Assume, please, a web site with a fair number of pages that have content that is both good and original--the kind of content that tends to rank well with search engines. What will be the effect if pages are added that consist essentially of the text of materials on other sites. The kinds of pages would be text of statutes, or of court opinions. (No copyright infringement issues.) I would not expect those additional pages to show up in searches. My question, however, is whether presence of such pages will have any effect on the ranking of pages that are original, and the site in general.

Would the answer be the same for different search engines? Google, Bing, Yahoo, etc.?