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<p>[QUOTE=&quot;robp, post: 5479537, member: 96746&quot;]Sharing the data would be pointless. Take your pick for which reason would apply best, but all make some contribution.</p><p>They don&#039;t have equal standards, either internally for what is the same nominal type, or crossing over.</p><p>The labels, certainly for non-US coins are a bit hit and miss when it comes to description.</p><p>The numbers cracked out and resubmitted are many, most with the obvious intention of changing the population distribution. Grade inflation is the name of the game for those intent on increasing the value of their holding.</p><p>The numbers cracked out and not resubmitted are many.</p><p>A lack of pictures for all slabbed coins means that even if it was recorded, you would still have to rely on them recording the previous data accurately.</p><p>There are examples of repaired coins in slabs (invariably higher value because of costs), which might change the pop reports if previously in a details slab, but equally could lead people to think there are more coins extant than is the case if they have done any research using past sales.</p><p><br /></p><p>Whilst there might be a tendency to keep coins in slabs in the US, the same cannot be said for many collectors across the world. On a personal level, I have bought and cracked out well over 100 coins including 4 of the top 9 of a particular type. Around two dozen of these coins were bought in the knowledge that the label was wrong. At least one with a population of 1 was incorrectly described, meaning that there are no coins slabbed of that type, whilst at the same time none recorded of the type in the slab. I know more people that take them out than pay good money to get another person&#039;s opinion. </p><p><br /></p><p>There&#039;s no substitute for knowing your stuff, because any attempt at combining the reports would merely add further confusion to an already meaningless set of data.[/QUOTE]</p><p><br /></p>

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