for one time unit (here called mesh size) remains so for another is investigated. The conditions under which the model … does remain valid are established. There are various ways in which the mesh size of a data triangle may be varied, two of …, an increase in mesh size always increases the variance of the loss reserve estimate (subject to mild technical conditions …

is valid for one duration (here called mesh size) remains so for another. The conditions under which this is so are … established. There are various ways in which the mesh size of a data triangle may be varied. The paper identifies two of … technical qualifications, the conclusion is that an increase in mesh size always increases the variance. It follows that one …