P2 Socialist Systems and Transitional Economies
- P20 General
- P21 Planning, Coordination, and Reform
- P22 Prices
- P23 Factor and Product Markets; Industry Studies; Population
- P24 National Income, Product, and Expenditure; Money; Inflation
- P25 Urban, Rural, and Regional Economics
- P26 Political Economy; Property Rights
- P27 Performance and Prospects
- P28 Natural Resources; Energy; Environment
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P29 Other
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