The authors offer a broad view of the National Statistical System, emphasizing the desired improvement in capacities and performance, and outlining the major provocations the system is subjected to. Topics as priorities, legal framework adaptation, international cooperation, internal...

By specific methods, statistics studies including the tendency of development, designed by the specific literature as the trend and, meantime, by trying to separate the influence of the major factors (with a systematic action), from the influence of the casual factors, which involve deviations...