Benko,
If you are not a lawyer or negotiator, you should be.
Thanks... I think. I know what you medical guys think of lawyers, so I'll perhaps reserve too much pride from that compliment

.
1. True or false many factors (aside from welfare) affect employment?
2. If that is true, then how can you use use a graph of unemployment to conclude anything about the effects of any one of those factors on unemployment?
1. True
2. You can use a graph to prove a negation of an assertion.
For instance, if you were to argue, "Democratic presidents cause recessions within a short period of them being in office due to (factor a, factor b, factor c, etc)"...
If I showed you a graph that showed that there have been consistent streams of democratic presidents that have had growing economies, then I haven't PROVEN they caused them, but I've proven your statement false.
But this doesn't really apply here.
But if you're saying that "stone's graph doesn't prove much," I actually agree. The whole "capitalism causes unemployment" thing is a bit of an odd statement. Capitalism vs what? Are we really "capitalist" or some mix? What mix yields the lowest unemployment, consistently?
Capitalism is JUST ONE theory of property norms, and even within capitalist thought you have a pretty wide disagreement on how property is established, what "rights" people have over property, etc.
I do believe that there are multiple factors that cause economic adjustments we call "recessions." Here are a few:
1) Use of debt (an economic obligation to another) to grow economically, rather than not engaging the "liability" side of your balance-sheet, and living with less growth opportunity. Causes higher growth, in some cases actually reduces risk if used properly, but at higher systemic risk if used improperly.
2) Use of a single unit of payment based on a finite source (like gold, or even the Euro). If a macro economy can "repay" its debts by just giving a guy a pig, plumbing his bathroom, or doing his taxes, you have a flexible economy if there is a malinvestment debacle or "payment-system shock." If a macro economy HAS to use dollars to repay debts and is accustomed to using dollars to buy stuff, you have a huge amount of rigidity you have to overcome somehow (central bank & fiat currency, perhaps), or live with the shocks of.
3) Buying shit we don't need for limited short-term gain. The less "necessary" our purchases our, the more volatile the demand for those items will be in a shock. I say this while shaking my head at myself, however, because the very addictive nature of these things is what makes them survive recessions. eg, liquor stores.
4) Go into debt obligations for long-lived assets that don't add material fundamental value to our lives... similar to #3... but this is especially important to highlight that we're combining #1-3 into one big clusterf*ck of risk.
For all this, I don't think allowing our economy to sputter at 80% capacity due t an economic Mexican Standoff is going to make things "better" for us in these regards, which is why I remain a "Keynesian" of sorts.
"Men did not make the earth. It is the value of the improvements only, and not the earth itself, that is individual property. Every proprietor owes to the community a ground rent for the land which he holds."
- Thomas Paine