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Google and Yahoo have no idea whether you have permission and they don't much care - a searcher doesn't want to find the same article again and again in the same search. Once it turns up once in the SERPs, that's enough.
I don't think that a copy of an article on a particular site would cause a dupe content penalty. I mean, your site is different (I would hope). You have different links, menus, headers, js, css, titles, descriptions, layout, etc. etc. It would be hard pressed for the algo to penalize a site for just the article, especially if the article is mixed with other articles. And think of all the news sites that pick up an AP story and run with it. I don't think these sites would be penalized either.
On one of my sites, I post articles that are posted on other sites with no problems. The pages are crawled and picked up in the index just fine. Maybe not ranked exactly where I would like them ;-) but there none the less.
There are probably many factors that go into determining whether a site is duplicating another site or not. Someone correct me if I am wrong here.
I agree. Oftentimes I will look for a specific article before buying it. My search results will show two or three sites which have free copies all on the first SERP.
Now maybe that's because I searched for it under it's exact title?
If Google punish those site, nobody will not spending the money for publish their press release to those services.
Some have stated that they believe that anything over 20% duplication will trigger it though.
If you are only listing the article in a page on your site which has sufficient content surrounding it then you should be fine. It would be seriously demented if Google were to ban sites based on a few paragraphs that matched because of the large amount of news articles on the web.
Downgrade the page value is that means the value of those page will be low and if you have got another value to that page like quality link from high pagerank and directory or may get value from authority site. Is that possible to those page will be apppeared on listing in google.
I am not sure that google will check content from what? Source code in exactly with another content site or just wording. If you arrange the page in new style like adding bold, italic, color, font and paragraph. Is google see this one is duplicated content with another site or original content.
While I am sure this isn't the case, it's odd how many espotting and overture paid listing sites seem to quite happily rank well in Google to this day - they all have exactly the same content and I don't see much in the way of a penalty happening there.
However, I have also heard that if you link from your site to the site where the content was originally published then G might notice the duplicate. For example, if you have permission to reprint an article but the author requires you to link back to his/her site.
Something else I have heard is that if your site shares the same directory structure as the original site, this might set off a red flag as well (think dmoz clones)
just my $0.02