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#1
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FWIW, I checked PSA pop report for EPDGs (883 total graded for 260 subjects = an average of 3.4 EPDGs per subject) The # graded for the following selected subjects are: Dahlen (Bos): 2 Ewing: 2 Ganley: 1 T. Jones: 2 Karger: 3 Lindaman: 7 Mullin (Horiz): 4 Lundgren (Chi): 8 Best Regards and Happy Collecting, Craig
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craig_w67217@yahoo.com |
#2
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I'm still curious how PSA and SGC pop reports relate to actual physical numbers of cards in existence. I have asked this question numerous times here, but have gotten no responses. Scot Reader posted that he came up with his "T206 hardest cards" list based, in part, on PSA pop reports, but I haven't gotten a response to my question as to how he actually used them to come up with numbers. If you really believe PSA pop reports, then (again, not to bore anyone, but I'm repeating myself for about the fourth time this year), then you have to believe that many of the tough variations are no tougher than their counterparts.
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$co++ Forre$+ |
#3
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I've been pondering if there is a statistical means (pun intended!) of coming up with a population estimate; perhaps some modification to a biological mark-recapture method METHODS OF ESTIMATING POPULATION SIZE -- MARK-RECAPTURE Best Regards, Craig
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craig_w67217@yahoo.com |
#4
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Also, (and I'm repeating myself here...again) I asked Jim Riviera if the info on T206Resource.com could be used to come up with multipliers to help us determine how many of each card, total, were produced, and he said, "Yes". Yet, that also hasn't gone anywhere. No offense to any of these guys, but I'd love to see them answer some questions here and participate in discussions, rather than wait until they have a research paper published on their site (T206Resource.com), and then sending us a link. Tim, Jim - get involved in the discussions here, please.
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$co++ Forre$+ Last edited by Runscott; 05-03-2012 at 08:05 PM. |
#5
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Regarding the OP my thoughts on the Schulte weren't published on T206Resource.com but are in the addendum of the REA listing. P.S. - Rivera ![]() Last edited by Abravefan11; 05-03-2012 at 09:40 PM. |
#6
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Tim, I'm glad to hear you say this, but the proof's in the pudding. Rather than say you will participate and answer questions, simply do it.
We've had quite a few great T206 discussions where I know you and Jim had thoughts, and I waited to hear them....and waited....and nothing occurred. An example is the discussion about whether or not the recently numerically-graded Plank could have actually been anything other than hand-cut. Again, as NIKE would say, JUST DO IT. Your published works on your website are great. Keep up the good work.
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$co++ Forre$+ |
#7
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#8
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#9
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Shown here, I have provided the current data from SGC's pop reports of these 8 cards. Can some one here please provide the corresponding
data from the PSA pop reports ? Of course, there is no way of knowing from these numbers how many times these cards have been re-graded. Subject ............. P 350 ....... EPDG ........... P 150 ...... SOV 150 ...... SC 150 ....... HINDU DAHLEN ................ X ............. 1 ................. 28 ............. 1 .............. 17 .............. 1 EWING ................. 1 .............. 5 ................. 53 ............. 6 .............. 40 .............. 3 GANLEY ................ 6 ............. 4 ................. 48 .............. 6 .............. 36 .............. 6 T. JONES .............. 4 ............. 3 ................. 64 .............. 4 .............. 39 .............. 3 KARGER ................ 3 ............. 4 ................. 46 .............. 7 .............. 25 .............. 0 LINDAMAN ............ 1 ............. 3 ................. 58 ............... 1 .............. 24 .............. 6 MULLIN ................ X ............. 1 ................. 37 .............. X .............. 16 .............. 0 SCHULTE .............. 0 ............. 0 ................. 47 .............. 1 .............. 13 .............. 5 NOTE I substituted " X " for Dahlen in the P 350 and Mullin in the P 350 and SOV 150 columns, since the SGC pop report shows NO graded cards for these respective backs on these two cards. My collection includes Dahlen with a P 350 card. And, three Mullin cards....one P 350 card and two SOV 150 cards. TED Z Last edited by tedzan; 05-04-2012 at 10:28 AM. |
#10
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I was asked my opinion about the Schulte being scrap. From the scans I don't see anything that would lead me to believe that it is scrap. It may be, but it's not evident to me from the scan.
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#11
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$co++ Forre$+ |
#12
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PSA pop report is now available with free registration. I've been dabbling in it but still haven't quite figured out if there is a way to break out the different series (example: It just shows total Piedmont but doesn't break out the P150 from the P350). Anyways, here is what I just pulled up (it was quicker to convert them to images than for me to try to remember something about formatting html tables!):
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craig_w67217@yahoo.com |
#13
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LEE....well said in post #39 " You can eliminate one Ewing EPDG off the PSA pop report. I have crossed it into a SGC holder. I don't think that I need to point out that this is a big reason why these pop reports can only being taken with minimal accuracy. " Lee Although, I posted these SGC numbers (for comparison sake) ...... I'm in complete agreement with you regarding POP reports. TED Z Last edited by tedzan; 05-07-2012 at 11:17 AM. |
#14
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I've been working on this problem since the beginning of the year. But, it's a tough nut to crack and I'm still a long way from cracking it. The attached charts show some of my preliminary scarcity models, starting with linear and progressing to bounded logarithmic transforms. But I can't arbitrarily pick a model. I need a better understanding of the populations. That is what I alluded to above about exploring the "mark and re-capture" methodology. So even though from one perspective it may appear to be going nowhere, it is being actively pursued. Best Regards Note - The following scarcity distribution models are examples. None have been proven accurate and they should not be interpreted as fact.
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craig_w67217@yahoo.com |
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