Does it hurt my PR if I link to others buy others don't link back?

[PowerUp]

Does it hurt my PR if I link to others buy others don't link back to me?

One of my link partners recently migrated her website. At her new site, she stored all her links using a service from blogrolling. This makes all the links uncrawable by robots.

If this is going to hurt me then I'll respond by adding a "no follow" on the outbound link. Does this help? If yes, then I'll incorporate this on other outbound one-way links as well.

[justablink]

Your PR is not effected by linking out (unless to bad neighborhoods), but it certainly is effected when a prior link is lost (if that link had any value to begin with). In your case, your link partner is no longer a link partner, as their outbound link to your site has a no-follow. So, since they are not sharing any link love, you might as well delete their link.

However, if this link "partner" was important to both of you, perhaps they just overlooked your link. If this is the case, contact them and have the no-follow removed. Send an email that says "we recently noticed that your link to our site now shows a no-follow designation. We would like to continue our linking partnership, so please remove the no-follow. Our link to you can be found at (your site link here). Our link to you will remain active only for 5 more days etc. etc.
justablink

[matrix_neo]

Linking out does not affect your PR, If your partner's link page is not crawlable then you will not get the PR benefit and your partner will.

[linsys]

Linking to a site that does not link back to you does not effect your PR, actually linking to highly trusted sites in your niche can help your ranking for specific keywords (not your PR, just your ranking for specific keywords, don't worry too much about PR, it takes for ever to update and doesn't mean much these days, there are 100 other things the SEs take into consideration besides back links).

Try it, you might be surprised by the results.