Safety standards have also improved which I expect has had a negative impact on productivity. Remember this? https://static01.nyt.com/images/2012/11/11/arts/11

Safety standards have also improved which I expect has had a negative impact on productivity. Remember this? https://static01.nyt.com/images/2012/11/11/arts/11LUNCH1_SPAN/11LUNCH1_SPAN-superJumbo.jpg https://static01.nyt.com/images/2012/11/11/arts/11LUNCH1_SPA...