P4 Other Economic Systems
- P40 General
- P41 Planning, Coordination, and Reform
- P42 Productive Enterprises; Factor and Product Markets; Prices; Population
- P43 Public Economics; Financial Economics (1)
- P44 National Income, Product, and Expenditure; Money; Inflation
- P45 International Trade, Finance, Investment, and Aid
- P46 Consumer Economics; Welfare and Poverty
- P47 Performance and Prospects
- P48 Political Economy; Legal Institutions; Property Rights (1)
- P49 Other (1)