Measures of economic performance

Welcome to Macroeconomics!

Welcome! In this chapter, we are going to learn how to measure the "health" of an entire country. Just like a doctor uses blood pressure and temperature to see if you are healthy, economists use specific measures of economic performance to see how well a country is doing.

Don't worry if some of these terms sound scary at first. We will break them down step-by-step with simple examples. By the end of these notes, you’ll be able to look at the news and actually understand what they mean when they talk about "GDP" or "Inflation"!

Quick Review: Before we start, remember that Macroeconomics looks at the "big picture"—the whole economy—rather than individual people or single shops.

1. Economic Growth

Economic growth is basically looking at whether a country is getting "richer" by producing more stuff over time.

Key Concepts to Know:

Gross Domestic Product (GDP): This is the total value of all goods and services produced within a country in a year. Think of it as the country's "total receipt" for everything it made.

Gross National Income (GNI): This is similar to GDP, but it also includes money earned by the country's people and businesses from abroad, minus any money sent out by foreigners living in the country.

Important Distinctions:

Often, the exam will try to trick you with these pairs. Let’s clear them up:

1. Real vs. Nominal:
- Nominal GDP is the value at current prices. It can look high just because prices went up (inflation).
- Real GDP is adjusted for inflation. It tells us if we are actually producing more items, not just selling them for higher prices.
Analogy: If you sold 10 apples for \( \$1 \) each last year (\( \$10 \)) and 10 apples for \( \$2 \) each this year (\( \$20 \)), your Nominal income doubled, but your Real income stayed the same because you still only have 10 apples!

2. Total vs. Per Capita:
- Total GDP is the whole country's output.
- GDP Per Capita is the GDP divided by the total population. This is a better measure of the average living standard. If GDP grows by \( 2\% \) but the population grows by \( 5\% \), the average person is actually getting poorer!

3. Value vs. Volume:
- Value is the monetary worth (\( \text{Price} \times \text{Quantity} \)).
- Volume is the physical quantity of goods produced.

Comparing Countries: PPPs

Purchasing Power Parity (PPP): This is a way of comparing GDP between countries while taking into account the "cost of living."
Example: \( \$5 \) might buy you a whole meal in one country but only a cup of coffee in another. PPP adjusts for this so we can compare how much people can actually buy.

Recession

A recession is officially defined as two consecutive quarters (6 months) of negative economic growth (where Real GDP is falling).

Limitations of GDP

Common Mistake to Avoid: Thinking that a high GDP always means a "happy" country. GDP ignores:
- The Hidden Economy: Unpaid work (like housework) or illegal trade.
- Income Inequality: A few people might be very rich while everyone else is poor.
- Quality of Life: It doesn't measure pollution, stress levels, or free time.

Did you know? Some countries, like Bhutan, measure Gross National Happiness instead of just GDP!

Key Takeaway: Real GDP per capita is the most common way to measure living standards, but it doesn't tell the whole story about happiness or equality.

2. Inflation

Inflation is all about the "purchasing power" of your money.

Definitions:

- Inflation: A sustained increase in the general price level (prices are going up).
- Deflation: A sustained decrease in the general price level (prices are going down).
- Disinflation: A fall in the rate of inflation. Prices are still rising, but rising slower than before. (Like a car slowing down from 60mph to 20mph—it's still moving forward, just slower).

How do we measure it? (CPI)

The Consumer Price Index (CPI) measures the average price change of a weighted basket of goods.

How it works (Step-by-Step):
1. The government conducts a survey to see what people spend money on.
2. They create a "basket" of the most popular items (e.g., bread, Netflix, petrol).
3. They weight the items. If people spend more on rent than on chocolate, rent gets a higher "weight" because its price change matters more to your wallet.
4. They track the price changes and calculate the index.

Causes of Inflation:

1. Demand-pull: When there is too much demand in the economy. "Too much money chasing too few goods."
2. Cost-push: When the costs for businesses go up (like higher wages or oil prices), so they raise their prices to keep making a profit.
3. Money Supply: If the government prints too much money, the value of that money falls, causing prices to rise.

Key Takeaway: Low and stable inflation (usually around \( 2\% \)) is good for the economy because it encourages people to spend now rather than later.

3. Employment and Unemployment

To be unemployed, you must be:
1. Without a job.
2. Actively seeking work.
3. Available to start work.

If you are a student or retired, you are not "unemployed"—you are economically inactive.

Types of Unemployment (The "Big 5"):

- Frictional: "In-between" jobs. (e.g., someone who just quit and is looking for a better one).
- Seasonal: Jobs that only exist at certain times. (e.g., a Santa Claus actor or a lifeguard in winter).
- Structural: A mismatch of skills. The industry has changed, and workers' skills are no longer needed (e.g., coal miners when mines close).
- Demand-Deficiency (Cyclical): Happens during a recession when people stop spending money, so firms don't need as many workers.
- Real Wage Inflexibility: When wages are kept too high (e.g., by powerful trade unions or high minimum wages), so firms can't afford to hire everyone.

Underemployment

This is when someone has a job, but it’s not enough. They might be working part-time when they want full-time, or they are a highly skilled engineer working as a waiter.

Key Takeaway: High unemployment is a waste of resources. It leads to lower tax revenue for the government and can cause social problems.

4. Balance of Payments (Current Account)

The Balance of Payments records all financial transactions between one country and the rest of the world. We focus mostly on the Current Account.

Components of the Current Account:

1. Trade in Goods (Visibles): Buying/selling physical stuff like cars or food.
2. Trade in Services (Invisibles): Buying/selling things you can't touch, like banking, tourism, or insurance.
3. Primary Income: Profits, interest, and dividends coming into or going out of the country.
4. Secondary Income: Transfers of money where nothing is given back (like foreign aid or money sent home by workers abroad).

Surplus vs. Deficit:

- Current Account Deficit: When the value of imports is greater than the value of exports. (Money is flowing out of the country).
- Current Account Surplus: When the value of exports is greater than the value of imports. (Money is flowing into the country).

Quick Review Box:
- Economic Growth: Measured by Real GDP.
- Inflation: Measured by CPI (the shopping basket).
- Unemployment: Must be looking and available for work.
- Current Account: Exports vs. Imports.

Don't worry if this seems like a lot of information! Macroeconomics is like a puzzle—once you understand these four main "pieces," the rest of the course will start to make a lot more sense. Keep practicing!