Why does a factory closing in China raise prices at a store in Ohio?
背景
International trade is not a separate branch of macroeconomics -- it is wired into every domestic outcome. Exchange rates affect inflation. Capital flows affect interest rates. Trade policy affects employment patterns and supply chain resilience.
The open-economy dimension also constrains domestic policy. Monetary expansion under flexible exchange rates works partly through depreciation, which helps exports but raises import prices. Under fixed exchange rates, monetary independence is sacrificed entirely.
涵盖内容
The current account records trade in goods and services plus net income and transfer flows. The financial account records cross-border investment, portfolio flows, reserve movements, and other asset transactions. The full balance-of-payments system reconciles these flows, with errors and omissions absorbing measurement gaps.
A current account deficit means the country imports more than it exports and finances the gap with capital inflows -- either foreign investment or borrowing. Whether that deficit is a problem depends on what the borrowed capital is used for, the sustainability of the financing, and the exchange rate regime.
开放问题
Is the trade balance reflecting comparative advantage and efficient capital allocation, or is it signaling an unsustainable external position that will eventually require painful adjustment?