Sorry, but I have come to the exact opposite assessment.

First, we must be clear on the exact meanings of these words. I would clarify by saying that the physical universe itself, is not predetermined, but is being determined, that is to say, it is being created, and so determined, at every moment. Although, it is generally assumed to be finished.

Second, the law that is calculating and so governing it, IS determined, and IS absolute. That would be physical law, or natural law (or call it whatever you want).

So yes, human beings have free will, who are free to subjectively think inside their heads, where there are no physical laws or reality, but when they act on that thought, they cannot escape the physical consequences of perfectly calculated objective reality of that action...say like jumping off a tall building.

So the lesson is, we have the free will to ignore reality, or master it.

This is where economics comes in...real economics...not the make believe kind that revolves around inside mankind's subjective head, like this praxeology. The kind of economics in the objective physical world that determines if you go splat on the sidewalk after jumping off that tall building, or you get up and walk away. The kind that determines why a ball rolls down a hill instead of up a hill. Calculated to perfection at every moment, and so absolute.

Real economics, inescapable, the holds the entire universe together, perfectly, that we must act in correctly, that is to say successfully, or we will physically fail to be a part of it...at that is painful..and is why we change our thinking and action toward pleasure, that is toward success (survival).

What I see, is the universe is determined, in that it has absolute direction with absolute calculation, but what it physically manifests on its way there is not predetermined.