Administrative Data and their Use in Economic Statistics
- Slides: 27
Administrative Data and their Use in Economic Statistics Vladimir Markhonko United Nations Statistics Division Vladimir Markhonko 12/7/2007
Contents Ø Definitions Ø Advantages of using administrative data Ø Common problems Ø Quality of administrative data Ø Using administrative data in practice Ø Conclusions Vladimir Markhonko 12/7/2007
Narrow Definition Vladimir Markhonko 12/7/2007
Wider Definition Vladimir Markhonko 12/7/2007
Administrative sources are sources containing information which is not primarily collected for statistical purposes. Vladimir Markhonko 12/7/2007
Reasons for this Definition Ø Privatisation of some government functions Ø Growth of private sector “value-added re-sellers” Ø User interest in new types of data Vladimir Markhonko 12/7/2007
Benefits of Administrative Data Ø Cost l Surveys / censuses are expensive, administrative data are often “free” Ø Response burden Reduced burden on data suppliers l Statistics can be compiled more frequently with no extra burden l Vladimir Markhonko 12/7/2007
Benefits of Administrative Data Ø Coverage Full coverage of target population l No survey errors and lower non-response l Better small-area data l Ø Timeliness (sometimes!) Ø Public image l Making use of existing data can enhance the prestige of a statistical organisation by making it seem more efficient Vladimir Markhonko 12/7/2007
Population Census Costs 2000 -2001 Ø UK, € 367 m, € 6. 2 person Ø Austria, € 56 m, € 6. 9 person Ø Finland, € 0. 8 m, € 0. 2 person Source: Eurostat – Documentation of the 2000 round of population and Housing censuses in the EU, EFTA and Candidate Countries; Table 22 Vladimir Markhonko 12/7/2007
Common Problems Ø Administrative units do not always coincide with statistical units Ø Conversion via automatic rules for simple cases Ø Profiling for more complex cases Gives a better understanding of complex business structures l Expensive and needs trained staff l Vladimir Markhonko 12/7/2007
Vladimir Markhonko 12/7/2007
Common Problems Ø Different definitions and classifications Administrative and statistical priorities are often different l Conversion matrices needed for different classifications l Ø Timeliness Data arrive too late l Data relate to a different time period l Vladimir Markhonko 12/7/2007
VAT Birth Lags Vladimir Markhonko 12/7/2007
VAT Birth Lags Ø 2/3 of businesses are on the register within 2 months of start-up Ø Mean lag = 4 months due to “outliers” Ø Median = Approx. 40 days Ø Some pre-register - negative lags Vladimir Markhonko 12/7/2007
Common Problems Ø Change management Risk of changes in government policy, thresholds, definitions, coverage etc. l Need contingency plans l Ø Data from multiple sources Matching / linking issues l Data conflicts – priority rules l Vladimir Markhonko 12/7/2007
Quality of Administrative Data Ø There are many aspects to quality Ø Administrative data will be better than survey data in some aspects but not in others Ø It is important to look at overall quality Ø Do the data meet the needs of users? Vladimir Markhonko 12/7/2007
Three Aspects of Quality Ø Quality of incoming data Ø Quality of processing (matching, merging, . . . ) Ø Quality of outputs - likely to be different to survey based outputs, but are they better? Vladimir Markhonko 12/7/2007
Quality Measurement Ø How to measure the quality of data from administrative sources? Comparing sources l Quality check surveys l Knowledge of source (metadata) l Quality reports / templates l Vladimir Markhonko 12/7/2007
Quality Templates Vladimir Markhonko 12/7/2007
Using Administrative Data Ø Conversion to statistical concepts and definitions Ø Linking / Matching – – Exact Matching - linking records from two or more sources, often using common identifiers Probabilistic Matching - determining the probability that records from different sources should match, using a combination. Vladimir of variables Markhonko 12/7/2007
UK Business Register Vladimir Markhonko 12/7/2007
Vladimir Markhonko 12/7/2007
Satellite Registers Vladimir Markhonko 12/7/2007
Examples of Satellite Registers Ø Tourism - hotel register (category, number of beds) Ø Transport - vehicle or ship register (type, capacity) Ø Distributive trades - buildings register (building size, sales area) Vladimir Markhonko 12/7/2007
Conclusions Ø Administrative sources should be defined in the widest sense Ø There are many benefits in using administrative data, particularly reduced costs Ø There are problems when using administrative data, but usually someone has found a solution Vladimir Markhonko 12/7/2007
Conclusions Ø Most problems can be reduced by effective planning and detailed knowledge of the source Ø The benefits are often greater than the costs Vladimir Markhonko 12/7/2007
Thank you for your attention. Vladimir Markhonko 12/7/2007
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