Currency in my home country has begin fluctuating a lot and every time I have to convert values in dollar or pounds they changes a lot. Is there any standard for converting currency from past in recent scientific publication?
For example: I want to describe Government investments predictions from 20011 to 2014 in a specific area. The values were announced in 2011. So I am not sure if I consider dollar quotation from that year or dollar quotation from now and what is the right way to do it.
You can use nominal or real effective effective exchange rate indices of your currency to express the values of government investment in the years mentioned.
What Shahnawaz said. You should be able to find appropriate indices for your country here:
http://unctadstat.unctad.org/wds/ReportFolders/reportFolders.aspx?sCS_ChosenLang=en
international comparisons using exchange rates are excessively volatile. A better approach is to use measures of the more stable 'purchasing power parities'. These are calculated as part of the International Comparison Programme and can be found in OCED and IMF publications.
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