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That depends on the PR and number of sites in the category, and some sites need the boost. For some, it isn't a high price for a one way link without any reciprocal link required.
Another consideration, even if a minor one, is this paper that's been around for a while
When Experts Agree: Using Non-Affiliated Experts to Rank Popular Topics [www10.org]
Our approach is based on the same assumptions as the other connectivity algorithms, namely, that the number and quality of the sources referring to a page are a good measure of the page's quality. The key difference consists in the fact that we are only considering "expert" sources - pages that have been created with the specific purpose of directing people towards resources.
We could take how they're defining expert sources to be authoritative directories or hubs
We define an expert page as a page that is about a certain topic and has links to many non-affiliated pages on that topic.
There may or not be any way to tell whether that's coming into consideration with scoring, but it's probably safe to think that links from "expert" sites like that can help identify those sites that can be considered to be in certain "neighborhoods" or web communities.
Some of the philosophy behind that:
How Teoma Works [sp.teoma.com]
What are the advantages of a Yahoo listing?
If the SERPS are Google's
That statement is sort of misleading. I assume when you say "yahoo listing" that you mean the directory listing that cost $300.
Yes, I meant the directory listing that costs $300. Is there some other kind of Yahoo listing?
If you do a search in the yahoo directory, it does not return "google serps". Only the yahoo web search returns google serps.
I will clarify... I meant searching by using the huge box at the top of the page that says "Search" by it.
yahoo has it's own directory whereas google uses the ODP.
I thank you both for clarifying that I am not missing something. There are no compelling reasons to spend the money that I was previously unaware of.
When I look at my favorite category in the Yahoo directory, I see lots of competitors. But when I search Google or Yahoo (by using the huge box at the top of the page that says "Search" by it), I get different competitors entirely. This has led me to believe that some companies in my cat invest time in SEO, and some throw money at it. Perhaps doing both would be the best for some, but I am still not convinced it would be worth the money for my company.
It looks like to me that while yahoo has it's own directory, it still uses ODP.