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?