# Analyse the Purchasing Power Parity Theory and Discuss Its Applicability

Pages: 5 (1908 words) Published: May 25, 2011
Question: “Analyse the purchasing power parity theory and discuss its applicability” In this essay I will analyze the theory of Purchasing Power Parity and discuss its applicability. I will begin by explaining the basic concepts of PPP. In order to get a deeper understanding of the theory I will also briefly touch on topics such as the Law of One Price, the Big Mac index and similar subjects related to the Purchasing Power Parity theory. Furthermore the PPP theory will be put in to practice and its applicability will be discussed and evaluated using real life examples. It is necessary to understand the functions of the PPP theory before giving a definition to it. The purchasing power parity theory is a measurement that is being used within the economy to compare the currencies of different countries and to see if their currencies are under or over valuated. It is also commonly used as a measurement to compare the living standard between two countries. The Purchasing Power Parity theory is developed on the basis of the law of one price (LOP). The law states that once converted to a common currency, the same good should sell for the same price in different countries. (Kalinda Mkenda, 2001) To give an example of this lets neglect all the factors such as taxes, tariffs and transportations costs. The law of one price can then be explained with the following formula: e = PSWE/PUK

where e equals the nominal exchange rate and P price.

where e is the change in exchange rate.
As stated above, the absolute PPP theory is mainly used as a tool of measuring how a currency is valuated and whether it’s under or over valuated. One very popular way to do this is using the Big Mac index (See appendix A) put together by The Economist. The Big Mac index is an index of how much a Big Mac costs in different countries. With this index we can compare the predicted exchange rate with the actual exchange rate to how a country’s currency is valued. When we compare the PPP we use a basket of goods which is identical in the comparing countries, in this case our basket is a Big Mac. When doing this we can predict an...