Macroeconomic Indicators

Three Numbers That Move Governments

Governments rise and fall on three vital statistics. GDP, gross domestic product, is the market value of all final goods and services produced within a country in a period. By the expenditure approach:

$$GDP = C + I + G + NX$$

Where $C$ is consumption, $I$ is investment, $G$ is government purchases, and $NX$ is net exports. Only final goods count: flour sold to a bakery is excluded to avoid double-counting.

Nominal GDP uses current prices, while real GDP strips out price changes to reveal actual output growth.

Unemployment rate is the share of the labor force (working plus actively seeking work) without a job:

$$u = \frac{\text{unemployed}}{\text{labor force}} \times 100$$

Pitfall: Students, retirees, and discouraged workers who stop searching are excluded from the labor force. Unemployment can fall when people simply give up looking.

Inflation and GDP Blind Spots

Inflation rate is the percentage change in the general price level, tracked via the consumer price index (CPI): the cost of a fixed basket of goods over time. Inflation erodes purchasing power and seeps into wages and contracts.

What GDP misses: GDP measures production, not welfare—treat it like a speedometer, not a happiness gauge. It misses unpaid housework, the underground economy, leisure, environmental damage, and wealth distribution.

Common pitfall: Never assume "unemployment fell, so the economy improved" without checking if job seekers simply gave up.