I have gotten involved in a legal case involving the comparison of documents for authorship determination.  I have a set of papers that are know to have been written by Mr. X.  I also have a paper, half of which is plagiarized.  The remaining half is purported to have been written by the same Mr. X.  My task is to compare the two sets of material to determine whether or not Mr. X did, indeed, write the second half of the paper.

I'm sure there are paradigms that have been developed for textual analysis of historical papers, of Shakespeare's work, etc. that could be applicable here.  In other words, I am looking for an established set of guidelines that would allow me to empirically analyze the style and, possibly, the vocabulary of both sets of writing to verify authorship.  Does anybody out there have any references that might prove of value?  They go to trial Sept. 20; I was contacted two days ago!  Any leads or suggestions would be deeply appreciated.

John

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