He completed his PhD thesis at the University of Freiburg in 1922 on the German Künstlerroman after which he moved back to Berlin, where he worked in publishing.
Ia menyelesaikan tesis Ph.D-nya di Universitas Freiburg pada 1922 di Künstlerroman Jerman setelah ia kembali ke Berlin, di mana ia bekerja di penerbitan.