At the unregulated, competitive equilibrium, the demand curve of gasoline becomes more elastic over time as people can react to a higher gasoline price by buying more fuel-efficient cars, moving closer to work, or making other changes than they cannot make in the short run. Given a binding price ceiling, the gasoline market has a shortage.
As the demand curve becomes less elastic in the long run, what happens to the size of the shortage and the dead-weight loss?