English to Greek Bus/Financial Economics Βιβλίο μακροοικονομικής

How does chain weighting lead to a different measurement of real GDP than the methods used by the BEA prior to 1996? What are the advantages of chain weighting? What are the disadvantages?
Answer: Prior to 1996, the growth rate of real GDP depended on which year was chosen as the base year. Now, however, the current year and preceding year are used as base years, averaging results using each as base year. The advantages of this method are that there is no longer a need to recompute historical data or to change base years. However, a disadvantage is that real GDP is no longer the sum of its components.

Όπου GDP = ακαθάριστο εγχώριο προϊόν, όπου ΒΕΑ = γραφείο οικονομικής ανάλυσης Η.Π.Α.

Εϊναι ερωτήσεις ανάπτυξης και multiple choice.

Thanks in advance!