Please note that "Log in / logout" link is located at the top-right corner of the page. This link changes accordingly to your current status. In case of "log in" you have also the possibility to create new user account.
You could also have access to courses (except exercises) as Guest with password Eco2012.
For pedagogical support please contact Ms. Kathy Velander: email@example.com
For technical support please contact Ms. Lea Sudakova: firstname.lastname@example.org