The pros and cons of hybrid open access are heavily disputed. A main point of discussion
is whether ‘double dipping’ takes place, i.e. paying twice to publish and read the
same article. To prove publishers’ assertions that they do not double dip, a survey
was conducted of 24 publishers with detailed questions about their pricing policy
using concrete examples. The outcome is quite sobering: the results range from partial
double dipping to full double dipping, and in no instance did a ‘no double-dipping’
policy mean that no double dipping takes place.