Definition

The state of being equal or equivalent, whether in prices, power, or purchasing ability across markets. In finance, it's used for everything from currency exchange rates to comparing values between different assets. Economists love this word because it makes 'same-same' sound sophisticated, and it's fundamental to understanding why your dollar doesn't buy as much abroad.

Example Usage

Purchasing power parity theory suggests the Big Mac should cost the same everywhere, but clearly that theory hasn't been to Switzerland.

Source: Economics and finance terminology

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