Premise: This assumption will also lead us to underpredict benefits since it is likely that increases in real U.S. income would also result in increased cost-of-illness (due, for example, to increases in wages paid to medical workers) and increased cost of work loss days (reflecting that if worker incomes are higher, the losses resulting from reduced worker production would also be higher).
Hypothesis: The assumption will cause under prediction of benefits. 
Label: neutral