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As mentioned, if you can identify the sources used for the reported figures, that should solve the problem. Art is correct in terms of the the unit of time with Q4/Q4 comparing growth from the same quarter from the prior year, and that the Y/Y based on the according calendar year. His calculations appear to be correct as well, and my guess is that it was ...


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If you could include the source(s) you were talking about that would be great. Without further info, my initial guess is that the Q4/Q4 means you compare GDP in 2018Q4 to GDP in 2017Q4. Y/Y means you compare GDP in the whole year of 2018 to that of 2017. Upon further inspection, if you take a look at the US's real GDP, you'd get the following: Growth in ...


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Nobody really cares about PPF of the country in the real life, we use "potential GDP" instead. As for the line between things considered possible and impossible, firstly, there is no universally agreed upon procedure for finding "potential GDP". Secondly, during calculation of "potential GDP" we either use subjective input from an expert OR make a rought ...


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Several articles use data sets on this issue but I am not sure that all the data sets are freely available. Valencia & Laeven (2012) use the IMF country reports to create their data set. It covers all IMF member countries since 1970. Reinhart and Rogoff (2009) have 70 countries since roughly 1900 based on a wide set of sources. Romer & Romer (...


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