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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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Quantity Theory of Money
Model

The equation of exchange MV = PY links the money supply and its velocity to the nominal value of output. Under classical assumptions, changes in M translate proportionally into changes in the price level P.

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

Money expansion

Money supply doubles to 200 with fixed velocity and output.

Velocity collapse

Velocity falls to 3 as agents hoard money.

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

Current scenario

Price level

2.00

Nominal GDP

500.0

Money supply

100.0

Delta table

ReadoutCurrent scenario
Price level
2.00
Nominal GDP
500.0
Money supply
100.0

Analysis notes

Back to graphOpen proof