In April 2018 ewi ER&S published the study “Kosteneffiziente Umsetzung der Sektorenkopplung” on behalf of the Ministry of Economics, Innovation, Digitisation and Energy of North Rhine-Westphalia. In June 2018, the “dena-Leitstudie Integrierte Energiewende” was published with ewi ER&S as the principal scientific assessor. Both studies analyse cross-sector strategies for achieving climate targets in the medium and long term. Within the framework of the “Studienvergleich Sektorenkopplung “, similarities and differences in the design of the study are pointed out transparently and the differences in the results are presented in detail.