From Science News
_ comes an article that tries to relate a country's development efficiency to the size of its cabinet, and gives an explanation using network theory and a particular model for arriving at a decision. I suspect there are several devils in the details of how well their model corresponds to actual working committees, and a cabinet does not correspond to my concept of a committee anyway, given that the usual organization of a cabinet is to give each member a particular responsibility.
Nonetheless, the article is interesting. For their model, it turns out that 10 or under is workable - except 8. Apparently, one should not create a committee of 8 members.
Legislatures seem to run much larger. Maybe this is why they are primarily good for burning up money and accomplishing little.