Aggregate supply and demand model
The core apparatus is the AS-AD model linking price levels to real output. Shifts in either curve explain inflation, recession, and the effect of policy shocks on equilibrium GDP.

3 ideas
The core apparatus is the AS-AD model linking price levels to real output. Shifts in either curve explain inflation, recession, and the effect of policy shocks on equilibrium GDP.
The text separates government spending and taxation (fiscal) from central-bank interest and money-supply tools (monetary). Each acts on aggregate demand through distinct channels and lags.
It drills the definitions and measurement of national accounts, price indices, and labor statistics. Mastering how each is calculated is the exam's foundation for reasoning about the economy.