I've been posting the Economist link in several comments. I left it as presented to show where the link came from in case people argued with the source.

This source just states that there is a disagreement over whether work from home is more or less productive and provides survey information to show the difference in opinion.

That isn't making the argument that remote work is productive, just that workers view it as more productive and the study isn't conclusive. The closest this study gets to saying if productivity increases is "In theory, both sides could be right[.]"