One feature rating (the EDR) - a tool, so, like any tool, they need to be able to use. This is necessary to understand some things. I'll try them out.
1. It is impossible to develop a universal instrument in the absence of generally accepted criteria.
2. It is important to realize that in order to obtain the most objective view, use the set of tools, and ratings - is only part of them.
3. It should be borne in mind that the rating - is not only an attempt to reflect the real state of affairs, but also a way of forming a definite opinion.
4. Ratings may even be improved (polish) during its use, but, I repeat, to obtain a comprehensive and completely accurate rating possible. Etc.
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Understanding how the rating, and you begin to understand his shortcomings, which must be taken into account when working with him. Members of the western market has long engaged in these issues, we are only to be the same. Rating itself is nothing. It is very important, who and what they enjoy, that is, how an educated person, what his experience. Experience - that's very important. It is known that the practice - criterion of truth. So, buy art, gentlemen - this is the only way.
With regard to specific products (and the rating is the same product, as well as many others), it is better than the EDR, it seems, did not exist. Although personally I have accumulated a lot of misunderstandings over the still relatively long period of time. For example, one of them. What artist Nikolai Krymov was demoted in rank from 1A to 2A. Perhaps found his new work, which allowed him to delete? Yes seems to be no. All major works of this artist are well known and are mainly in museums. There are no new discoveries, it seems, is not expected. Focus from private collectors of his work has never deprive. Even more strange situation with the artist Pohitonovym: suddenly at the height of interest in his work his rating changed from 2A to 2B. This means that from the master "with a distinct artistic personality, he has turned into a merely" recognized and sought-after art market and the public. " This Pokhitonov something? It is impossible to understand how the rating may suffer, the artist, who has long left us, and therefore there is no new work on the basis of which to do it. A change in the index of "creativity" in general, beyond any reasonable explanation. Such examples, I think we'll find plenty. I tried to find explanations for the creators of EDR and found them: they are all explained banal mistake and promised to fix it to the next edition, but for some reason - it has not happened.
If this continues, then this tool (one of the few in our market) can be accused of excessive engagement and recognize unreliable, which of course, would entail a drop in his popularity. In other words, wait and see.
As for the other ratings, they do not deserve any attention because of their incompetence. And another, in my opinion, very important question - ratings should not be evaluated in monetary terms the picture, because the subject is just as much pay for it. Rating - is a product of experts, and assess themselves to buyers at auctions and in direct transactions. And if the rating needed, then they buy it and if not, then the project goes bust. It should be.