Lack of sleep is costing the economy more than $66 billionOne in four Australians are taking one day off a month because they're too tired, researchers say. (AAP) Source: AAP1 min readPublished 8 August 2017 4:24pmUpdated 8 August 2017 4:45pmBy Winmas YuSource: Fairfax Media, ABCAvailable in other languagesSkip to article contentShare this with family and friendsCopy linkShareThis story is written in Chinese.Share