However, when we analyze the per-household volume figures, we have to remember that, for the purpose of developing those figures, we made the aforementioned assumption about the relationship of mail volume and number of households and this assumption may not hold true for some or all sectors (or uses) and for some or all years in Tables 1, 2 and 3.
The assumption may not hold true for some or all sectors.
Because of the importance of this endpoint and the considerable uncertainty among economists and policymakers as to the appropriate way to value reductions in mortality risks, this section discusses some of the issues surrounding the estimation of premature mortality.