When we first started research on telecommuting in 1973 our focus was on whether telecommuting was practical in the real world, never mind the optimal amount of telecommuting. I insisted that the research involved testing telecommuting in an actual company, one whose bottom line was purely business oriented. The question of the optimal amount of telecommuting/teleworking didn’t come up because we were concerned with whether it was practical at all.
In those days the typical telecommuter was a person who worked using a computer terminal that was connected by wires to a mainframe computer somewhere. The idea of the person doing this from home was simply not practical; telecommunications cost — the cost of connecting that computer terminal to a distant mainframe via telephone connections all day — was simply too high. So in those mid-1970s days we concentrated on people working in what we called satellite offices: typically suburban offices solely owned by the employing company for use by its employees. Only after the arrival of personal computers in the late 1970s and early 1980s was it practical to think about home based telecommuting.