You keep throwing out this 13% as if it is a bad thing, with no comment on the context mentioned in your link. So I&#x27;ll add it here for others to view if they don&#x27;t want to wade through a pdf to find it:<p>1: The 13% decrease in work effort is per <i>family</i> unit. This is an important distinction, because it led to the following 3 points<p>2: The primary wage earner in the unit reduced their effort only slightly, but this had a large result due to them making the majority of the cash<p>3: The secondary wage earner, who was usually the spouse reduced their work effort to stay at home longer after having a baby, and to do more work around the house.<p>4: The tertiary wage earner, in most cases an adolescent male, had theIr work effort reduced by the fact that it entered the workforce later. This may have been due to them continuing their education.<p>So I think - IMHO - the 13% reduction represent a net benefit for society - dad doesn&#x27;t have to do so much overtime, mum can spend more time with her baby, and your kids stay in school longer and become qualified for better jobs...