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    • News  (12)
    • Research  (112)
    • Multimedia  (1)
  • Faculty Publications  (85)

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  • All HBS Web  (126)
    • News  (12)
    • Research  (112)
    • Multimedia  (1)
  • Faculty Publications  (85)
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  • January 2007 (Revised October 2007)
  • Case

Procter & Gamble: Organization 2005 (A)

By: Mikolaj Jan Piskorski and Alessandro L. Spadini
In response to a huge crisis in 2000, the new CEO of Procter & Gamble has to decide whether to continue with an unusual organizational design or to revert to the old matrix organization. Describes all the organizational designs used by Procter & Gamble from the 1920s... View Details
Keywords: Global Strategy; Globalized Firms and Management; Organizational Design; Organizational Structure
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Piskorski, Mikolaj Jan, and Alessandro L. Spadini. "Procter & Gamble: Organization 2005 (A)." Harvard Business School Case 707-519, January 2007. (Revised October 2007.)
  • 2007
  • Other Unpublished Work

Positions of Power and Status: Reciprocity in the Venture Capital Industry

By: Mikolaj Jan Piskorski
This paper proposes a straightforward way of differentiating between central network positions that confer power from those that confer status. I argue that actors achieve high status by receiving numerous exchanges from actors who receive numerous exchanges from... View Details
Keywords: Venture Capital; Power and Influence; Opportunities; Status and Position
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Piskorski, Mikolaj Jan. "Positions of Power and Status: Reciprocity in the Venture Capital Industry." March 2007.
  • July 2008
  • Case

eHarmony

By: Mikolaj Jan Piskorski, Hanna Halaburda and Troy Smith
eHarmony's CEO needs to decide how to react to imitations of its business model, encroachment by competing models, and ascendance of free substitutes. The case provides four options to address these threats and asks students to choose one after they analyzed the... View Details
Keywords: Business Model; Decision Choices and Conditions; Growth and Development Strategy; Industry Structures; Competitive Strategy; Competitive Advantage; Service Industry
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Piskorski, Mikolaj Jan, Hanna Halaburda, and Troy Smith. "eHarmony." Harvard Business School Case 709-424, July 2008.
  • April 2009
  • Case

Young Presidents' Organization

By: Mikolaj Jan Piskorski, John D. Macomber and David Chen
The board of Young Presidents' Organization needs to decide on the future of its Networks Initiative, designed to connect its geographically dispersed membership base through 60 different interest-based networks. So far, one half of these networks have been considered... View Details
Keywords: Decision Choices and Conditions; Governing and Advisory Boards; Leadership Development; Growth and Development Strategy; Organizations; Social and Collaborative Networks
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Piskorski, Mikolaj Jan, John D. Macomber, and David Chen. "Young Presidents' Organization." Harvard Business School Case 709-444, April 2009.
  • 2011
  • Other Unpublished Work

Networks as Covers: Evidence from On-Line Social Networks

By: Mikolaj Jan Piskorski
Sociologists have extensively documented that networks influence market exchange through improved matching and vouching. In this paper, I propose that networks can also blunt the signal of market participation, as actors who are on the market surrounded by their... View Details
Keywords: Job Search; Knowledge Use and Leverage; Market Participation; Market Transactions; Social and Collaborative Networks; Online Technology
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Piskorski, Mikolaj Jan. "Networks as Covers: Evidence from On-Line Social Networks." September 2011.
  • 2008
  • Working Paper

Positions of Power and Status: Reciprocity in the Venture Capital Industry

By: Mikolaj J. Piskorski
This paper proposes a straightforward way of differentiating between central network positions that confer power and those that confer status. I argue that actors achieve high status by receiving numerous exchanges from actors who in turn receive numerous exchanges... View Details
Keywords: Venture Capital; Partners and Partnerships; Power and Influence; Social and Collaborative Networks; Status and Position; Financial Services Industry; United States
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Piskorski, Mikolaj J. "Positions of Power and Status: Reciprocity in the Venture Capital Industry." Harvard Business School Working Paper, No. 08-068, February 2008.
  • 2008
  • Working Paper

I Am Not on the Market, I Am Here with Friends: Using On-Line Social Networks to Find a Job or a Spouse

By: Mikolaj Jan Piskorski
Sociologists have extensively documented that networks influence market exchange through improved matching and vouching. In this paper, I propose that networks can also blunt the signal of market participation, as actors who are on the market surrounded by their... View Details
Keywords: Job Search; Knowledge Use and Leverage; Market Participation; Market Transactions; Social and Collaborative Networks; Online Technology
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Piskorski, Mikolaj Jan. "I Am Not on the Market, I Am Here with Friends: Using On-Line Social Networks to Find a Job or a Spouse." Harvard Business School Working Paper, No. 08-088, April 2008.
  • February 2008 (Revised March 2008)
  • Teaching Note

LinkedIn (TN) (A) and (B)

By: Mikolaj Jan Piskorski
In the summer of 2005, LinkedIn, a two-year-old start-up, was choosing between two options to monetize its 5 million business people network. Members could contact each other through trusted intermediaries on the network to offer or seek jobs, consulting engagements,... View Details
Keywords: Business Startups; Social and Collaborative Networks; Internet and the Web; Financing and Loans; Revenue; Design; Service Operations
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Piskorski, Mikolaj Jan. "LinkedIn (TN) (A) and (B)." Harvard Business School Teaching Note 708-406, March 2008. (Revised from original February 2008 version.)
  • 2008
  • Working Paper

Structural Closure and Exposure: Formation of Structural Inequality in Managerial Labor Markets

By: Mikolaj Jan Piskorski
Positional advantages arise when actors obtain rewards attached to positions they occupy, but these rewards are not merited by their performance. Existing theory suggests that in competitive markets there should be no positional advantages. This paper proposes a model... View Details
Keywords: Compensation and Benefits; Jobs and Positions; Managerial Roles; Performance Improvement; Alignment; Competitive Advantage; Equality and Inequality
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Piskorski, Mikolaj Jan. "Structural Closure and Exposure: Formation of Structural Inequality in Managerial Labor Markets." Harvard Business School Working Paper, No. 08-086, April 2008.
  • January 2010 (Revised February 2012)
  • Case

Meetup

By: Mikolaj Jan Piskorski and David Chen
Meetup, an on-line company providing means of arranging face-to-face meetings, is deciding between two options of increasing its revenue by investing to: (i) increase new sign ups, (ii) improve the engagement of existing users. View Details
Keywords: Business Growth and Maturation; Decision Choices and Conditions; Business Strategy; Web Services Industry
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Piskorski, Mikolaj Jan, and David Chen. "Meetup." Harvard Business School Case 710-408, January 2010. (Revised February 2012.)
  • 2008
  • Working Paper

Structural Closure and Exposure: Market Reactions to Announcements of Acquisitions and Divestitures

By: Mikolaj Jan Piskorski and Nitin Nohria
This paper develops an exchange-network perspective on corporate diversification and proposes two measures of corporate scope: structural closure and structural exposure. Structural closure focuses on exchanges of goods and services inside the firm... View Details
Keywords: Mergers and Acquisitions; Market Transactions; Diversification; Boundaries; Valuation
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Piskorski, Mikolaj Jan, and Nitin Nohria. "Structural Closure and Exposure: Market Reactions to Announcements of Acquisitions and Divestitures." Harvard Business School Working Paper, No. 08-087, April 2008.
  • 2013
  • Working Paper

Networks as Covers: Evidence from an On-Line Social Network

By: Mikolaj Jan Piskorski
This paper proposes that networks give actors a cover by giving them the excuse of sociability to engage in normatively prohibited market behaviors. I apply this hypothesis to actors in long-term exclusive relationships who are surreptitiously seeking new relationships... View Details
Keywords: Strategy; Behavior; Ethics; Relationships; Social and Collaborative Networks
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Piskorski, Mikolaj Jan. "Networks as Covers: Evidence from an On-Line Social Network." Harvard Business School Working Paper, No. 13-083, March 2013.
  • 2014
  • Book

A Social Strategy: How We Profit from Social Media

By: Mikolaj Jan Piskorski
Almost no one had heard of social media a decade ago, but today websites such as Facebook, Twitter, and LinkedIn have more than 1 billion users and account for almost 25 percent of Internet use. Practically overnight, social media seems indispensable to our lives—from... View Details
Keywords: Internet and the Web; Web; Strategy; Marketing Strategy; Social Marketing
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Piskorski, Mikolaj Jan. A Social Strategy: How We Profit from Social Media. Princeton University Press, 2014.
  • April 2012 (Revised March 2014)
  • Case

Social Strategy at Nike

By: Mikolaj Jan Piskorski and Ryan Johnson
Nike, which first started experimenting with social media and networking in 2004, has been consistently reducing its spending on traditional advertising. Yet, Nike has not pulled back on its overall marketing budget, instead opting to focus on "nontraditional"... View Details
Keywords: Strategy; Advertising Campaigns; Social and Collaborative Networks; Online Advertising; Apparel and Accessories Industry; Sports Industry
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Piskorski, Mikolaj Jan, and Ryan Johnson. "Social Strategy at Nike." Harvard Business School Case 712-484, April 2012. (Revised March 2014.)
  • 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
Keywords: Social Influence; Social Network; Mobile App; Peer Effects; Latent Homophily; Latent Space; Proxy Variables; Familiarity; Behavior; Consumer Behavior; Applications and Software; Social and Collaborative Networks; Mobile and Wireless Technology; Power and Influence; Social Media
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Davin, Joseph P., Sunil Gupta, and Mikolaj Jan Piskorski. "Separating Homophily and Peer Influence with Latent Space." Harvard Business School Working Paper, No. 14-053, January 2014.
  • March 2009 (Revised September 2013)
  • Case

Yelp

By: Mikolaj Jan Piskorski, David Chen and Aaron Smith
Yelp was a popular online destination for reviews of local establishments, written by volunteer Internet users and read by 60 million people per month. However, the company was far from profitable. The CEO needs to decide between two options to increase the revenue.... View Details
Keywords: Digital Marketing; Business Model; Profit; Revenue; Marketing Strategy; Sales; Internet and the Web; Advertising Industry
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Piskorski, Mikolaj Jan, David Chen, and Aaron Smith. "Yelp." Harvard Business School Case 709-412, March 2009. (Revised September 2013.)
  • September 2006 (Revised February 2007)
  • Case

Friendster (A)

By: Mikolaj Jan Piskorski and Carin-Isabel Knoop
In January 2006, the president of Friendster needs to choose between two strategic options to revive the company. Friendster started the social networking industry in 2003, but has been overtaken by MySpace and Facebook. The two options are: 1) offer new features to... View Details
Keywords: Value Creation; Competitive Advantage; Corporate Entrepreneurship; Social and Collaborative Networks; Brands and Branding; Service Industry
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Piskorski, Mikolaj Jan, and Carin-Isabel Knoop. "Friendster (A)." Harvard Business School Case 707-409, September 2006. (Revised February 2007.)
  • Article

Power Imbalance, Mutual Dependence and Constraint Absorption: A Closer Look at Resource Dependence Theory

By: Tiziana Casciaro and Mikolaj Jan Piskorski
Despite ubiquitous references to Pfeffer and Salancik's classic volume, The External Control of Organizations, resource dependence theory is more of an appealing metaphor than a foundation for testable empirical research. We argue that several ambiguities in the... View Details
Keywords: Power and Influence; Theory
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Casciaro, Tiziana, and Mikolaj Jan Piskorski. "Power Imbalance, Mutual Dependence and Constraint Absorption: A Closer Look at Resource Dependence Theory." Administrative Science Quarterly 50, no. 2 (June 2005): 167–199.
  • 20 Sep 2011
  • First Look

First Look: September 20

more likely to involve collaboration across locations, particularly with inventors from the firm's primary R&D site. Our results suggest that R&D dynamics in clusters are heavily influenced by multi-location firms with innovative... View Details
Keywords: Sean Silverthorne
  • 10 Aug 2010
  • First Look

First Look: August 10

recipients' actual trustworthiness. This lax approach gives rise to adverse selection: the sites that seek and obtain trust certifications are actually less trustworthy than others. Using an original dataset on web site safety, I demonstrate that sites certified View Details
Keywords: Martha Lagace
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