These researchers found that if you work from home you will be less efficient and productive than people who from their office. Can we say the same about freelance workers? Do you think that if workers are given the chance to "own" a task like freelancers they'll be more productive because it is just like being self-employed where you treat it as your business and not with the mindset of another man's business?
I don't trust that research because I have seen with my own eyes that the ones who work in offices have procrastinated a lot during their working hours and I have also seen the freelancers that have done their best to complete the work within few hours without any delays. I believe that if someone is determined then that user will put a lot of effort to complete his/her work whether he/she is working in a office or working from home as a freelancer.
I know that in some cases the workers who work from home may not be able to work efficiently if their home environment doesn't allow them to be productive, but in most cases the ones who work from home give a lot of time and effort the complete the work in the most efficient way possible. The workers on office are also of same nature, if the working environment of the office is good then the workers will love to focus on the work in the most efficient way, but if the working environment of an office is not good then the workers may not be able to give their best to the work.