And the model, to be manageable, must be simplified to a point far beyond mere Goedelian incompleteness and on to a point where the model becomes irrelevant and even nonsensical.  There are simply too many vectors that can barely be identified, let alone measured or controlled for.  Such exercises do show us, though, in stark fashion the firmness of the foundations of Logical Positivism and its "informed actor" and his "enlightened self-interest."