This may be a very rudimentary question but I am trying to discern the difference between purchasing power parity and the international dollar.
I am starting to work on a project where we are trying to look at infant mortality rates and their relation to GDP along with some other indicators from different countries. I have started to look for different data through GapMinder.
Reading some of the variable descriptions they claim to have the GDP in PPP and then some other reference GDP PPP in international dollars.
So I then took to the internet looking for the difference. The Wikipedia artilce on the Geary–Khamis dollar is leading me to believe they are the same thing if i am using USD as my base dollar unit?
So my question ultimately would be: What is the difference between the international dollar and PPP?