RT Journal Article SR Electronic T1 Understanding choice, pressure and markets in kidneys JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 277 OP 278 DO 10.1136/medethics-2019-105781 VO 46 IS 4 A1 Luke Semrau YR 2020 UL http://jme.bmj.com/content/46/4/277.abstract AB Here, I briefly respond to a recent paper by Julian Koplin, in which he criticises my earlier work in this journal. I show that Koplin has misunderstood the distinction I have made between pressure to vend and pressure with the option to vend. I also show that his pessimism about the market regulations I favour is unwarranted.