This document discusses blockmodeling, an exploratory social network analysis technique. It defines key terms like adjacency matrix and incident matrix. It describes different types of structural equivalence that can be used to define clusters in a network, including regular equivalence where each member in a block is connected to at least one other member of the block. An example of applying blockmodeling to analyze metal exportation networks is provided. The document also gives instructions for performing various blockmodeling operations and analyses in UCINET.

1. Blockmodels
Exploratory Social Network Analysis, Part V, Chapter XII

2. Modeling View Change

3. What’s the Advantage?

4. Definitions
• Adjacency Matrix
• Incident Matrix  2-Mode Nets
• Isomorphic Network  Renumbering
• Permutation

5. Structural Equivalence
• Complete Block
• Null Block
• Image Matrix
Defining the Clusters Blocks
Core Periphery
Core Complete Complete
Periphery Complete Null with Error
Shrunk Net Image Matrix

6. Dissimilarity
Dendrogram: hierarchical clustering
Dissimilarity Score

7. Example: Metal Exportation

8. Generalized Equivalence
Generalized Blockmodeling
Regular Equivalence
• A regular block contains at least one arc in each row and in each column
• Example:
All the Ministers Advise PM
Advisors Must Advise at Least 1 Minister
User Defined

9. Adjacency Matrix
Double Click
Permutations:
Operations > Partition + Permutation > Reorder Partition & Partition > Make a Permutation
Dissimilarity
Cluster > Create Complete Cluster.
Operations > Network + Cluster > Dissimilarity.
Operations > Network + Cluster > Dissimilarity > Network based > Options > Report Matrix
Blockmodeling
Network > Create Partition > Blockmodeling*
Partitions > Info > Cramer’s V, Rajski.