- N26 - Economic History: Financial Markets and Institutions: Latin America; Caribbean1
- N33 - Economic History: Labor and Consumers, Demography, Education, Health, Welfare, Income, Wealth, Religion, and Philanthropy: Europe: Pre-19131
- N41 - Economic History: Government, War, Law, International Relations, and Regulation: U.S.; Canada: Pre-19131
- N42 - Economic History: Government, War, Law, International Relations, and Regulation: U.S.; Canada: 1913-1
- N43 - Economic History: Government, War, Law, International Relations, and Regulation: Europe: Pre-19131
- N44 - Economic History: Government, War, Law, International Relations, and Regulation: Europe: 1913-1
- N56 - Economic History: Agriculture, Natural Resources, Environment, and Extractive Industries: Latin America; Caribbean1
- N60 - Economic History: Manufacturing and Construction: General, International, or Comparative1
- N61 - Economic History: Manufacturing and Construction: U.S.; Canada: Pre-19131
- N62 - Economic History: Manufacturing and Construction: U.S.; Canada: 1913-1
- N70 - Economic History: Transport, International and Domestic Trade, Energy, Technology, and Other Services: General, International, or Comparative1
- N71 - Economic History: Transport, Trade, Energy, Technology, and Other Services: U.S.; Canada: Pre-19131
- N72 - Economic History: Transport, Trade, Energy, Technology, and Other Services: U.S.; Canada: 1913-1
- N90 - Regional and Urban History: General1
- N91 - Regional and Urban History: U.S.; Canada: Pre-19131
- N92 - Regional and Urban History: U.S.; Canada: 1913-1
- O10 - Economic development - General1
- O11 - Economic development - Macroeconomic analyses of economic development1
- O17 - Formal and Informal Sectors; Shadow Economy; Institutional Arrangements1
- O21 - Planning Models; Planning Policy1