Yes I have a study.

Apart from the complex and quite different oral versions, the situation is straightforward enough. We have 3 different but related ballads.

A. c1620, A Lamentable Death of George Stoole of Newcastle ( contributes 2, maybe 3 stanzas to the general stock).

B. c1680, The Life and Death of George of Oxford (contributes about 10 stanzas to the general stock) This ballad resurfaces in the 19thc widely printed in a variety of forms.

C. The Scottish/Child ballad 'The Laird of Gight/Geordie' which first appears from Johnson/Burns in c1792 and rapidly turns into a multiplicity of Scottish variants into the 1820s. I won't comment further as it might upset some people.

The 19thc broadsides have a few stanzas in common with the Scottish ballad but the first stanza of the broadside comes from Oxford George and doesn't occur in the Scottish versions.

Might be worth noting that in the 19thc English broadsides he is called 'Georgey' and in the Scottish ballads is called 'Geordie'.

All 3 are generally lumped together as one ballad and probably best left that way, in view of the complex crossovers.