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A: General Economics and Teaching
- A1: General Economics
  - A10: General
  - A11: Role of Economics; Role of Economists; Market for Economists
  - A12: Relation of Economics to Other Disciplines
  - A13: Relation of Economics to Social Values
  - A14: Sociology of Economics
  - A19: Other
- A2: Economics Education and Teaching of Economics
  - A20: General
  - A21: Pre-college
  - A22: Undergraduate
  - A23: Graduate
  - A29: Other
- A3: Collective Works
  - A30: General
  - A31: Collected Writings of Individuals
  - A32: Volumes
  - A33: Handbooks
  - A39: Other
B: Schools of Economic Thought and Methodology
- B0: General
  - B00: General
- B1: History of Economic Thought through 1925
  - B10: General
  - B11: Preclassical
  - B12: Classical
  - B13: Neoclassical through 1925
  - B14: Socialist; Marxist
  - B15: Historical; Institutional
  - B16: History of Economic Thought: Quantitative and Mathematical
  - B19: Other
- B2: History of Economic Thought since 1925
  - B20: General
  - B21: Microeconomics
  - B22: Macroeconomics
  - B23: History of Economic Thought: Econometrics; Quantitative and Mathematical Studies
  - B24: Socialist; Marxist; Sraffian
  - B25: Historical; Institutional; Evolutionary; Austrian
  - B29: Other
- B3: History of Thought: Individuals
  - B30: General
  - B31: Individuals
  - B32: Obituaries
- B4: Economic Methodology
  - B40: General
  - B41: Economic Methodology
  - B49: Other
- B5: Current Heterodox Approaches
  - B50: General
  - B51: Socialist; Marxian; Sraffian
  - B52: Institutional; Evolutionary
  - B53: Austrian
  - B54: Feminist Economics
  - B59: Other
C: Mathematical and Quantitative Methods
- C0: General
  - C00: General
  - C01: Econometrics
  - C02: Mathematical Methods
- C1: Econometric and Statistical Methods: General
  - C10: General
  - C11: Bayesian Analysis
  - C12: Hypothesis Testing
  - C13: Estimation
  - C14: Semiparametric and Nonparametric Methods
  - C15: Simulation Methods
  - C16: Specific Distributions
  - C19: Other
- C2: Single Equation Models; Single Variables
  - C20: General
  - C21: Cross-Sectional Models; Spatial Models; Treatment Effect Models
  - C22: Time-Series Models
  - C23: Models with Panel Data
  - C24: Truncated and Censored Models
  - C25: Discrete Regression and Qualitative Choice Models
  - C29: Other
- C3: Multiple or Simultaneous Equation Models
  - C30: General
  - C31: Cross-Sectional Models; Spatial Models; Treatment Effect Models
  - C32: Time-Series Models
  - C33: Models with Panel Data
  - C34: Truncated and Censored Models
  - C35: Discrete Regression and Qualitative Choice Models
  - C39: Other
- C4: Econometric and Statistical Methods: Special Topics
  - C40: General
  - C41: Duration Analysis
  - C42: Survey Methods
  - C43: Index Numbers and Aggregation
  - C44: Statistical Decision Theory; Operations Research
  - C45: Neural Networks and Related Topics
  - C46: Specific Distributions
  - C49: Other
- C5: Econometric Modeling
  - C50: General
  - C51: Model Construction and Estimation
  - C52: Model Evaluation and Selection
  - C53: Forecasting and Other Model Applications
  - C59: Other
- C6: Mathematical Methods and Programming
  - C60: General
  - C61: Optimization Techniques; Programming Models; Dynamic Analysis
  - C62: Existence and Stability Conditions of Equilibrium
  - C63: Computational Techniques
  - C65: Miscellaneous Mathematical Tools
  - C67: Input-Output Models
  - C68: Computable General Equilibrium Models
  - C69: Other
- C7: Game Theory and Bargaining Theory
  - C70: General
  - C71: Cooperative Games
  - C72: Noncooperative Games
  - C73: Stochastic and Dynamic Games; Evolutionary Games; Repeated Games
  - C78: Bargaining Theory; Matching Theory
  - C79: Other
- C8: Data Collection and Data Estimation Methodology; Computer Programs
  - C80: General
  - C81: Methodology for Collecting, Estimating, and Organizing Microeconomic Data
  - C82: Methodology for Collecting, Estimating, and Organizing Macroeconomic Data
  - C87: Econometric Software
  - C88: Other Computer Software
  - C89: Other
- C9: Design of Experiments
  - C90: General
  - C91: Laboratory, Individual Behavior
  - C92: Laboratory, Group Behavior
  - C93: Field Experiments
  - C99: Other
D: Microeconomics
- D0: General
  - D00: General
  - D01: Microeconomic Behavior: Underlying Principles
  - D02: Institutions: Design, Formation, and Operations
- D1: Household Behavior and Family Economics
  - D10: General
  - D11: Consumer Economics: Theory
  - D12: Consumer Economics: Empirical Analysis
  - D13: Household Production and Intrahousehold Allocation
  - D14: Personal Finance
  - D18: Consumer Protection
  - D19: Other
- D2: Production and Organizations
  - D20: General
  - D21: Firm Behavior
  - D23: Organizational Behavior; Transaction Costs; Property Rights
  - D24: Production; Cost; Capital and Total Factor Productivity; Capacity
  - D29: Other
- D3: Distribution
  - D30: General
  - D31: Personal Income, Wealth, and Their Distributions
  - D33: Factor Income Distribution
  - D39: Other
- D4: Market Structure and Pricing
  - D40: General
  - D41: Perfect Competition
  - D42: Monopoly
  - D43: Oligopoly and Other Forms of Market Imperfection
  - D44: Auctions
  - D45: Rationing; Licensing
  - D46: Value Theory
  - D49: Other
- D5: General Equilibrium and Disequilibrium
  - D50: General
  - D51: Exchange and Production Economies
  - D52: Incomplete Markets
  - D53: Financial Markets
  - D57: Input-Output Tables and Analysis
  - D58: Computable and Other Applied General Equilibrium Models
  - D59: Other
- D6: Welfare Economics
  - D60: General
  - D61: Allocative Efficiency; Cost-Benefit Analysis
  - D62: Externalities
  - D63: Equity, Justice, Inequality, and Other Normative Criteria and Measurement
  - D64: Altruism
  - D69: Other
- D7: Analysis of Collective Decision-Making
  - D70: General
  - D71: Social Choice; Clubs; Committees; Associations
  - D72: Models of Political Processes: Rent-Seeking, Elections, Legislatures, and Voting Behavior
  - D73: Bureaucracy; Administrative Processes in Public Organizations; Corruption
  - D74: Conflict; Conflict Resolution; Alliances
  - D78: Positive Analysis of Policy-Making and Implementation
  - D79: Other
- D8: Information, Knowledge, and Uncertainty
  - D80: General
  - D81: Criteria for Decision-Making under Risk and Uncertainty
  - D82: Asymmetric and Private Information
  - D83: Search; Learning; Information and Knowledge; Communication; Belief
  - D84: Expectations; Speculations
  - D85: Network Formation and Analysis: Theory
  - D86: Economics of Contract: Theory
  - D87: Neuroeconomics
  - D89: Other
- D9: Intertemporal Choice and Growth
  - D90: General
  - D91: Intertemporal Consumer Choice; Life Cycle Models and Saving
  - D92: Intertemporal Firm Choice and Growth, Investment, or Financing
  - D99: Other
E: Macroeconomics and Monetary Economics
- E0: General
  - E00: General
  - E01: Measurement and Data on National Income and Product Accounts and Wealth
- E1: General Aggregative Models
  - E10: General
  - E11: Marxian; Sraffian; Institutional; Evolutionary
  - E12: Keynes; Keynesian; Post-Keynesian
  - E13: Neoclassical
  - E17: Forecasting and Simulation
  - E19: Other
- E2: Macroeconomics: Consumption, Saving, Production, Employment, and Investment
  - E20: General
  - E21: Consumption; Saving; Wealth
  - E22: Capital; Investment; Capacity
  - E23: Production
  - E24: Employment; Unemployment; Wages; Intergenerational Income Distribution
  - E25: Aggregate Factor Income Distribution
  - E26: Informal Economy; Underground Economy
  - E27: Forecasting and Simulation
  - E29: Other
- E3: Prices, Business Fluctuations, and Cycles
  - E30: General
  - E31: Price Level; Inflation; Deflation
  - E32: Business Fluctuations; Cycles
  - E37: Forecasting and Simulation
  - E39: Other
- E4: Money and Interest Rates
  - E40: General
  - E41: Demand for Money
  - E42: Monetary Systems; Standards; Regimes; Government and the Monetary System
  - E43: Determination of Interest Rates; Term Structure of Interest Rates
  - E44: Financial Markets and the Macroeconomy
  - E47: Forecasting and Simulation
  - E49: Other
- E5: Monetary Policy, Central Banking, and the Supply of Money and Credit
  - E50: General
  - E51: Money Supply; Credit; Money Multipliers
  - E52: Monetary Policy
  - E58: Central Banks and Their Policies
  - E59: Other
- E6: Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook
  - E60: General
  - E61: Policy Objectives; Policy Designs and Consistency; Policy Coordination
  - E62: Fiscal Policy
  - E63: Comparative or Joint Analysis of Fiscal and Monetary Policy; Stabilization
  - E64: Incomes Policy; Price Policy
  - E65: Studies of Particular Policy Episodes
  - E66: General Outlook and Conditions
  - E69: Other
F: International Economics
- F0: General
  - F00: General
  - F01: Global Outlook
  - F02: International Economic Order
- F1: Trade
  - F10: General
  - F11: Neoclassical Models of Trade
  - F12: Models of Trade with Imperfect Competition and Scale Economies
  - F13: Trade Policy; International Trade Organizations
  - F14: Country and Industry Studies of Trade
  - F15: Economic Integration
  - F16: Trade and Labor Market Interactions
  - F17: Trade Forecasting and Simulation
  - F18: Trade and Environment
  - F19: Other
- F2: International Factor Movements and International Business
  - F20: General
  - F21: International Investment; Long-Term Capital Movements
  - F22: International Migration
  - F23: Multinational Firms; International Business
  - F24: Remittances
  - F29: Other
- F3: International Finance
  - F30: General
  - F31: Foreign Exchange
  - F32: Current Account Adjustment; Short-Term Capital Movements
  - F33: International Monetary Arrangements and Institutions
  - F34: International Lending and Debt Problems
  - F35: Foreign Aid
  - F36: Financial Aspects of Economic Integration
  - F37: International Finance Forecasting and Simulation
  - F39: Other
- F4: Macroeconomic Aspects of International Trade and Finance
  - F40: General
  - F41: Open Economy Macroeconomics
  - F42: International Policy Coordination and Transmission
  - F43: Economic Growth of Open Economies
  - F47: Forecasting and Simulation
  - F49: Other
- F5: International Relations and International Political Economy
  - F50: General
  - F51: International Conflicts; Negotiations; Sanctions
  - F52: National Security; Economic Nationalism
  - F53: International Agreements and Observance; International Organizations
  - F54: Colonialism; Imperialism; Postcolonialism
  - F55: International Institutional Arrangements
  - F59: International Relations and International Political Economy: Other
G: Financial Economics
- G0: General
  - G00: General
- G1: General Financial Markets
  - G10: General
  - G11: Portfolio Choice; Investment Decisions
  - G12: Asset Pricing; Trading volume; Bond Interest Rates
  - G13: Contingent Pricing; Futures Pricing
  - G14: Information and Market Efficiency; Event Studies
  - G15: International Financial Markets
  - G18: Government Policy and Regulation
  - G19: Other
- G2: Financial Institutions and Services
  - G20: General
  - G21: Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages
  - G22: Insurance; Insurance Companies
  - G23: Pension Funds; Other Private Financial Institutions
  - G24: Investment Banking; Venture Capital; Brokerage; Rating Agencies
  - G28: Government Policy and Regulation
  - G29: Other
- G3: Corporate Finance and Governance
  - G30: General
  - G31: Capital Budgeting; Fixed Investment and Inventory Studies
  - G32: Financing Policy; Financial Risk and Risk Management; Capital and Ownership Structure
  - G33: Bankruptcy; Liquidation
  - G34: Mergers; Acquisitions; Restructuring; Corporate Governance
  - G35: Payout Policy
  - G38: Government Policy and Regulation
  - G39: Other
H: Public Economics
- H0: General
  - H00: General
- H1: Structure and Scope of Government
  - H10: General
  - H11: Structure, Scope, and Performance of Government
  - H19: Other
- H2: Taxation, Subsidies, and Revenue
  - H20: General
  - H21: Efficiency; Optimal Taxation
  - H22: Incidence
  - H23: Externalities; Redistributive Effects; Environmental Taxes and Subsidies
  - H24: Personal Income and Other Nonbusiness Taxes and Subsidies
  - H25: Business Taxes and Subsidies
  - H26: Tax Evasion
  - H27: Other Sources of Revenue
  - H29: Other
- H3: Fiscal Policies and Behavior of Economic Agents
  - H30: General
  - H31: Household
  - H32: Firm
  - H39: Other
- H4: Publicly Provided Goods
  - H40: General
  - H41: Public Goods
  - H42: Publicly Provided Private Goods
  - H43: Project Evaluation; Social Discount Rate
  - H44: Publicly Provided Goods: Mixed Markets
  - H49: Other
- H5: National Government Expenditures and Related Policies
  - H50: General
  - H51: Government Expenditures and Health
  - H52: Government Expenditures and Education
  - H53: Government Expenditures and Welfare Programs
  - H54: Infrastructures; Other Public Investment and Capital Stock
  - H55: Social Security and Public Pensions
  - H56: National Security and War
  - H57: Procurement
  - H59: Other
- H6: National Budget, Deficit, and Debt
  - H60: General
  - H61: Budget; Budget Systems
  - H62: Deficit; Surplus
  - H63: Debt; Debt Management
  - H68: Forecasts of Budgets, Deficits, and Debt
  - H69: Other
- H7: State and Local Government; Intergovernmental Relations
  - H70: General
  - H71: State and Local Taxation, Subsidies, and Revenue
  - H72: State and Local Budget and Expenditures
  - H73: Interjurisdictional Differentials and Their Effects
  - H74: State and Local Borrowing
  - H75: State and Local Government: Health, Education, and Welfare
  - H76: State and Local Government: Other Expenditure Categories
  - H77: Intergovernmental Relations; Federalism; Secession
  - H79: Other
- H8: Miscellaneous Issues
  - H80: General
  - H81: Governmental Loans, Loan Guarantees, Credits, and Grants
  - H82: Governmental Property
  - H83: Public Administration
  - H87: International Fiscal Issues; International Public Goods
  - H89: Other
I: Health, Education, and Welfare
- I0: General
  - I00: General
- I1: Health
  - I10: General
  - I11: Analysis of Health Care Markets
  - I12: Health Production
  - I18: Government Policy; Regulation; Public Health
  - I19: Other
- I2: Education
  - I20: General
  - I21: Analysis of Education
  - I22: Educational Finance
  - I23: Higher Education Research Institutions
  - I28: Government Policy
  - I29: Other
- I3: Welfare and Poverty
  - I30: General
  - I31: General Welfare
  - I32: Measurement and Analysis of Poverty
  - I38: Government Policy; Provision and Effects of Welfare Programs
  - I39: Other
J: Labor and Demographic Economics
- J0: General
  - J00: General
  - J01: Labor Economics: General
  - J08: Labor Economics Policies
- J1: Demographic Economics
  - J10: General
  - J11: Demographic Trends and Forecasts
  - J12: Marriage; Marital Dissolution; Family Structure; Domestic Abuse
  - J13: Fertility; Family Planning; Child Care; Children; Youth
  - J14: Economics of the Elderly; Economics of the Handicapped
  - J15: Economics of Minorities and Races; Non-labor Discrimination
  - J16: Economics of Gender; Non-labor Discrimination
  - J17: Value of Life; Forgone Income
  - J18: Public Policy
  - J19: Other
- J2: Demand and Supply of Labor
  - J20: General
  - J21: Labor Force and Employment, Size, and Structure
  - J22: Time Allocation and Labor Supply
  - J23: Labor Demand
  - J24: Human Capital; Skills; Occupational Choice; Labor Productivity
  - J26: Retirement; Retirement Policies
  - J28: Safety; Job Satisfaction; Related Public Policy
  - J29: Other
- J3: Wages, Compensation, and Labor Costs
  - J30: General
  - J31: Wage Level and Structure; Wage Differentials
  - J32: Nonwage Labor Costs and Benefits; Private Pensions
  - J33: Compensation Packages; Payment Methods
  - J38: Public Policy
  - J39: Other
- J4: Particular Labor Markets
  - J40: General
  - J41: Labor Contracts
  - J42: Monopsony; Segmented Labor Markets
  - J43: Agricultural Labor Markets
  - J44: Professional Labor Markets; Occupations; Licensing
  - J45: Public Sector Labor Markets
  - J48: Public Policy
  - J49: Other
- J5: Labor-Management Relations, Trade Unions, and Collective Bargaining
  - J50: General
  - J51: Trade Unions: Objectives, Structure, and Effects
  - J52: Dispute Resolution: Strikes, Arbitration, and Mediation; Collective Bargaining
  - J53: Labor-Management Relations; Industrial Jurisprudence
  - J54: Producer Cooperatives; Labor Managed Firms
  - J58: Public Policy
  - J59: Other
- J6: Mobility, Unemployment, and Vacancies
  - J60: General
  - J61: Geographic Labor Mobility; Immigrant Workers
  - J62: Job, Occupational, and Intergenerational Mobility
  - J63: Turnover; Vacancies; Layoffs
  - J64: Unemployment: Models, Duration, Incidence, and Job Search
  - J65: Unemployment Insurance; Severance Pay; Plant Closings
  - J68: Public Policy
  - J69: Other
- J7: Labor Discrimination
  - J70: General
  - J71: Discrimination
  - J78: Public Policy
  - J79: Other
- J8: Labor Standards: National and International
  - J80: General
  - J81: Working Conditions
  - J82: Labor Force Composition
  - J83: Workers' Rights
  - J88: Public Policy
  - J89: Other
K: Law and Economics
- K0: General
  - K00: General
- K1: Basic Areas of Law
  - K10: General
  - K11: Property Law
  - K12: Contract Law
  - K13: Tort Law and Product Liability
  - K14: Criminal Law
  - K19: Other
- K2: Regulation and Business Law
  - K20: General
  - K21: Antitrust Law
  - K22: Corporation and Securities Law
  - K23: Regulated Industries and Administrative Law
  - K29: Other
- K3: Other Substantive Areas of Law
  - K30: General
  - K31: Labor Law
  - K32: Environmental, Health, and Safety Law
  - K33: International Law
  - K34: Tax Law
  - K35: Personal Bankruptcy Law
  - K36: Family and Personal Law
  - K39: Other
- K4: Legal Procedure, the Legal System, and Illegal Behavior
  - K40: General
  - K41: Litigation Process
  - K42: Illegal Behavior and the Enforcement of Law
  - K49: Other
L: Industrial Organization
- L0: General
  - L00: General
- L1: Market Structure, Firm Strategy, and Market Performance
  - L10: General
  - L11: Production, Pricing, and Market Structure; Size Distribution of Firms
  - L12: Monopoly; Monopolization Strategies
  - L13: Oligopoly and Other Imperfect Markets
  - L14: Transactional Relationships; Contracts and Reputation; Networks
  - L15: Information and Product Quality; Standardization and Compatibility
  - L16: Industrial Organization and Macroeconomics; Macroeconomic Industrial Structure; Industrial Price Indices
  - L17: Open Source Products and Markets
  - L19: Other
- L2: Firm Objectives, Organization, and Behavior
  - L20: General
  - L21: Business Objectives of the Firm
  - L22: Firm Organization and Market Structure
  - L23: Organization of Production
  - L24: Contracting Out; Joint Ventures; Technology Licensing
  - L25: Firm Performance: Size, Diversification, and Scope
  - L26: Entrepreneurship
  - L29: Other
- L3: Nonprofit Organizations and Public Enterprise
  - L30: General
  - L31: Nonprofit Institutions; NGOs
  - L32: Public Enterprises
  - L33: Comparison of Public and Private Enterprises; Privatization; Contracting Out
  - L38: Public Policy
  - L39: Other
- L4: Antitrust Issues and Policies
  - L40: General
  - L41: Monopolization; Horizontal Anticompetitive Practices
  - L42: Vertical Restraints; Resale Price Maintenance; Quantity Discounts
  - L43: Legal Monopolies and Regulation or Deregulation
  - L44: Antitrust Policy and Public Enterprises, Nonprofit Institutions, and Professional Organizations
  - L49: Other
- L5: Regulation and Industrial Policy
  - L50: General
  - L51: Economics of Regulation
  - L52: Industrial Policy; Sectoral Planning Methods
  - L53: Enterprise Policy
  - L59: Other
- L6: Industry Studies: Manufacturing
  - L60: General
  - L61: Metals and Metal Products; Cement; Glass; Ceramics
  - L62: Automobiles; Other Transportation Equipment
  - L63: Microelectronics; Computers; Communications Equipment
  - L64: Other Machinery; Business Equipment; Armaments
  - L65: Chemicals; Rubber; Drugs; Biotechnology
  - L66: Food; Beverages; Cosmetics; Tobacco; Wine and Spirits
  - L67: Other Consumer Nondurables: Clothing, Textiles, Shoes, and Leather
  - L68: Appliances; Other Consumer Durables
  - L69: Other
- L7: Industry Studies: Primary Products and Construction
  - L70: General
  - L71: Mining, Extraction, and Refining: Hydrocarbon Fuels
  - L72: Mining, Extraction, and Refining: Other Nonrenewable Resources
  - L73: Forest Products
  - L74: Construction
  - L78: Government Policy
  - L79: Other
- L8: Industry Studies: Services
  - L80: General
  - L81: Retail and Wholesale Trade; e-Commerce
  - L82: Entertainment; Media
  - L83: Sports; Gambling; Recreation; Tourism
  - L84: Personal, Professional, and Business Services
  - L85: Real Estate Services
  - L86: Information and Internet Services; Computer Software
  - L87: Postal and Delivery Services
  - L88: Government Policy
  - L89: Other
- L9: Industry Studies: Transportation and Utilities
  - L90: General
  - L91: Transportation: General
  - L92: Railroads and Other Surface Transportation
  - L93: Air Transportation
  - L94: Electric Utilities
  - L95: Gas Utilities; Pipelines; Water Utilities
  - L96: Telecommunications
  - L97: Utilities: General
  - L98: Government Policy
  - L99: Other
M: Business Administration and Business Economics; Marketing; Accounting
- M0: General
  - M00: General
- M1: Business Administration
  - M10: General
  - M11: Production Management
  - M12: Personnel Management
  - M13: New Firms; Startups
  - M14: Corporate Culture; Social Responsibility
  - M15: IT Management
  - M16: International Business Administration
  - M19: Other
- M2: Business Economics
  - M20: General
  - M21: Business Economics
  - M29: Other
- M3: Marketing and Advertising
  - M30: General
  - M31: Marketing
  - M37: Advertising
  - M38: Government Policy and Regulation
  - M39: Other
- M4: Accounting and Auditing
  - M40: General
  - M41: Accounting
  - M42: Auditing
  - M48: Government Policy and Regulation
  - M49: Other
- M5: Personnel Economics
  - M50: General
  - M51: Firm Employment Decisions; Promotions
  - M52: Compensation and Compensation Methods and Their Effects
  - M53: Training
  - M54: Labor Management
  - M55: Labor Contracting Devices
  - M59: Other
N: Economic History
- N0: General
  - N00: General
  - N01: Development of the Discipline: Historiographical; Sources and Methods
- N1: Macroeconomics and Monetary Economics; Growth and Fluctuations
  - N10: General, International, or Comparative
  - N11: U.S.; Canada: Pre-1913
  - N12: U.S.; Canada: 1913-
  - N13: Europe: Pre-1913
  - N14: Europe: 1913-
  - N15: Asia including Middle East
  - N16: Latin America; Caribbean
  - N17: Africa; Oceania
- N2: Financial Markets and Institutions
  - N20: General, International, or Comparative
  - N21: U.S.; Canada: Pre-1913
  - N22: U.S.; Canada: 1913-
  - N23: Europe: Pre-1913
  - N24: Europe: 1913-
  - N25: Asia including Middle East
  - N26: Latin America; Caribbean
  - N27: Africa; Oceania
- N3: Labor and Consumers, Demography, Education, Health, Welfare, Income, and Wealth
  - N30: General, International, or Comparative
  - N31: U.S.; Canada: Pre-1913
  - N32: U.S.; Canada: 1913-
  - N33: Europe: Pre-1913
  - N34: Europe: 1913-
  - N35: Asia including Middle East
  - N36: Latin America; Caribbean
  - N37: Africa; Oceania
- N4: Government, War, Law, and Regulation
  - N40: General, International, or Comparative
  - N41: U.S.; Canada: Pre-1913
  - N42: U.S.; Canada: 1913-
  - N43: Europe: Pre-1913
  - N44: Europe: 1913-
  - N45: Asia including Middle East
  - N46: Latin America; Caribbean
  - N47: Africa; Oceania
- N5: Agriculture, Natural Resources, Environment, and Extractive Industries
  - N50: General, International, or Comparative
  - N51: U.S.; Canada: Pre-1913
  - N52: U.S.; Canada: 1913-
  - N53: Europe: Pre-1913
  - N54: Europe: 1913-
  - N55: Asia including Middle East
  - N56: Latin America; Caribbean
  - N57: Africa; Oceania
- N6: Manufacturing and Construction
  - N60: General, International, or Comparative
  - N61: U.S.; Canada: Pre-1913
  - N62: U.S.; Canada: 1913-
  - N63: Europe: Pre-1913
  - N64: Europe: 1913-
  - N65: Asia including Middle East
  - N66: Latin America; Caribbean
  - N67: Africa; Oceania
- N7: Transport, Trade, Energy, Technology, and Other Services
  - N70: General, International, or Comparative
  - N71: U.S.; Canada: Pre-1913
  - N72: U.S.; Canada: 1913-
  - N73: Europe: Pre-1913
  - N74: Europe: 1913-
  - N75: Asia including Middle East
  - N76: Latin America; Caribbean
  - N77: Africa; Oceania
- N8: Micro-Business History
  - N80: General, International, or Comparative
  - N81: U.S.; Canada: Pre-1913
  - N82: U.S.; Canada: 1913-
  - N83: Europe: Pre-1913
  - N84: Europe: 1913-
  - N85: Asia including Middle East
  - N86: Latin America; Caribbean
  - N87: Africa; Oceania
- N9: Regional and Urban History
  - N90: General, International, or Comparative
  - N91: U.S.; Canada: Pre-1913
  - N92: U.S.; Canada: 1913-
  - N93: Europe: Pre-1913
  - N94: Europe: 1913-
  - N95: Asia including Middle East
  - N96: Latin America; Caribbean