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Unit 1: Basic Economic Concepts

1. Production Possibilities Curve (PPC)

• Definition: A curve showing the maximum combinations of goods/services that can be produced with fixed resources and technology.

• Key Features:

• Points on the curve = Efficient use of resources.

• Points inside the curve = Inefficient (underutilized resources).

• Points outside the curve = Unattainable with current resources.

• Opportunity Cost: Moving along the curve requires giving up some of one good to produce more of another.

Shifts in the PPC:

1. Economic Growth: Outward shift due to more resources, better technology, or capital investments.

2. Resource Loss: Inward shift due to natural disasters, war, or resource depletion.

Example: If a country produces guns and butter, increasing butter production requires sacrificing gun production (opportunity cost).

2. Comparative and Absolute Advantage

• Absolute Advantage: The ability to produce more of a good using the same resources.

• Comparative Advantage: The ability to produce a good at a lower opportunity cost.

• Specialization and Trade: Countries should specialize in goods where they have a comparative advantage to maximize total output.

Example:

• Country A: Produces 10 cars or 20 computers.

• Country B: Produces 5 cars or 15 computers.

• Country A has an absolute advantage in both goods.

• Country B has a comparative advantage in computers because it gives up fewer cars per computer.

3. Shifters of Demand

1. Tastes/Preferences: Positive trends increase demand.

2. Income:

• Normal goods: Demand increases as income rises.

• Inferior goods: Demand decreases as income rises.

3. Prices of Related Goods:

• Substitutes: Price increase in one increases demand for the other.

• Complements: Price increase in one decreases demand for the other.

4. Expectations: Future price increases may increase current demand.

5. Number of Buyers: More buyers increase demand.

Demand Curve: Downward sloping (inverse relationship between price and quantity demanded).

Unit 2: Measuring Economic Performance

1. GDP (Gross Domestic Product)

• Definition: Total market value of all final goods/services produced in a country within a specific time period.

• Approaches:

• Expenditure Approach:

GDP = C + I + G + (X - M)

C : Consumption, I : Investment, G : Government spending, (X - M) : Net exports.

• Income Approach: Sum of all incomes (wages, rents, profits) in the economy.

2. Types of Unemployment

1. Frictional: Temporary unemployment as workers change jobs or enter the labor force.

2. Structural: Mismatch between workers’ skills and job requirements (e.g., automation).

3. Cyclical: Caused by economic downturns (recession).

4. Natural Rate of Unemployment (NRU): Frictional + Structural (no cyclical unemployment).

Example:

• A robot replaces a factory worker = Structural unemployment.

• A college graduate job-hunting = Frictional unemployment.

3. Inflation

• Types of Inflation:

• Demand-Pull Inflation: Excess demand raises prices.

• Cost-Push Inflation: Rising production costs (e.g., wages, raw materials) increase prices.

• Calculating Inflation Rate:

\text{Inflation Rate} = \frac{\text{CPI (New) - CPI (Old)}}{\text{CPI (Old)}} \times 100

Example:

• CPI last year: 120.

• CPI this year: 126.

\text{Inflation Rate} = \frac{126 - 120}{120} \times 100 = 5\%

Unit 3: Fiscal Policy

1. Expansionary vs. Contractionary Fiscal Policy

• Expansionary:

• Goal: Boost aggregate demand (AD) during a recession.

• Tools: Increase government spending or lower taxes.

• Effect: Larger budget deficits.

• Contractionary:

• Goal: Reduce AD to control inflation.

• Tools: Decrease government spending or raise taxes.

• Effect: Smaller deficits or surpluses.

2. Spending Multiplier

• Measures the impact of a change in government spending on total GDP.

\text{Spending Multiplier} = \frac{1}{1 - MPC}

MPC : Marginal Propensity to Consume.

Example:

• If MPC = 0.8 , Multiplier = \frac{1}{1 - 0.8} = 5 .

• A $10 billion