Purchasing Power Parity Statistics - The Organization for Economic Co-operation and Development (OECD) publishes detailed metrics of prices and purchasing power for its member countries (of which the US is one and there are 37 countries in total co-operating in matters of global trade \& economic development) This is in addition to the World Trade Organization (which is part of the UN) and has over 164 member countries. Go to the OECD's website and download its spreadsheet file with the historical data for purchasing power parities (PPP) for its member countries. Select three countries and write about its current PPP metrics. Explain too why you selected those countries. Additionally see if you can research and find out additional information on what does the OECD and / or the WTO say about those countries Finally, express your opinion about those countries