Can a swimming pool add or subtract from the value of your home?

From Home Improvement Pages

This is a very common question that is asked when people are contemplating an investment in an inground swimming pool:  Will the pool add value to my home, or make it harder to sell?  This post from Home Improvement Pages explores this question head-on using data and research, the only objective way to find the answer.  As with any investment, the costs and benefits always need to be weighed out in advance before making a final decision.  With a swimming pool, or any luxury item, there are many intangible assets such as memories and recreation that have to be weighed into the positive column, and are sometimes difficult to quantify in dollars and cents terms.

Here is an excerpt from the post:

Swimming Pools: Valuable Home Upgrade or Just a Pain in the Wallet?

From Money

One of the major considerations that prospective swimming pool purchasers have is the effect on their home's value that the amenity will have.  There are many opinions on both sides of this issue, mostly from realtors that have a vested interest on either side of the issue.  This article from Money gives the straight skinny on this issue, and gives the definitive answer about home values, and it may not be what you think.

Here is an excerpt from the post: