Supply and demand both tend to become more elastic in the long run.What does this mean for the deadweight loss and tax revenue from a tax in the long run compared to the short run?

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The Answer of Supply and demand both tend to become more elastic in the long run.What does this mean for the deadweight loss and tax revenue from a tax in the long run compared to the short run?

Supply and Demand Both Tend to Become More Elastic in the Long