In certain countries of the former Soviet Union, apparent mortality trends are distorted by phases of improvement or deterioration in data quality. In Moldova, the quality of infant mortality statistics improved suddenly in the 1970s, but still poses problems to this day. The change in the 1970s...

SUMMARY The 1969-1970 population survey carried out in Algeria shows the advantage repeated passage surveys have over retrospective ones in mortality study. It improves our interpretation of the incomplete data existing since the beginning of the century, as it gives the first exact measurements...