Autor & Dorn (2013), Figure 1.A. Panel A. Smoothed changes in employment by skill percontilo, 1980-2005 04- 03- 02 100 x change in employment share 01- 20 100 Skill percentile (ranked by 1980 occupational mean wage) b. [20 marks] In light of the trend highlighted in the graph above, economists have started to discuss what the overall effect of automation on labour demand is. Briefly explain how the concepts of displacement effects and reinstatement effects shed light on this debate