Quarterly National Accounts. Workshop on National Accounts for Asian Member States of the Organization of Islamic Conference Ankara, 1-2 December 2008 UN Statistics Division. Objectives of presentation. Background on QNA General principles for QNA
Workshop on National Accounts for Asian Member States of the Organization of Islamic Conference
Ankara, 1-2 December 2008
UN Statistics Division
“The importance of quarterly accounts derives essentially from the consideration that they are the only coherent set of indicators, available with a short time-lag, able to provide a short-term overall picture of both non-financial and financial economic activity” (ESA 1995, § 12.02)
Two major approaches:
Purely mathematical methods
- pro-rata distribution
- Bassie method
- proportional Denton technique
- regression models
Avoiding the step problem
The method is as follows:
1. Select a pair of two years for benchmarking.
2. Apply the simple prorating method to the original quarter data of the first year in the pair.
3. Apply the following formula for adjusting the prorated data of the first year and the original data of the second year as follows:
Find the difference between the annual value of the second year and the sum of quarter data:D2 = A2 - Xq,2
Find the new adjusted value of the quarters for year 1 and year 2Zq1 = X q,1 + 0.25 x bq x D2
Zq,2 = X q,2 + 0.25 x cq x D2Subscript 1,2 refer to the first and second year.