Is there any published data on the correlation between rent prices and vacancy?

[Kevin S.]

I'm looking for some general guidelines in the Charlotte, North Carolina area for single-family homes. I realize it depends on area, time of year, and probably 100 other factors, but surely there must be some loose correlation averages out there. Even if it's not in my area, I'd be interested in your thoughts:

This is an example of what I'm looking for:

$500-$600 in rent corresponds to an average 15% vacancy rate

$600-$700 in rent corresponds to an average 13% vacancy rate

.....

$1300-$1400 in rent corresponds to an average 6% vacancy rate