Census of firms in 1427 catasto. See Padgett and McLean (2007), “Economic Credit in Renaissance Florence” for description and analysis of the commercial credit relations among these firms. Download the data.

R code for determining structurally cohesive network blocks. Download the source code.
(also included in the standard igraph package for the R statistical Language)

R code for hypercycles model presented in “Economic Production as Chemistry” and “Economic Production as Chemistry II”. Download here.