The depth of URL directories affects PR?

[Raymond]

My main page is a PR4. All other pages within the same root has obtained a PR3. The pages in deeper directories get PR0. However, those "deeper URL" are all directly accessible from the main PR4 page. Why don't they inherit some PR from the main page?

www.xyz.com - PR4
www.xyz.com/info.asp - PR3
www.xyz.com/dir01/dir02/index.asp - PR0

All these links are directly accessible from the main page.

Will breaking down the directory structure help improving the PR distrubution?

[Gus_R]

Hi, there is no relation between pr calculation and url content.
It's all about number of inbound and outbound links.
Deep pages get less pr than index because have less inbound links.

[robertskelton]

There used to be, and maybe still is, a clear rule - reduce the PR by 1 for each directory level. This applied to large sites which had many pages that had no inbound links of their own, and the Google Toolbar made an estimate of PR.

Lately I have found that rather than actual directory structure, Google looks at virtual directory structure.

My site comprises of just the top level directory, but recently Google has estimated PR for pages without inbound links based on the link structure of the site. It is still reducing PR by 1 for each virtual directory.

I am using a Yahoo Directory style structure - I don't know how this affects sites with a different link structure.