A kinetic and regional chemical study of the Evelyn effect has been described.  The results, in the Journal of Chemical Education, made claims involving the mechanism by which the dehydrations occurred.
The article looks into the claim of having E1 and E2 mechanisms occur in the reaction.
The researchers measured the kinetics of the formation  of a 3 degree carbocation’s and compared them to theoretical calculations that would occur if the experiment ran as an E2 reaction.   Instead, the reaction showed a mechanism that initially formed a 2 degree carbocation, utilizing an E1 pathway.  Their conclusion was that the mechanism is neither E1 or E2 but rather “E-2 like”, exhibiting first order kinetics.