Why collect the same data twice: Exploring the possibilities of using VAT data in the estimation of

1
Why collect the same data twice? Exploring
thepossibilities of using VAT data in the
estimation of theDanish IIP

• Søren Kristensen
• Statistics Denmark

2
Is it really the same data?

• Data sources for three turnover indexes and the
  IIP

3
Is it really the same data?
Differences between VAT and IIP what are the
issues?
4
Reasons for using VAT data instead of survey data

• Reduce burden on businesses
• Political focus on reducing burden
• Increase efficiency
• Produce more for less
• We already use VAT data
• Increase quality of the indicator
• Better coverage
• Imputation and grossing up

5
How to use VAT data in the estimation of the IIP
exploring the alternatives
1. Replacement of sample data with VAT 2.
Partial replacement of sample data with VAT
data 3. Use of VAT data for imputation 4. Use
of VAT for grossing up
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Partial replacement of sample data with VAT

• Production index turnover change in
  inventories
• 2 questions
• Is VAT a good replacement for sample turnover?
• How can inventories be measured and combined with
  administrative data?

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VAT as replacement for survey data
Taking account of difference in definitions
subtracting sale of traded goods
8
VAT as replacement for survey data
Taking the difference in units into account
Only 20 large units that really make a difference
gt Reasonably good prospects for the turnover
variable
9
Measuring inventories
- No administrative data available

• Collect data from the sample
• Problem of data consolidation
• Estimate change in inventory at a more aggregate
  level
• Collect data from a smaller sample,

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Three models for using VAT data in the IIP