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Macro by Mark

Global Economic Data, Empirical Models, and Macro Theory
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Public data from government agencies and multilateral statistical releases, anchored in official sources

© 2026 Mark Jayson Nation

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Theory-Based Models

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Keynesian Cross
Model

The 45-degree line model where planned expenditure E = C + I + G intersects the identity line Y = E to determine short-run equilibrium output. The gap between spending and income drives inventory adjustment until the two converge.

Compare

Side-by-side scenario comparison. Static equilibrium — point equilibria only.

Scenario tray

Current scenario

This is always the anchor column for the comparison view.

Presets

Fiscal expansion

Government spending rises by 20, amplified by the multiplier.

High MPC economy

MPC at 0.9 creates a larger multiplier and more volatile output.

Save a scenario from the Graph page in this browser to add more columns here.

Current scenario

Equilibrium output

600.0

Multiplier

4.00

Autonomous expenditure

150.0

Delta table

ReadoutCurrent scenario
Equilibrium output
600.0
Multiplier
4.00
Autonomous expenditure
150.0

Analysis notes

Back to graphOpen proof