Benchmarking & Backcasting GDP of Indonesia Base Year 2010

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Presentation transcript:

Benchmarking & Backcasting GDP of Indonesia Base Year 2010

What is Benchmarking ? Benchmarking is a technique to combine data from two sources with different time frequency : for example data with monthly/quarterly frequency, which believe to be less accurate, on the other hand data with annual frequency is believed to be more complete and accurate; therefore annual data usually used as benchmark for monthly/quarterly data. The main purpose of benchmarking is to distribute the diffence between two series of data so that trend of final series is closely similar with the actual/original series.

Method of Benchmarking Mostly known benchmarking method is Proportional Denton Method which maximize pertain short-term movements of monthly/quarterly data, and produce benchmark series as close as the actual. It is done by minimizing the difference (in “least squares”) month to month (or quarter to quarter) percentage change of the original benchmark series. There is a computer program called BENCH made by Statistics Canada to compute benchmarking process.

Exercise 1 : Benchmarking Annual and Quarterly GDP Annual GDP Bench 2000 & 2005 Quarterly GDP Bench 2000 & 2005 Quarterly GDP old series, 2000=100 Annual GDP old series, 2000=100

Annual Current Price GDP 2000 - 2010 (Billion Rp)

Quarterly Current Price GDP 2000 - 2010 (Billion Rp)

Annual GDP by Industries 2000 - 2010 (Billion Rp)

Quarterly GDP by Industries 2000 - 2010 (Billion Rp)

Exercise 2 : Backcasting 2010 Constant Price GDP Constant GDP Series 2010=100 Bench 2000 & 2005 Quarterly Constant GDP, Series 2010=100 Growth of Constant GDP, Series 2000=100 (%) Quarterly Constant GDP, Series 2000=100

Annual Growth of Constant GDP 2001 – 2010 (%) Agriculture Food Crops Total GDP

Quarterly Growth of Constant GDP, QtoQ, 2001 – 2010 (%) Food Crops Agriculture Total GDP

Quarterly Growth of Constant GDP, YonY, 2001 – 2010 (%) Food Crops Agriculture Total GDP

Annual Growth of Constant GDP by Industries 2001 – 2010 (%)

Quarterly Growth of Constant GDP QtoQ 2001 – 2010 (%)

Quarterly Growth of Constant GDP YonY 2001 – 2010 (%)

Exercise 3 : Implicit price deflator of 2010 Constant Price GDP Seri 2010 Current GDP Seri 2010 Bench 2000 & 2005 Implicit Index of GDP Seri 2010 Bench 2000 & 2005 Constant GDP Seri 2010 Bench 2000 & 2005

Annual Implicit Growth 2001 – 2010 (%)

Quarterly Implicit Growth (%)

Annual Implicit Growth by industries (%)

Quarterly Implicit Growth by industries 2001 – 2010 (%)

Need to establish a clearer way forward Where next ? Need to establish a clearer way forward Thank you