No, likely because there's too many factors in that equation. I don't think you can get even riders of the same bike and style of riding to agree on a broad recommendation, let alone useful guidelines for all bikes, loads, riding styles, road conditions, etc.
That said, I go with manufacturer's recommendations which are 36psi both front and rear. My tires would have to be over or under-inflated by at least 5psi for me to be able to tell the difference. Therefore, I don't check my tire pressure very often, usually once a month or so. I didn't check it at all during my three week 15,000Km trip and although I was considerably less confident in corners by the end of the trip I attribute that to the changed tire geometry rather than pressure.
As you can see the Shinko Raven 009 got a pretty bad flat spot (actually even a bit concave), but that's to be expected on such a trip. Considering it's price, the fact that it's a single compound tire with longevity comparable with Michelin Pilot Road 2 I conclude that Shinko is by far the best bang for the buck. No rear tire I know under $200 would perform that well for me, and these cost $170 for both front and rear, delivered to my door.
Speaking of pressure, I think I should have kicked it up a notch, maybe to 40psi, having in mind that the bike was fully loaded. That would likely extend it's life a bit, make the flat spot less pronounced and the handling a bit better by the end.
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