When I started to watch British comedies several years back, I quickly observed that most series were only 6 episodes long. In some cases there are 8 episodes. Most American sitcoms run 20 to 22 episodes per season.
The first season of Green Acres was 32 episodes, and it ran for 6 years. Red Dwarf on the other hand produced 52 episodes in total over 8 series.
Why are most British series only 6 or 8 episodes long?
One possible explaination I've found is that British shows tend to only have one or two writers, while an American shows often employees a team.
Sorry of this has been asked previously.