International Trade & Macroeconomic Dynamics

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Abstractions about cross-border economic forces and policy responses — trade-theoretic results (Lerner symmetry theorem, immiserizing growth, new trade theory, home bias puzzle), currency and exchange-rate mechanics (currency crisis, gold points), and monetary or econometric tools such as the Taylor rule and hedonic regression.

13 abstractions in this family — domain-specific abstractions that sit near one another in structural-signature space (k-means over structural-signature embeddings). Each is shown with its short description.

• Agflation — A period when food and agricultural-commodity prices rise substantially faster than the general price level, creating a sector-specific inflation gap with acute food-security and distributional consequences.
• Applied general equilibrium — Numerical economy-wide modeling that calibrates interdependent markets, agents, technologies and policy constraints to compute counterfactual equilibrium prices, production, income and welfare.
• Currency crisis — A financial crisis in which confidence in a currency or exchange-rate regime collapses, producing abrupt depreciation, reserve loss, forced devaluation or abandonment of a peg.
• Gold points — The upper and lower exchange-rate bounds under the gold standard at which the cost of settling by shipping gold became cheaper than buying or selling foreign bills.
• Hedonic regression — Regress the price or rent of a differentiated good on its characteristics to estimate an implicit price surface and, with additional assumptions, demand or welfare effects.
• Heteroskedasticity-consistent standard errors — Regression standard-error estimators using a sandwich covariance formula that remains asymptotically valid when error variance differs across observations under independence and regularity conditions.
• Home bias in trade puzzle — The empirical finding that otherwise comparable regions trade far more within national borders than across them, leaving a large border effect after distance, size and standard gravity-model determinants are controlled.
• Immiserizing growth — A trade-theoretic case in which output growth worsens a large exporting country’s terms of trade enough to reduce national welfare.
• Lerner symmetry theorem — The trade-theory result that an ad valorem import tariff has equivalent real effects to an equal export tax under specified general-equilibrium assumptions.
• New trade theory — A family of international-trade models explaining intra-industry trade and specialization through increasing returns, product differentiation, imperfect competition and market size.
• Oligopolistic reaction — A foreign-direct-investment theory in which firms follow rivals into overseas markets to preserve competitive balance under oligopoly.
• Paradox of toil — A zero-lower-bound macroeconomic result in which a collective increase in willingness to work lowers wages and expected inflation enough to raise real interest rates, reduce demand and decrease equilibrium employment.
• Taylor rule — A monetary-policy reaction rule that sets a nominal short-term interest-rate target as a neutral rate plus responses to inflation's deviation from target and the output gap.