Some economists believe that the study of economic policy demands the use of a taxonomic/classificatory approach.
The international and national taxonomies are used by official statistical agencies.
United Nations provide its International Standard Industrial Classification (ISIC) as a base for establishing regional taxonomies: The proprietary taxonomies are often used in the financial services industry to group similar investment vehicles and to construct sectorial stock market indices.
Pavitt's Taxonomy classifies firms by their principal sources of innovation.
MasterFormat provides a taxonomy for organizing construction projects with the primary unit of differentiation consisting of a binary fail/no-fail tag.