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🏛️ Fiscal Multiplier Cascade

Interactive 3D simulation of the fiscal multiplier: government spending cascades through household income rounds (based on MPC and tax rate) until GDP growth converges to 1/(1-MPC(1-t)). The second panel shows how budget deficits and automatic stabilizers react to economic cycles.

Economics & Social Systems3DModerate60 FPS

⚙ Under the hood

Watch a government spending injection cascade round by round through households as a 3D ring system — each ring is one spending round, shrinking by MPC×(1-t) until GDP growth converges to the multiplier 1/(1-MPC(1-t)); toggle spending vs. tax-cut stimulus and automatic stabilizers to see how the deficit and output gap respond.

fiscal policymultiplierMPCbudget deficitautomatic stabilizersmacroeconomicsKeynesian

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install