rolling 10-year window: • e.g. the 1640 subgraph contains only edges and nodes extant between 1635 and 1645 • Edges (prints) exist between the start and end dates ascribed to an object o Edges are unweighted to avoid biasing edge strength based on the number of surviving impressions (complicated!) • Nodes (artists) exist during their life dates (also complicated!) 2. For each subgraph, calculate network metrics at the global, regional/national, and individual scale Dynamic network analysis