[/QUOTE]
This is, by the way, a really great paper. Several takeaways, though, not the least of which is what I've already stated - that appraised values 'at the contract price' may not indicate bias, but rather just a random number within a range of value determined by the appraiser. Additional takeaways include: (a) maybe LTV should be a continuous scale instead of 'notched' (to use the paper's nomenclature); (b) if the system were geared toward one where loans were not automatically declined, but rather, terms re-negotiated, there might be less tendency for bias?; (c) if the lending community can still exert so much influence on appraisers - even though they (the appraisers) are bound to the Ethics Rule of USPAP, how best to eliminate that bias? Instead of decrying the bias of appraisals, what if the pressure to confirm the bias was eliminated at the lender level?; (d) instead of 'point estimates of value', if appraisers were allowed to reconcile to ranges of value (a more reasonable scope of work), would that reflect in more accurate appraisals? (e) how can an AVM be a good predictor of default? Default is related to the credit decision. The only correlation between default and value that I see is LTV which, if there is such bias in appraisals, is not even a good factor for determining creditworthiness, no? To use hyperbole, let's say a borrower is purchasing a home for $500,000, and is putting $100,000 down. That is an 80% LTV (CC's aside for now). Now, assume that the 'true' value of the home is only $400,000. Even though the borrower put $100k down, it's still a 100% LTV (i.e. the lender is still loaning $400k). Assuming a strong credit score, and adequate assets, what are the chances the borrower will default, and lose the $100k investment (not counting any monthly payments he/she may have made)? I'd guess - very low...
So, then, at the end of the day, what is the value of an appraisal? Or AVM for that matter (or any method for estimating the value of the collateral)? IOW - how important is the LTV component of the credit decision? At the transactional level, I'd say there are probably compelling arguments either way. One item not addressed in the paper, however, is the use of appraised values for estimating the overall value of the MBS, no? And are the purchasers of MBS willing to use AVM values in pricing those bonds? IOW, in reality, the appraisal has value well beyond the transaction - it goes to the perception of the market of purchasers of MBS - i.e. the agencies' clients. And my guess is that the 'good ole' appraisal' is still the gold standard...