Question almost as short as the title:

The score we get for economics; is it based on income, ie. the amount we make each turn that we see going to our treasury, or is it a function of our overall eceonomy?  I ask because, due to differences in the way production and bonus production are "charged", sometimes there will be an increase in income just by increasing the research slider while decreasing the other two.

Will I score higher in economy if i have more take home each turn?

I realize too that part of the change I see in income when i adjust the sliders is some social spending going back to the thresaury on planets without starbases and not building anything. Still the question about scoring remains the same.