I don't know if you are correct in a 'global productivity sense'. I do know that it's quite common for me to get more 'real work' done on the train on the 30 mi

I don't know if you are correct in a 'global productivity sense'. I do know that it's quite common for me to get more 'real work' done on the train on the 30 minute journey to work than in the rest of the day.