Co-Editors’ Note

Demography is a scientific journal that publishes peer-reviewed research on a broad range of topics related to the study of human populations.Part of our intellectual growth as a field is to encourage debate and exchange, and the forum the journal provides for this activity is a Commentary.Commentaries are designed to focus on the scientific issues raised in a published paper and to reflect current conversations in the field.In the August 2017 issue (Vol.54, No. 4), we published a paper by Daniel Goodkind on the population averted by China's birth restrictions.This paper generated a heated reaction from several scholars both in e-mails to the co-editors and in discussions in other forums online and in print.Early in this conversation, and consistent with our philosophy, we welcomed the submission of commentaries, coupled with the opportunity for the author to respond.Further, we waived the typical word-length restrictions that are placed on commentaries published in Demography.Three commentaries and an author reply were received and are

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