Where do networks come from?

The key assumption underlying both the peer effects and structural approaches to network effects assume some degree of exogeneity in the existence and structure of network ties. Exogeneity is both a theoretical claim as well as an empirical assumption. All reasonable theories are built on a set of axioms that assume some primitive or exogenous features of the world […]

Seeing the networks in your company

Thus far we have assumed that we had network data. But data like the “Professionals” was gathered using a survey in a real organization. In this post I will walk you through the process of creating a simple network survey in SurveyMonkey (a web based survey application) and analyzing the responses from the survey using R. […]

Peer effects, knowledge transfer and social influence

The structural approach to social networks is inherently beautiful as a representational approach. I am always in awe of the fact that we can learn so much about how human beings act or their outcomes based merely on the pattern of their social ties. The idea is both simple and profound. The structural approach is built on assumptions regarding […]

Ideas on entrepreneurship, innovation and social networks

Here you will find some of my research, summaries of recent trends and topics in business research, and educational materials I’ve used or developed for my MBA and PhD classes. I focus on social network analysis, innovation and entrepreneurship. Here are some relevant posts: Social Network Analysis Class Syllabi PhD: Topics in Social Network Analysis MBA: Managing Social […]

Analyzing Networks in R: Centrality and Graphing

One important procedure in network analysis is determining the centrality of a node within a social network. In this post, I will show you how to do four things: Calculate four centrality measures Closeness centrality Betweenness centrality Degree centrality (indegree and outdegree) Eigenvector centrality Symmetrize social networks Plot social networks using the gplot function in R. Correlate […]

The organization behind the chart, an assignment.

Network analysis has permeated the analytical toolbox of many of the world’s most innovative companies. Firms, both large and small, have begun to use the tools of social network analysis (SNA) to understand the collaborative structure within their organizations and the collaborative and competitive structures in their respective markets. In the early days of SNA […]

Creating value for others

One of the most important resources you have for creating value is your social network. And one of the most important ways that you can create value is by understanding the goals and needs of people you know and using your own network to help them meet those goals in ways that only you can […]