North–South model¶
Findlay's stylized two-region growth model linking a manufacturing North and primary-exporting South through trade and terms-of-trade feedback.
Core Idea¶
Findlay's North–South model couples two stylized growth processes through international trade. The North is a manufacturing economy analyzed with Solow–Swan-style growth; the South is a primary-exporting economy with a simplified Lewis-style modern sector. Both specialize completely, exchange only manufactures and primary goods, and the South depends on imported northern machinery. The model is an explanatory representation, not a map of all actual countries named North or South.
Its decisive link is the terms of trade, defined in the frozen account as the primary-good price divided by the manufactured-good price. Northern demand for southern exports and southern export supply respond to that ratio. Under the model's restrictive closure, faster Southern expansion depresses that relative price and checks its long-run growth, so the South's rate is tied to the North's. This conditional result helped dependency-theory discussion, but diversified production, changed demand, trade barriers, or different accumulation rules move beyond the derivation. The entry does not turn a model assumption into historical inevitability.
Scope of Application¶
These uses require the two specialized regional economies and the trade-price feedback, not just a geographic contrast.
- Development-model comparison. Contrast trade-coupled growth with closed-economy growth mechanisms.
- Terms-of-trade reasoning. Trace how a relative export price can feed back into accumulation.
- Dependency-theory interpretation. Identify which conditional model result is invoked as support, without treating it as empirical proof.
- Structural-change analysis. Locate where diversification or import substitution departs from the two-good assumptions.
Clarity¶
Identify the Solow-like manufacturing North, Lewis-like primary-exporting South, two-good specialization, and θ as the primary/manufactures price ratio. Inclusion: Relative-price feedback links Southern export growth to the long-run rate inside this model. Exclusion: A North–South map or dependency slogan alone has no such equations. Nearest boundary: If the South diversifies into manufacturing, complete specialization fails and the model's no-catch-up result no longer follows unchanged.
Manages Complexity¶
The model reduces heterogeneous economies to two production systems and one connecting price. This isolates a nontrivial feedback: greater primary exports can worsen their relative price. The compression also hides domestic heterogeneity, multiple goods, institutions, and technological upgrading, making assumption audits essential before empirical use.
Abstract Reasoning¶
- State the North's Solow-like and South's Lewis-like growth assumptions.
- Check complete two-good specialization and the South's imported-manufacture dependence.
- Define the relative primary/manufactured-goods price and its demand/supply response.
- Follow how faster southern supply changes that price and feeds back into its growth.
- Test whether diversification, elasticity, or trade-policy departures invalidate the model-specific conclusion.
Knowledge Transfer¶
The trade-price-feedback audit can inform other center–periphery models when goods, demand elasticities, and growth closures are re-specified. Findlay's particular two-good no-catch-up inference does not transfer to diversified economies, different price responses, or empirical forecasts without new support.
Relationships to Other Abstractions¶
Current abstraction North–South model Domain-specific
Parents (1) — more general patterns this builds on
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North–South model is a kind of Economic Growth Model Domain-specific
Findlay's North–South model specializes long-run economic growth modeling by coupling two accumulating production systems through a trade-price feedback.
Hierarchy paths (8) — routes to 6 parentless roots
- North–South model → Economic Growth Model → Capital Accumulation → Capital Stock → Accumulation
- North–South model → Economic Growth Model → Equilibrium → Fixed Point
- North–South model → Economic Growth Model → State and State Transition → Phase Space
- North–South model → Economic Growth Model → Capital Accumulation → Capital Stock → Discounting (Present Value) → Commensurability
- North–South model → Economic Growth Model → Capital Accumulation → Capital Stock → Discounting (Present Value) → Time Preference (Discounting Future) → Preference
- North–South model → Economic Growth Model → Capital Accumulation → Capital Stock → Discounting (Present Value) → Time Preference (Discounting Future) → Time
- North–South model → Economic Growth Model → Capital Accumulation → Capital Stock → Discounting (Present Value) → Time Value of Money → Time Preference (Discounting Future) → Preference
- North–South model → Economic Growth Model → Capital Accumulation → Capital Stock → Discounting (Present Value) → Time Value of Money → Time Preference (Discounting Future) → Time
Neighborhood in Abstraction Space¶
North–South model sits in a moderately populated region (40th percentile for distinctiveness): it has near-neighbors but no dense thicket of look-alikes.
Family — Economic Growth & Development Models (22 abstractions)
Nearest neighbors
- Import Replacement — 0.89
- Heckscher–Ohlin Model — 0.88
- Sales and Operations Planning — 0.87
- Net material product — 0.87
- Intertemporal Equilibrium — 0.87
Computed from structural-signature embeddings · 2026-10-08