Fiche de révision : Fundamentals of Economics and International Finance

📋 Course Outline

1. Basic Economic Concepts
2. Historical Economic Schools
3. Microeconomic Foundations
4. Macroeconomic Aggregates
5. Balance of Payments
6. International Trade Theories
7. Money and Banking
8. Monetary Policy Tools

📖 1. Basic Economic Concepts

🔑 Key Concepts & Definitions

• Needs: The states of dissatisfaction experienced by individuals or groups, motivating the pursuit of goods and services. Needs can be physiological (food, shelter) or variable based on preferences, time, and location.

• Goods: Items capable of satisfying needs. They are classified as economic goods when they are scarce and require production, unlike free goods like air which are abundant and not scarce.

• Scarcity: The fundamental economic problem arising from limited resources relative to unlimited human wants, necessitating choices and prioritization.

• Resources (Factors of Production): Inputs used to produce goods and services, including land, labor, capital, and entrepreneurship. Resources are limited, leading to the need for efficient allocation.

• Opportunity Cost: The value of the next best alternative foregone when making a decision. It measures the cost of choosing one option over another.

• Economic Efficiency: The optimal use of resources to maximize output and satisfaction, avoiding waste and ensuring the best possible allocation of scarce resources.

📝 Essential Points

• The core of economics is managing scarcity by making choices that optimize resource use.
• Needs are unlimited, but resources are finite, creating the necessity for trade-offs.
• Goods are classified based on their nature (material vs. immaterial), durability, divisibility, and ownership (private vs. public).
• The concept of opportunity cost is central to understanding decision-making at individual, business, and government levels.
• Efficient resource utilization involves balancing production and consumption to meet needs without waste.

💡 Key Takeaway

Economics studies how individuals and societies allocate scarce resources to satisfy unlimited needs, emphasizing the importance of choices, opportunity costs, and efficiency in resource management.

📖 2. Historical Economic Schools

🔑 Key Concepts & Definitions

• Mercantilism: An economic doctrine from 1450–1750 emphasizing the accumulation of gold and silver through trade surplus, advocating state intervention, protectionism, and colonial expansion to increase national wealth.

• Physiocracy: An 18th-century school led by François Quesnay, asserting that land is the primary source of wealth, promoting free trade, minimal government interference, and the importance of agriculture in economic growth.

• Classical Economics: A school originating with Adam Smith (1776), emphasizing free markets, division of labor, and the "invisible hand" guiding resources toward equilibrium; advocates limited government role.

• Neoclassical Economics: Developed in the late 19th century, focusing on marginal utility, supply and demand, and individual optimization; considers value as determined by utility and prices.

• Marxism: A critique of capitalism by Karl Marx, highlighting class struggle, exploitation, surplus value, and the tendency toward economic crises; predicts the eventual overthrow of capitalist systems.

• Keynesian Economics: Founded by John Maynard Keynes during the 1930s, emphasizing total demand in the economy, advocating active government intervention to manage economic cycles and ensure full employment.

📝 Essential Points

• Early schools like mercantilism favored protectionism and state control, contrasting with physiocrats' emphasis on agriculture and natural laws.
• Classical economics introduced the concept of free markets and the "invisible hand," laying the foundation for modern capitalism.
• Neoclassical theory refined these ideas by focusing on individual choice, marginal analysis, and utility maximization.
• Marxist theory critiques capitalism's inherent inequalities, emphasizing class conflict and the role of labor exploitation.
• Keynesian economics emerged as a response to the Great Depression, advocating fiscal and monetary policies to stabilize output and employment.
• These schools reflect evolving views on the role of government, markets, and resources in economic development.

💡 Key Takeaway

The evolution of economic thought from mercantilism to Keynesianism illustrates shifting perspectives on market efficiency, government intervention, and the sources of wealth, shaping modern economic policies and debates.

📖 3. Microeconomic Foundations

🔑 Key Concepts & Definitions

• Agent Economic (Economic Agent): An individual, firm, or institution that makes decisions regarding production, consumption, or investment, possessing autonomous decision-making capacity and accounting records.

• Microeconomics: The branch of economics that studies individual agents' behaviors, such as households and firms, and their decision-making processes.

• Macroeconomics: The branch focusing on the economy as a whole, analyzing aggregate variables like GDP, inflation, and unemployment, based on the collective decisions of micro agents.

• Aggregate (Agrégat): A large-scale measure that summarizes economic activity by combining individual decisions, such as total consumption, total savings, or total production.

• Value Added: The net output of an agent or sector, calculated as the difference between production and intermediate consumption, representing the contribution to GDP.

• Production Account: A record of an agent's output, calculated as Value Added plus intermediate consumption, used to determine contribution to overall economic activity.

📝 Essential Points

• Microeconomic foundations analyze individual decision-making, which collectively shapes macroeconomic outcomes.
• The macroeconomic variables (like GDP, employment) are derived from the aggregation of micro-level decisions.
• Agents are classified into categories based on their primary functions: households, firms, public institutions, financial entities, etc.
• The value added by each agent is central to measuring their contribution to the economy, calculated via the production account.
• Understanding the flow from micro decisions to macro aggregates is essential for policy formulation and economic analysis.

💡 Key Takeaway

Microeconomic foundations underpin macroeconomic analysis by explaining how individual decisions and behaviors aggregate to form the overall economic activity and outcomes.

📖 4. Macroeconomic Aggregates

🔑 Key Concepts & Definitions

• Gross Domestic Product (GDP): The total market value of all final goods and services produced within a country during a specific period.
  In terms of production, income, or expenditure.

• GDP at Market Prices (PIBpm): The value of GDP including taxes on products (TVA, customs duties) minus subsidies.
  Calculated as VAB + TVA + DD - PISB.

• GDP at Factor Cost (PIBcf): The value of GDP excluding taxes on products and including subsidies.
  PIBcf = PIBpm - Impôts indirects + Subventions d’exploitation.

• Net National Product (PNB): The total value of goods and services produced by a country's residents, including income from abroad, minus depreciation.
  PNB = GDP + net income from abroad (solde des revenus de facteurs).

• National Income (RNB): The total income earned by a country's residents from production, including income from abroad, minus depreciation.
  RNB = PNB - Amortissement (depreciation).

• Aggregate Expenditure (Dépenses globales): The total spending on final goods and services in an economy, including consumption, investment, government spending, and net exports.
  D = C + I + G + (X - M).

📝 Essential Points

• Multiple calculation methods: GDP can be calculated via production (value added), income (wages, profits), or expenditure (consumption, investment, net exports).
• Production approach: GDP = VAB + TVA + DD - PISB.
• Income approach: GDP = Sum of wages, profits, taxes minus subsidies.
• Demand approach: GDP = Consumption + Investment + Government Spending + Net Exports.
• GDP adjustments: GDP at market prices includes taxes/subsidies; GDP at factor cost excludes them.
• Relation between aggregates: PNB = GDP + net income from abroad; RNB = PNB - depreciation.
• Application: Numerical examples demonstrate calculation of GDP, PNB, and related aggregates based on given data.

💡 Key Takeaway

Macroeconomic aggregates like GDP, PNB, and RNB provide comprehensive measures of a country's economic activity, calculated through different approaches, each highlighting production, income, or expenditure perspectives.

📖 5. Balance of Payments

🔑 Key Concepts & Definitions

Balance of Payments (BoP):
A comprehensive record of all economic transactions between residents of a country and the rest of the world over a specific period, including trade, investment, and financial transfers.

Current Account:
A component of BoP that records transactions related to goods, services, income (such as wages and investments), and current transfers (like remittances). It reflects a country's net income from abroad.

Capital and Financial Account:
Part of BoP that records capital transfers, foreign direct investment, portfolio investment, and other financial flows. It shows how a country finances its current account deficit or surplus.

Trade Balance:
The difference between the value of a country's exports and imports of goods and services. A positive trade balance indicates a surplus; a negative indicates a deficit.

Official Reserves Account:
A component of BoP that records changes in a country's official reserve assets, such as foreign currency reserves and gold, used to stabilize the currency.

Balance of Payments Equilibrium:
A situation where the sum of all credits (inflows) equals the sum of all debits (outflows), indicating no overall imbalance in international transactions.

📝 Essential Points

• The BoP must always balance; a surplus in one account is offset by a deficit in another.
• Persistent current account deficits may be financed by capital inflows, leading to changes in reserves or increased foreign debt.
• Exchange rate policies and economic policies influence BoP components.
• A BoP surplus can lead to an accumulation of foreign reserves; a deficit may deplete reserves.
• BoP data is crucial for assessing a country's economic stability and competitiveness.

💡 Key Takeaway

The Balance of Payments provides a vital snapshot of a country's economic interactions with the world, reflecting its financial health, competitiveness, and the sustainability of its economic policies.

📖 6. International Trade Theories

🔑 Key Concepts & Definitions

• Absolute Advantage
  The ability of a country to produce a good more efficiently than another country, using fewer resources.
  Example: Country A can produce 10 units of cloth per hour, while Country B can produce 6 units; A has an absolute advantage in cloth production.

• Comparative Advantage
  The ability of a country to produce a good at a lower opportunity cost than another country, leading to benefits from trade.
  Example: Even if one country is less efficient overall, it can still benefit by specializing in goods where it has the lowest opportunity cost.

• Heckscher-Ohlin Theorem
  A theory stating that countries will export goods that intensively use their abundant factors of production and import goods that use their scarce factors.
  Example: A country rich in capital will export capital-intensive goods.

• Factor Endowments
  The resources (land, labor, capital, entrepreneurship) a country possesses, which influence its comparative advantage.
  Example: A country with large arable land has an advantage in agricultural exports.

• Trade Balance
  The difference between the value of a country's exports and imports over a period.
  Example: A trade surplus occurs when exports exceed imports; a deficit is the opposite.

• Protectionism
  Economic policies aimed at restricting imports to protect domestic industries, such as tariffs, quotas, or subsidies.
  Example: Imposing a tariff on imported steel to support local steel producers.

📝 Essential Points

• Trade Theories Evolution: From absolute advantage (Adam Smith) to comparative advantage (David Ricardo), and further to factor endowment-based models (Heckscher-Ohlin).
• Benefits of Trade: Specialization according to comparative advantage increases overall efficiency and welfare.
• Trade Policies: Governments may adopt protectionist measures to shield domestic industries, but these can lead to trade wars and inefficiencies.
• Limitations: Real-world factors like transportation costs, tariffs, and non-economic considerations can affect the applicability of these theories.
• Balance of Payments: Reflects a country's economic transactions with the rest of the world, influencing exchange rates and economic stability.

💡 Key Takeaway

International trade theories highlight how countries can benefit from specializing based on their resources and efficiencies, but real-world policies and factors can influence the actual gains from trade.

📖 7. Money and Banking

🔑 Key Concepts & Definitions

• Money: A generally accepted medium of exchange within a community, serving as an intermediary in transactions, a unit of account, and a store of value (Raymond Barre).
• Functions of Money:
  • Medium of Exchange: Facilitates buying and selling of goods and services.
  • Unit of Account: Provides a standard measure for valuing goods and services.
  • Store of Value: Preserves purchasing power over time.
• Monetary Forms:
  • Physical Money (Cash): Banknotes and coins, also called fiduciary money.
  • Scriptural Money: Bank deposits accessible via checks, cards, and electronic transfers.
• Masse Monétaire (Money Supply):
  • Narrow Money (MSR): Cash + demand deposits (immediate payment assets).
  • Broad Money (MM): Narrow money + quasi-money (near money assets like savings deposits).
• Creation of Money: Process mainly driven by commercial banks through lending, backed by reserves, foreign assets, government claims, and credits to the economy.

📝 Essential Points

• Money simplifies trade compared to barter, reducing transaction costs and time.
• The functions of money are fundamental for economic stability and efficiency.
• Physical money (cash) and bank deposits constitute the main forms of money, with the latter enabling electronic transactions.
• The massive monetary base is created through banking activities, especially loans, which expand the money supply.
• The money creation process involves banks issuing loans against reserves, foreign currency holdings, government credits, and other assets.
• The broad money (M3) includes near-money assets, which are less liquid but can be quickly converted into cash.
• Central banks regulate the money supply through monetary policy tools, influencing inflation, interest rates, and economic growth.

💡 Key Takeaway

Money functions as a vital facilitator of economic activity, with its creation primarily driven by banking systems through lending, and its regulation essential for maintaining financial stability.

📖 8. Monetary Policy Tools

🔑 Key Concepts & Definitions

• Monetary Policy: The process by which a country's central bank manages money supply, interest rates, and liquidity to achieve economic objectives such as controlling inflation, stabilizing currency, and promoting growth.

• Interest Rate Policy (Policy Rate): The central bank's adjustment of key interest rates (e.g., repo rate, discount rate) to influence borrowing, spending, and investment in the economy.

• Open Market Operations (OMO): The buying and selling of government securities in the open market by the central bank to regulate liquidity and influence short-term interest rates.

• Reserve Requirements: The minimum amount of reserves that commercial banks must hold, either as cash in their vaults or as deposits at the central bank, used to control credit creation and money supply.

• Quantitative Easing (QE): A non-conventional monetary policy where the central bank purchases longer-term securities to increase money supply and stimulate economic activity when traditional policy tools are exhausted.

• Lender of Last Resort: The role of the central bank to provide emergency liquidity to financial institutions facing short-term liquidity shortages to prevent bank failures and maintain financial stability.

📝 Essential Points

• Central banks primarily use interest rate adjustments, open market operations, and reserve requirements as tools to influence the money supply and economic activity.
• Lowering interest rates encourages borrowing and investment, stimulating economic growth; raising rates has the opposite effect.
• Open market operations are the most flexible and frequently used tool for short-term liquidity management.
• Reserve requirements are less frequently adjusted but serve as a macroprudential tool to control credit expansion.
• Quantitative easing is used during economic crises when traditional policy rates are near zero.
• The effectiveness of monetary policy depends on the transmission mechanism, including how changes in policy influence lending, spending, and inflation.

💡 Key Takeaway

Monetary policy tools are essential instruments used by central banks to regulate the economy by controlling liquidity, interest rates, and credit, thereby influencing inflation, growth, and financial stability.

📊 Synthesis Tables

⚠️ Common Pitfalls & Confusions

1. Confusing needs (unlimited) with goods (scarce items capable of satisfying needs).
2. Mistaking opportunity cost as only monetary, ignoring time or alternative uses.
3. Overlooking the difference between GDP at market prices and factor cost, especially taxes/subsidies.
4. Assuming value added is the same as total output; it’s net contribution after intermediate consumption.
5. Misinterpreting classical economics as advocating heavy government intervention—actually favors free markets.
6. Confusing aggregate expenditure with total income; they are related but distinct concepts.
7. Overgeneralizing the invisible hand as always leading to optimal outcomes without market failures.
8. Mistaking net national product for gross national product—the former subtracts depreciation.
9. Assuming money is only a medium of exchange—also a store of value and unit of account.
10. Overlooking the role of monetary policy tools in influencing inflation and output.

✅ Exam Checklist

• Define needs, goods, scarcity, resources, opportunity cost, and economic efficiency.
• Explain the main features of mercantilism, physiocracy, classical, neoclassical, Marxism, and Keynesian schools.
• Describe microeconomic agents and how micro decisions aggregate into macroeconomic variables.
• Calculate and differentiate between GDP at market prices and factor cost.
• Understand the components and calculation of net national product, national income, and aggregate expenditure.
• Identify the main macroeconomic aggregates: GDP, PNB, RNB, and their relationships.
• Recognize the role of money as a medium of exchange, store of value, and unit of account.
• List and explain the main tools of monetary policy: open market operations, reserve requirements, and discount rate.
• Describe the principles of international trade theories: absolute advantage, comparative advantage, and protectionism.
• Summarize the balance of payments components: current account, capital account, and financial account.
• Understand the main theories of international trade and their implications.
• Recall the functions of banks and the role of central banks in monetary policy.