Organ donations and who gets those organs can be a morally fraught process. And that organ transplant network in the United States has been criticized for its outdated technology that has led to some deadly mistakes. But one part of that system could potentially serve as a model of success, according to David G. Robinson, author of the new book “Voices in the Code: A Story About People, Their Values, and the Algorithm They Made.” Since 1987, kidney recipients have been chosen by an algorithm. And Robinson says it could be an ethical “model” for other algorithms and potentially artificial intelligence. Marketplace’s Kimberly Adams recently spoke with Robinson about how this algorithm works and how a long process of input from nonexperts and people directly affected by kidney transplant decisions shaped it into what it is today.