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| [[Effect of sales tax on social surplus]] || forgot "government surplus" in one equation at top, included in later analysis || || [http://market.subwiki.org/w/index.php?title=Effect_of_sales_tax_on_social_surplus&oldid=996 November 30, 2012] || carelessness
| [[Effect of sales tax on market price and quantity traded]] || the justification for the claim that monopologies will never switch to a lower-price, higher-quality equilibrium was incorrect for the revenue-proportional case || [https://market.subwiki.org/w/index.php?title=Effect_of_sales_tax_on_market_price_and_quantity_traded&oldid=1419 September 18, 2016] (series of edits leading up to this) || [https://market.subwiki.org/w/index.php?title=Effect_of_sales_tax_on_market_price_and_quantity_traded&oldid=
1527 March 15, 2017] || The arguments were tricky and I made an error translating intuition to reasoning. The underlying intuition was in my head (and had previously been worked out on paper) but I ignored some of the subtleties when translating it.