One-point correlations are the correlations between indegree and outdegree of a node of a directed network. Nodes with large indegree are hubs, nodes with large outdegree are authorities. To calculate the correlation between indegree and outdegree is a way to check whether hubs are also authorities or not.
Pros & Cons
The network to analyze must be directed, otherwise there are no special constraints.
Useful in many contexts. As an example, for the World Wide Web, the study of one-point correlations allows to address the question: are the most linked URLs also the ones that link more pages?
The algorithm was implemented and documented by S. Fortunato, integrated by S. Fortunato and W. Huang.
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