I am writing an empirical paper with National Account's data from the OECD. The analysis of the data consists basically in calculating the cross-correlations among countries of GDP, investment, consumption etc, over a period from 1960:1 to 2015:1.
The problem is that there is a huge amount of measurements available in OECD's website and I don't know which one to choose.
The OECD's website suggests that:
To extract the historical series, the measures to be selected are: CARSA or VOBARSA for data expressed in national currency (respectively in current prices or volumes estimates) and CPCARSA or VPVOBARSA for data expressed in US dollars and GPSA or GYSA for quarter-on-quarter and year-on-year growth rates.
I think that might be adequate for me.
But I still don't know if I should choose between the data in current prices or in volumes estimates.
What are the differences between the two approaches? Which implications would I be faced with by choosing each of them?