In AP Macro, full employment is the output level where the unemployment rate equals the natural rate of unemployment, meaning only frictional and structural unemployment exist and cyclical unemployment is zero. It is shown graphically by the LRAS curve and the long-run Phillips curve.
Full employment does NOT mean everyone has a job. It means the economy has zero cyclical unemployment, the kind caused by recessions. There's still frictional unemployment (people between jobs) and structural unemployment (people whose skills don't match available jobs). Add those two together and you get the natural rate of unemployment, which by EK MEA-1.E.2 is the unemployment rate that exists when the economy produces full-employment real output.
On your graphs, full employment is everywhere. It's the vertical LRAS curve in the AD-AS model, the vertical long-run Phillips curve (LRPC), and the potential output line in the business cycle diagram. When real GDP equals full-employment output, the economy is in long-run equilibrium. When it doesn't, you have a gap: output above full employment is an inflationary gap, output below it is a recessionary gap. Per EK MOD-2.I.1, flexible wages and prices eventually pull the economy back to full employment on their own, which is the whole story of long-run self-adjustment.
Full employment is the reference point for basically every macro model on the exam. In Unit 2 (Topic 2.3), it defines the natural rate of unemployment under LO 2.3.E. In Unit 3 (Topic 3.7), LO 3.7.A asks you to explain how output and the price level return to full employment after a demand or supply shock, and EK MOD-2.I.2 ties shifts in LRAS to changes in the full-employment level of output (that's economic growth). In Unit 5 (Topic 5.2), the LRPC is vertical at the natural rate under EK MOD-3.A.3, so full employment literally draws the long-run Phillips curve for you. If you can't locate full employment on a graph, you can't identify gaps, and gap identification is the setup for nearly every policy FRQ.
Keep studying AP Macroeconomics Unit 3
Natural Rate of Unemployment (Units 2, 3, 5)
These are two sides of the same coin. Full employment describes the output level; the natural rate describes the unemployment rate at that output. Say one and you've implied the other.
Long-Run Phillips Curve (Unit 5)
The LRPC is vertical at the natural rate of unemployment, which means full employment in the Phillips curve model is the LRPC itself. Points left of it are inflationary gaps, points right of it are recessionary gaps (EK MOD-3.A.5).
Long-Run Self-Adjustment (Unit 3)
Full employment is where the economy heads on its own. After a demand shock, flexible wages and prices shift SRAS until output is back at LRAS. The classical claim isn't that recessions don't happen, it's that they don't last without policy help.
Inflationary Gap (Units 3-5)
Gaps only make sense relative to full employment. Output above full-employment output means unemployment is below the natural rate, wages get bid up, and SRAS shifts left until the gap closes.
Full employment shows up constantly as the starting condition in FRQs. The 2017 and 2018 SAQs both open with an economy "at full employment" and then hit it with a change, so your job is to show the economy moving away from (or back to) that benchmark. The 2021 FRQ flips it, starting with an economy "operating below full employment" and asking what follows. MCQs love the self-adjustment angle, asking which mechanism (flexible wages and prices, not government policy) returns the economy to full employment after a shock, or what happens to real wages during the adjustment. Three skills to lock down: draw full employment correctly as a vertical LRAS or LRPC, label current output relative to it to identify the gap, and explain the wage-price adjustment story that closes the gap without policy.
Full employment is not 0% unemployment. At full employment, the unemployment rate equals the natural rate, typically a positive number, because frictional and structural unemployment never disappear. People are always switching jobs and industries are always changing. If an exam answer claims full employment means everyone is working, it's wrong. The only type of unemployment that hits zero at full employment is cyclical.
Full employment means cyclical unemployment is zero, not that the unemployment rate is zero; frictional and structural unemployment still exist.
At full employment, the actual unemployment rate equals the natural rate of unemployment, which is the sum of frictional and structural unemployment (EK MEA-1.E.2).
Full-employment output is shown by the vertical LRAS curve in the AD-AS model, and shifts in LRAS represent changes in full-employment output, which is economic growth (EK MOD-2.I.2).
In the long run, flexible wages and prices restore full employment after demand or supply shocks even without government policy (EK MOD-2.I.1).
The long-run Phillips curve is vertical at the natural rate of unemployment, so the economy always returns to full employment in the long run regardless of the inflation rate.
Output above full employment is an inflationary gap; output below it is a recessionary gap, and identifying which one you're in is the first step of almost every policy FRQ.
Full employment is the level of output where the unemployment rate equals the natural rate of unemployment, meaning cyclical unemployment is zero. Only frictional and structural unemployment remain, and the economy is producing at potential output (the LRAS curve).
No. At full employment, frictional unemployment (people between jobs) and structural unemployment (skills mismatches) still exist. The unemployment rate at full employment equals the natural rate, which is a positive number. Only cyclical unemployment is zero.
They're the same condition described two ways. Full employment refers to the output level (real GDP at potential), while the natural rate is the unemployment rate the economy has at that output. EK MEA-1.E.2 defines the natural rate as the unemployment rate when the economy produces full-employment real output.
Through flexible wages and prices (EK MOD-2.I.1). In a recession, high unemployment pushes nominal wages down, which lowers production costs and shifts SRAS right until output returns to full employment. This is the long-run self-adjustment process tested in Topic 3.7.
In the AD-AS model, it's the vertical LRAS curve; equilibrium output to the left of LRAS is a recessionary gap and to the right is an inflationary gap. In the Phillips curve model, it's the vertical LRPC at the natural rate of unemployment (EK MOD-3.A.3).
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