

November 30, 2010
Article

Seven Social Transformations Unleashed by Mobile Devices

By: Jeffrey F. Rayport

Keywords: Technology; Digital Services; Strategy; Internet and the Web; Marketing

Article

Beyond the Target Customer: Social Effects in CRM Campaigns

By: Eva Ascarza, Peter Ebbes, Oded Netzer and Matthew Danielson

Customer relationship management (CRM) campaigns have traditionally focused on maximizing the profitability of the targeted customers. The authors demonstrate that in business settings characterized by network externalities, a CRM campaign that is aimed at changing the... View Details

Keywords: Social Effects; Field Experiment; Mobile; Customer Relationship Management; Network Effects; Consumer Behavior

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2020
Working Paper

Social Interactions in Pandemics: Fear, Altruism, and Reciprocity

By: Laura Alfaro, Ester Faia, Nora Lamersdorf and Farzad Saidi

In SIR models, homogeneous or with a network structure, infection rates are assumed to be exogenous. However, individuals adjust their behavior. Using daily data for 89 cities worldwide, we document that mobility falls in response to fear, as approximated by Google... View Details

Keywords: Social Interactions; Pandemics; Mobility; Cities; SIR Networks; Social Preferences; Social Planner; Targeted Policies; Health Pandemics; Interpersonal Communication; Behavior; Policy

June 2012
Teaching Note

Sephora Direct: Investing in Social Media, Video, and Mobile (TN)

By: Elie Ofek

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

13 Jun 2011
HBS Case

Mobile Banking for the Unbanked

In many developing countries it's common for a person to have a mobile phone but not a bank account. In fact, more than 1 billion people fit this description, and the number is only likely to increase. To that end, many companies are... View Details

Keywords: by Carmen Nobel; Banking; Communications; Telecommunications

2018
Article

Threat of Platform-Owner Entry and Complementor Responses: Evidence from the Mobile App Market

By: Wen Wen and Feng Zhu

We examine how app developers on the Android mobile platform adjust their innovation efforts (rate and direction) and value-capture strategies in response to Google’s entry threat and actual entry into their markets. We find that, after Google’s entry threat increases,... View Details

Keywords: Platform-owner Entry; Entry Threat; Innovation; Complementors; Mobile App Industry; Digital Platforms; Mobile and Wireless Technology; Market Entry and Exit; Price; Innovation and Invention; Applications and Software

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June 1997 (Revised May 1998)
Case

Mobil USM&R (A2)

By: Robert S. Kaplan

Second of a two-part case on the development and use of a Balanced Scorecard (BSC) at Mobil's US Marketing and Refining Division. This case describes the completed BSC, and how this was linked to the BSCs of the independent business units and the internal service... View Details

Keywords: Balanced Scorecard; Performance Evaluation; Management Teams; Management Practices and Processes; Executive Compensation; Motivation and Incentives; Corporate Strategy; Energy Industry; Mining Industry; United States

2017
Working Paper

Threat of Platform-Owner Entry and Complementor Responses: Evidence from the Mobile App Market

By: Feng Zhu

We examine how app developers on the Android mobile platform adjust their innovation efforts (rate and direction) and value-capture strategies in response to Google’s entry threat and actual entry into their markets. We find that, after Google’s entry threat increases,... View Details

Keywords: Platform-owner Entry; Entry Threat; Innovation; Complementors; Mobile App Industry; Mobile and Wireless Technology; Innovation Strategy; Market Entry and Exit

May 2012
Case

BoldFlash: Cross-Functional Challenges in the Mobile Division

By: Michael Beer and Rachel Shelton

Roger Cahill has spent less than a year as head of the Mobile Division of BoldFlash, a flash memory component maker. On the corporate level, BoldFlash has adapted to an evolving and difficult marketplace, but the Mobile Division is struggling. The four groups within... View Details

Keywords: United States; Massachusetts; Morale; Human Resource Management; Technology; Leadership; Opportunities; Organizational Design; Conflict and Resolution; Product Development; Change Management; Information Infrastructure; Business Processes; Manufacturing Industry; Electronics Industry; Massachusetts

June 1997 (Revised May 1998)
Case

Mobil USM&R (A1)

By: Robert S. Kaplan

First of a two-part case on the development and use of a Balanced Scorecard (BSC) at Mobil's US Marketing and Refining Division. Split from the original (A) case to give students an opportunity to suggest objectives and measures for the division's initial BSC, without... View Details

Keywords: Balanced Scorecard; Measurement and Metrics; Restructuring; Corporate Strategy; Organizational Change and Adaptation; Growth and Development Strategy; Management Teams; Marketing Strategy; Motivation and Incentives; Mining Industry; Energy Industry; United States

March 2013
Article

For Mobile Devices, Think Apps, Not Ads

By: Sunil Gupta

Many companies envision mobile ads becoming an integral part of their communications strategies. But there's a growing consensus that ads don't work on mobile devices; consumers just don't like them. Instead of creating tiny banner ads, smart marketers will turn to... View Details

Keywords: Applications and Software; Advertising; Mobile and Wireless Technology; Innovation and Invention

2017
Working Paper

Voter Mobilization and Trust in Electoral Institutions: Evidence from Kenya

By: Benjamin Marx, Vincent Pons and Tavneet Suri

Voter mobilization campaigns face trade-offs in young democracies. In a large-scale experiment implemented in 2013 with the Kenyan Electoral Commission (IEBC), text messages intended to mobilize voters boosted participation but also decreased trust in electoral... View Details

Keywords: Political Participation; Electoral Institutions; Field Experiment; Voting; Political Elections; Behavior; Trust; Kenya

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September 2021 (Revised February 2023)
Case

Harambe: Mobilizing Capital in Africa

By: Anywhere (Siko) Sikochi, Dilyana Karadzhova Botha and Francesco Tronci

Harambe was a non-profit organization whose mission was to build an ecosystem to identify promising young African entrepreneurs and provide them access to training, markets, capital, and support networks. From 2007 to 2021, Harambe had grown to a network of 367... View Details

Keywords: Entrepreneurship; Nonprofit Organizations; Business Model; Strategy; Organizational Structure; Business Startups; Capital; Venture Capital; Social and Collaborative Networks; Networks; Developing Countries and Economies; Emerging Markets; Africa; South Africa

2015
Working Paper

Mobile Money Services—Design and Development for Financial Inclusion

By: Rajiv Lal and Ishan Sachdev

Mobile money services are being deployed rapidly across emerging markets as a key tool to further the goal of financial inclusion. Financial inclusion, the development of novel methods to enable individuals at the base of the pyramid to access formal financial services... View Details

Keywords: Social Marketing; Poverty; Emerging Markets; Product Launch; Economic Growth; Financial Services Industry

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