Introduction: Consequences of low turnout

Low electoral turnout has become common in many countries. Whether this is a problem for a democracy depends on—among other things—whether higher turnout would have made other parties more relevant. This introductory article discusses the findings and approaches of previous work on this question and summarizes the findings of the work published in this issue. The various articles, despite using different approaches, looking at different countries and different types of election, all show that any bias in election outcomes is typically rather small and is not in a specific direction: sometimes the left would benefit from higher turnout, sometimes other parties. Therefore the concerns about potential bias consequent on low turnout are generally misplaced.