 In addition, employers may use time spent in unemployment as a screening tool, i.e., to weed out less desired employees in hiring decisions.Then, in times of an economic upturn, recovery, or "boom", the affected workers will not share in the prosperity, remaining unemployed for long periods (e.g., over 52 weeks).This makes unemployment "structural", i.e., extremely difficult to reduce simply by increasing the aggregate demand for products and labor without causing increased inflation.