?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Hefel&rft.au=Hefel%2C+V.&rft.aufirst=V.&rft.degree=Bachelor&rft.date=2018&rft.title=Inequality%2C+vertical+differentiation%2C+and+choice+of+residents+in+Athens%3A+A+comparative+study