Rosanne van der Laan Bouma obtained a joint bachelor’s degree in Political Science and Law in 2012. She is currently a master student in Civil law as well as Constitutional and Administrative Law at Leiden University. Master students in Civil Law followed the course ‘Practicum’ under the supervision of Dr. J.A. van der Weide. At the end of last year (2013), as part of the course, some 25 students (Group 7) wrote a blog text about the principle of good faith and fair dealing in the Common European Sales Law. Phinney Disseldorp and Rosanne van der Laan Bouma were asked to combine their blog texts into a Leiden Law Blog. Read their blog: ‘Good faith and fair dealing: increasing the common character of the CESL?'