Can you point me to an analysis using more advanced tools that concludes that "scalpers" are not welfare promoting? I may have been a bit sloppy talking about

Can you point me to an analysis using more advanced tools that concludes that "scalpers" are not welfare promoting? I may have been a bit sloppy talking about utility interchangeably with willingness-to-pay, but it remains true that someone willing to pay more should get it instead of someone willing to pay less, or else the situation admits a kaldor hicks improvement. (There are weird cases with weird demand curves where this may not be true, which is why I specified "reasonable assumptions".)