ECON 2000 Lecture Notes - Lecture 84: Impossible Trinity, Autarky, Money Supply

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ECON 2000
Lecture 84
The impossible trinity
- Impossible for nation to have free capital flows, a fixed exchange rate
and independent monetary policy
- Nation must choose one side of triangle
- First option is to allow free flows of capital and to conduct an
independent monetary policy, as Canada has done since 1970
impossible to have fixed exchange rate and instead exchange rate
must float to equilibrate the market for foreign currency exchange
- Second option is to allow free flows of capital and to fix the exchange
rate as Hong Kong has done in recent years
- In this case, nation loses ability to run an independent monetary
policy, money supply must adjust to keep exchange rate at its
predetermined level
- When a nation fixes its currency to that of another nation, it is
adopting that other nation’s monetary policy
- Third option is to restrict the intl flow of capital in and out of the
country as China has done in recent years
- In this case, int rate is no longer fixed by world int rate but is
determined by domestic forces (completely closed economy) in this
case it is possible to fix exchange rate and conduct an independent
monetary policy
- History has shown that nations can and do choose diff sides of
triangle
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Document Summary

Impossible for nation to have free capital flows, a fixed exchange rate and independent monetary policy. Nation must choose one side of triangle. Second option is to allow free flows of capital and to fix the exchange rate as hong kong has done in recent years. In this case, nation loses ability to run an independent monetary policy, money supply must adjust to keep exchange rate at its predetermined level. When a nation fixes its currency to that of another nation, it is adopting that other nation"s monetary policy. Third option is to restrict the intl flow of capital in and out of the country as china has done in recent years. In this case, int rate is no longer fixed by world int rate but is determined by domestic forces (completely closed economy) in this case it is possible to fix exchange rate and conduct an independent monetary policy.

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