[87tau]

Thanks for the reply. I'm not an expert in economics and also not sure how much wikipedia is to be trusted, but going by definition: "IMF publication states that "GDP measures the monetary value of final goods and services—that are bought by the final user—produced in a country in a given period of time (say a quarter or a year)", GDP is an aggregate over a time period, more like distance and not similar to velocity. GNP though is interesting, I hadn't heard of it before, I will explore it further.

[thanatropism]

Yes, but this is an artifact of discrete time.

In discrete time increments, your running velocity is an aggregate of how much you walked over an hour. Or something.