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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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Harrod-Domar Growth
Model

The warranted growth rate equals the savings rate divided by the capital-output ratio: g = s/v. A higher savings rate finances faster capital accumulation, while a higher ICOR means each unit of new capital produces less additional output.

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This model uses static comparative statics -- no genuine time axis exists.

Shock presets

Savings boost

The savings rate rises (e.g., through policy incentives), raising the warranted growth rate.

Efficiency gain

Capital becomes more productive, lowering the ICOR and raising the warranted growth rate.

Depreciation rise

Faster capital wear-out reduces net investment and lowers the effective growth rate.

Controls

Diagram, readouts, and summary update with each change.

Saving

Technology

Initial conditions

Impact summary

Warranted growth rate

Warranted growth

1.67

Savings rate

20.0

Capital-output ratio

3.00

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