This section looks at the mechanism whereby data denominated in money terms but different currencies can be transformed to a common currency.
It discusses market exchange rates both from the perspective of converting series into a common base currency and as comparative data themselves.
It considers the use of exchange rates to create indexes such as weighted exchange rates and purchasing power parity rates that can be used as more accurate bases for comparison of money data across different locations.
It indicates where exchange rate data can be found in the UK Data Service macro databanks.