property Database.default_clusters

Return the automatically generated default shock clusters.

Each set’s "all" cluster retains the representation and membership given by get_index(). Common classifications keep their existing ordered lists; regional classifications use dictionaries of regional lists. Geographic Region clusters remain available.

For example, if the commodity domains are {"IT": ["C1", "C2"], "DE": ["C1"]}, the automatic cluster is:

db.default_clusters["Commodity"]["all"]
# {"IT": ["C1", "C2"], "DE": ["C1"]}

Empty regions appear with empty lists. Cluster expansion selects existing region-item pairs, so C2 is not selected in Germany. Default cluster generation does not compute matrices. Mutating returned nested lists does not change the database.

See the clusters guide for examples.