Graphic illustrating the <a href="https://en.wikipedia.org/wiki/Calmfors%E2%80%93Driffill_hypothesis" class="extiw" title="en:Calmfors–Driffill hypothesis">en:Calmfors–Driffill hypothesis</a>.
<a href="//commons.wikimedia.org/wiki/User:Mapeh" title="User:Mapeh">Mapeh</a>
<span class="int-own-work" lang="en">Own work</span>