I'm not trying to argue Dems vs Repubs. I'm saying that the main evidence quoted in the thread - number of jobs during a president's term - doesn't logically prove anything if the duration of the biggest effects is different from the timeframe being assumed.
The article has that cool moving chart that "proves" its point by showing the data for immediate effect upon taking office, a six month time lag and a year time lag. It does not address effects that take longer periods such as a decade, nor does the show much consideration of such long timeframes.
PS. I see the comment that a quote from the article addresses my point, but respectfully, the quote doesn't give an adequate analysis. Yes it briefly considers that one president's actions can have effects in another's term, but that part of quote assumes a partisan argument that I did not make, and therefore supports its point with a partisan analysis. The evidence it does cite - that Republicans run larger deficits - could be significant, but someone would have to find a way to determine the timing when that has its biggest effect, and also the timing when other policies discussed in the article have their biggest effect, combine the various effects over time (or separate them analytically despite their real life overlap) and show causation. That seems tricky to me and it's not at all clear from what the author writes that it was seriously tried. The rest of the article's discussion assumes short term results as the important ones.
There has been serious research on this - FYI, and this paper has even be obliquely referenced in the NYT article :
https://www.princeton.edu/~mwatson/papers/Presidents_Blinder_Watson_Nov2013.pdf.
Final two paragraphs from the conclusion from this paper:
It seems we must look instead to several variables that are mostly “good luck.” Specifically, Democratic presidents have experienced, on average, better oil shocks than Republicans, a better legacy of (utilization-adjusted) productivity shocks, and more optimistic consumer expectations (as measured by the Michigan ICE). The latter comes tantalizingly close to a self-fulfilling prophecy in which consumers correctly expect the economy to do better under Democrats, and then make that happen by purchasing more consumer durables. But direct measures showing increasing optimism after Democrats are elected are hard to find.
These three “luck” factors together (oil, productivity, and ICE) explain 46-62% of the 1.80 percentage point D-R growth gap. The rest remains, for now, a mystery of the still mostly unexplored continent. The word “research,” taken literally, means search again. We invite other researchers to do so.
TL;DR:
1. Luck plays a role, and explains about half of the gap in growth (not jobs, where difference is MUCH bigger).
2. They set up many other plausible hypothesis (e.g. fiscal/monetary policy) and disprove them. You are basically trying to argue this point as hypotheticals - it has been addressed in this paper. e.g. your "timing" question would be specifically countered by the "Trends and mean reversion" chapter in this paper. Much of the other statistical tools would also implicitly counter it. e.g. very simplistic approach, not taken in this paper probably because it would seem silly in a serious economic research - if you only take the second/third terms of same-party-presidency - does the effect disappear? But there are other, more serious statistical tests in the paper disproving some of this simpler counters like the ones you are proposing to disprove the result.
If you were a professor guiding my PhD thesis in economics, then I would probably not propose such a partisan and "useless" topic for my PhD dissertation. I would likely not even present a conference paper with the level of evidence that exists without basically giving a "I dunnno" answer in the end - just like Blinder and Watson did. If I did any of that, you or anyone else would be more than justified in handing me my a*se backwards.
That ivory tower criticism, however, does not address the problem that Heritage/AEI and the rest of the right wing propaganda network has basically run away with the narrative exactly backwards and brainwashed most of the American population.
How do you address that?
Option 1: Set up an easy to disprove hypothesis like "No, economic data does not suggest Republican presidents are better for the economy. Arguably, a lot of data exists tentatively indicating just the opposite, subject to further serious research.".
Option 2: Ignore the easy to disprove, partisan hypothesis; set up a goal that is worthy of serious research; try to find evidence for such positive hypothesis; and conclude "I dunno".
To me, it seems Option 2 is better when deciding the topic for a PhD dissertation, while Option 1 is infinitely better when dealing with the likes of Heritage/AEI/Faux/Sinclair.
Do Heritage/AEI/Faux/Sinclair provide the standard of evidence demanded by option 2 (that you seem to be demanding) when dealing with this topic?