Brother grape, first of all this text is not dense or difficult. It is a straight forward analysis that, when viewed without a partisan lens, yields the following conclusion:
When measuring economic growth, employing a 1 quarter lag appears to favor democrat presidents; employing a 6 quarter lag appears to favor republican presidents. Or, to be blunt, statistics can be read any damn way by anyone.
The mish mash of "partisanship" aside, democrats and republicans each produce varying results based on luck and competency.
Mexican lemon imports prevent highway deaths
and I hate to do this to you but it is "intellectual" with 2 Ls