Austin
Elite Member
- Joined
- Jan 16, 2002
- Professional Status
- Certified General Appraiser
- State
- Virginia
Brad: The time element represents different levels of supply and demand. Time is the distance between two supply/demand levels that is why I say it is not a time adjustment it is a market conditions adjustment and when the adjustment is always some figure like 1% per month it is suspicious.
Here is the other problem I have with a time adjustment under your circumstances: If the market is that hot, then there should be tons of comparables less than two months old. That being the case, a time adjustment of 1% per month is not supportable with data because no properties are bought and sold within that time period. How do you know the market has not dropped 5% or gone up 2% per month instead of 1% per month? To measure the different supply/demand levels, you have to have a beginning and an ending period; otherwise you are extrapolating as my above example about my grandson’s weight and height. You are also extrapolating when you estimate 1% per month for the same reason.
You say you don’t want to insult me about my statistics, but when you figure a time adjustment based on the methods you are using, all you are doing is extrapolating an unsupported trend line and no mathematician would extrapolate anything. If you can’t bracket it, you can’t measure it.
Jtrotta: You just made my point about extrapolating a trend line. You are predicting the future when you extrapolate by making a time adjustment because you don’t know when a downturn comes until the data supports the down turn, then we may be in an up turn. Thanks for making my point. I hope you can interpret that.
Speaking of the “all-stars” out there predicting the future, you and brad are good candidates because that is exactly what you are advocating. Do you guys have any stock tips? I think you two guys must have attended the MRS. Cleo Institute. Maybe you two should get together and have your own TV show since Mrs. Cleo bit the dust. She was a Voodoo Quack as it turns out. Time caught up with her as it is with you two guys.
Here is the other problem I have with a time adjustment under your circumstances: If the market is that hot, then there should be tons of comparables less than two months old. That being the case, a time adjustment of 1% per month is not supportable with data because no properties are bought and sold within that time period. How do you know the market has not dropped 5% or gone up 2% per month instead of 1% per month? To measure the different supply/demand levels, you have to have a beginning and an ending period; otherwise you are extrapolating as my above example about my grandson’s weight and height. You are also extrapolating when you estimate 1% per month for the same reason.
You say you don’t want to insult me about my statistics, but when you figure a time adjustment based on the methods you are using, all you are doing is extrapolating an unsupported trend line and no mathematician would extrapolate anything. If you can’t bracket it, you can’t measure it.
Jtrotta: You just made my point about extrapolating a trend line. You are predicting the future when you extrapolate by making a time adjustment because you don’t know when a downturn comes until the data supports the down turn, then we may be in an up turn. Thanks for making my point. I hope you can interpret that.
Speaking of the “all-stars” out there predicting the future, you and brad are good candidates because that is exactly what you are advocating. Do you guys have any stock tips? I think you two guys must have attended the MRS. Cleo Institute. Maybe you two should get together and have your own TV show since Mrs. Cleo bit the dust. She was a Voodoo Quack as it turns out. Time caught up with her as it is with you two guys.