Fig. 5

Shannon’s diversity of antichains in a Price model with planned partition of nodes into five fields for networks of 5,000 nodes. Each node is assigned to a field sequentially and nine times out of ten a new node chooses to connect to an existing node of the same field, with a preference for large degree nodes, ϕ=0.9. Each new node attaches to m=3 older nodes. Each point represents an antichain in a given partition, with the average height or depth of nodes in the antichain and Diversity. Four different types of antichain partition are shown: a - successors-based siblinarity antichains, b - height-based antichains, c - predecessors-based siblinarity antichains, d - depth-based antichains. The height and depth antichains are clearly much bigger (few points on their plots) but much less diverse, with their diversity close to the theoretical maximum 10.0. On the other hand, the siblinarity antichains based on co-citation similarity (a) or bibliometric coupling (b) are drawn largely from the same field with diversities close to the minimum value of 1.0