When things are good nobody asks why. When things are too good to be true, only a few realise that it is true. When things finally turn bad everybody finds out that the emperor has no clothes on. Then, promising politicians take over the crisis to save the world. Is this process just human...

We consider whether openness is related to the aggregate technical efficiency in the OECD countries. We obtain efficiency measures using Data Envelopment Analysis and we find that our measure of openness is positively related to the technical efficiency scores.