 Professor Robert Alter of the University of California, Berkeley, noted several differences between the accounts in and all of which he argued reflected the distinctive aims of Deuteronomy.Jethro conceives the scheme in but is not mentioned in and instead, the plan is entirely Moses's idea, as Deuteronomy is the book of Moses.In Moses entrusts the choice of magistrates to the people, whereas in he implements Jethro's directive by choosing the judges himself.