Cambridge University Press and Assessment would like to apologise for a mistake in the above article. The affiliation of İzak Atiyas was originally given as TUSIAD – Sabanci University Competitiveness Forum, İstanbul, Turkey and Independent Researcher, Portugal. The correct affiliation for İzak Atiyas should have been only, Independent Researcher, Portugal.

The affiliation order of Zeren Tatar Taşpınar was originally given as Bahcesehir University, İstanbul, Turkey and then MEF University, İstanbul, Turkey. The correct affiliation for Zeren Tatar Taşpınar should have been MEF University, İstanbul, Turkey and then Bahcesehir University, İstanbul, Turkey.

The article has been corrected.