I've got a long policy/economics paper that will need to be split into two papers before any journal will be able to publish it. I can make them into freestanding pieces. But there will be significant overlap, particularly in the introduction, data description, and methods.
Is it frowned upon to have entire paragraphs be identical between two papers? Structure will be something like the following:
Introduction Para A1 Para A2 Methods/Data Para B1 Para B2
and for the other
Introduction Para A3 Para A2 Methods/Data Para A3 Para B2
In addition, some of the plots will probably appear in both papers. Will this be viewed as a problem?