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Macro by Mark
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Macro
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OverviewThe flagship learning arc.ConceptsCore measures, terms, and mechanisms.PolicyFiscal, monetary, and transmission routes.
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ModelsEmpirical, structural, and theoretical routes.GlossaryFast definitions while you learn.
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Theory-Based Models

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Macro by Mark

U.S. macro data with release timing, boards, and macro context.

Public U.S. data from agencies and market feeds.

MarkJayson.com

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Theory-Based Models

Overlapping Generations Model

A two-period overlapping-generations framework linking saving, population growth, and capital accumulation across cohorts.

Advancedphase path
CatalogOverviewExploreProofCompare

Theory-Based Models

Explore

Route section

Adjust the controls, keep the diagram in view, and save or share the resulting scenario.

Scenario

OLG scenario

This page starts from the current parameter state for the selected model.

Saved scenarios stay in this browser so you can revisit them or add them to compare.

Controls

The diagram, readouts, and summary update with each change.

Households
Demographics
Technology
State
ProofCompare
Shock presets

Aging population

Lowers population growth and changes the capital dilution term.

More saving

Raises next period capital for the next cohort.

Advanced

Steady-state cohort capital

Steady-state capital

0.26

Young wage

1.18

Old-age return

2.532

Impact summary

The OLG setup settles around capital 0.26 with wage income 1.18.

Because saving is done by the young and capital is inherited by the next cohort, demographics directly reshape the path.