A few weeks ago, I attended a workshop in Cambridge (MA) organized by Harvard, MIT and Princeton where I had the chance to discuss the concept of fairness with a number of experts. Based on this input revised and schnarpend earlier observation on fairness:
There are many definitions of fairness across the ideological spectrum. It cannot be expected that there will be broad agreement on a single definition.
Furthermore, different definitions of fairness might be applicable to different circumstances.
A company will need to pick a definition of fairness which it deems applicable to a certain area of application and publish the chosen definition of fairness. The algorithm should be also tested to ensure that it implements the specified fairness definition.
Based on stakeholder feedback, the company might adjust the definition of fairness. The adjustment should be appropriately documented.