Prevent authors from creating new posts/pages (remove 'Add new' button)

We have a number of users set up as 'Authors' who manage several hundred page across our website. We do not want these users to be able to create new pages/content themselves, and instead only want this to be available to Editors/Administrators. Would it be possible to add a content flow option to prevent certain roles from creating new content, in our case 'Authors'? E.g.: 'Prevent authors from creating new posts/pages' YES | NO