Two-sided platforms enable and supplement transactions between buyers and sellers. We consider a decision problem facing two such platform firms competing in a market. Each firm needs to divide its budget of a planning period between promotion towards attracting new sellers and new buyers. We...

We study the selection of people when unequal payoffs are inevitable, but fair procedures are feasible, as in selecting one person from several candidates for a job. We show that allocators may be influenced by their similarity with a recipient, leading to favoritism in outcomes. We study four...