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<p>[QUOTE="Curtis, post: 8463660, member: 26430"]Interesting, thank you for sharing the data. I've tried to gather data over a similar period (2015-2021) for Lysimachos Tetradrachms but limiting it to examples that have sold twice at least 18 months apart, and found a similar increase (usually 2-3X, virtually none sold for less after 2019). I think I found somewhere around 20 or 30.</p><p><br /></p><p>Of course, there are obvious methodological challenges the either approach, but since no one's developed any ideal ways to test price trends for ancients, the best way to address the issue is by triangulating with different kinds of data and seeing if they tend to agree.</p><p><br /></p><p><span style="color: #808080"><b>[See EDIT in maroon below] </b>What I collected wasn't fine grained enough to notice seasonal patterns. But I notice from your plot, just impressionistically, it seems like there's a drop every summer. That would fit the prevailing wisdom. (Of course, it's possible that similar coins with less tangible differences, sell at different times. E.g., Maybe those of the finest style and greatest eye appeal are the ones that get put it in the high-profile January auctions.)</span></p><p><span style="color: #b30000"><br /></span></p><p><span style="color: #b30000">[<b>EDIT</b>: Per clarification below, the data don't reflect seasonal changes. Nonetheless, very useful and glad they were shared!]</span>[/QUOTE]</p><p><br /></p>
[QUOTE="Curtis, post: 8463660, member: 26430"]Interesting, thank you for sharing the data. I've tried to gather data over a similar period (2015-2021) for Lysimachos Tetradrachms but limiting it to examples that have sold twice at least 18 months apart, and found a similar increase (usually 2-3X, virtually none sold for less after 2019). I think I found somewhere around 20 or 30. Of course, there are obvious methodological challenges the either approach, but since no one's developed any ideal ways to test price trends for ancients, the best way to address the issue is by triangulating with different kinds of data and seeing if they tend to agree. [COLOR=#808080][B][See EDIT in maroon below] [/B]What I collected wasn't fine grained enough to notice seasonal patterns. But I notice from your plot, just impressionistically, it seems like there's a drop every summer. That would fit the prevailing wisdom. (Of course, it's possible that similar coins with less tangible differences, sell at different times. E.g., Maybe those of the finest style and greatest eye appeal are the ones that get put it in the high-profile January auctions.)[/COLOR] [COLOR=#b30000] [[B]EDIT[/B]: Per clarification below, the data don't reflect seasonal changes. Nonetheless, very useful and glad they were shared!][/COLOR][/QUOTE]
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