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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.

What growth rate can an economy sustain given its saving behavior and capital efficiency?

Composition

ggg
Growth rate

The warranted rate of output growth, equal to s/v ...

YYY
Output

Real GDP that evolves over time at the warranted g...

KKK
Capital stock

The accumulated stock of physical capital used in ...

sss
Savings rate

The fraction of output saved and available for inv...

vvv
Capital-output ratio (ICOR)

Units of capital needed to produce one unit of out...

GraphProofCompare

Short Run Equilibrium

Warranted growth

1.67

Savings rate

20.0

Capital-output ratio

3.00