Yet some villages have continued for more than 100 years, with individual households moving in or out during this period.
In its original form, it imposed duties on individual households.
Duradanda had a population of 2135 people living in 430 individual households.
At one side is a long communal platform, from which the individual households can be reached.
The energy savings to an individual household would add up to just a few dollars a year.
It has 37,513 individual households and a total area of 258.53 km2.
Settlements with individual households have not been reached, and they will vary.
The study suggested that the impact was down to the "scholarly culture" of individual households.
Population of 260 people living in 52 individual households.
At the time of the 1991 Nepal census, 4217 people were living within 743 individual households.