1. New ways to get the data Multiple mode and big data
Working Group Time Use Survey
Luxembourg, 11 Nov 2014

2. New ways to get the data Designed by you Not designed by you
Web questionnaires and mobile apps
Multiple mode data collection
Not designed by you
Big data sources
Mobile phone sensors
Crowdsourcing
Other complementary sources

3. ESSnet "Data collection for Social surveys"
Initiated by Eurostat to support NSIs in:
Developing web data collection tools
Implementing and assessing the impacts of mixed mode data
Labour Force Survey (LFS) chosen as a concrete example
Duration of the project: autumn 2012 – 2014
Consortium:
Partners (5): FI, NO, NL, UK, DE (coordinator)
Support-group-members (3): SE, DK, IT
External consultants

4. ESSnet "Data collection for Social surveys"
Some results concerning web questionnaires
Implementation of web questionnaires is possible.
Obstacles
Length and Household approach is demanding
Some questions are critical & need further testing
Switch from interviewer administered to self-completion crucial
Basic design:
Paging design & navigation: Backward/forward button
Error checks: Feasible, plausibility checks demanding
Don’t know options useful
Grids: applicable, but only simple
CAWI design: is different from CATI and CAPI

5. ESSnet "Data collection for Social surveys"
Some results concerning multi-mode
Mixed mode designs
Mixed mode already used a lot, but not including web
Many different mixed mode designs across ESS
Design depends on purpose (quality / costs), and survey organisation
Case management systems & IT are crucial for successful implementation
Mode effects are present, but may not be problematic in LFS
More work necessary on adjustment

6. Scheveningen Memorandum on Big Data
Examine the potential of Big Data sources for official statistics
Official Statistics Big Data strategy as part of wider government strategy
Address privacy and data protection
Collaboration at European and global level
Address need for skills
Partnerships between different stakeholders (government, academics, private sector)
Developments in Methodology, quality assessment and IT
Adopt action plan and roadmap for the ESS
At their meeting in September 2013, the directors general of the European Statistical System agreed on a memorandum on Big Data. The so called Scheveningen memorandum called for the submission of the action plan and roadmap on Big Data. It also expresses the main points of such an action plan, such as the integration of a Big Data strategy for statistics into an overall government strategy, the need for skills, the collaboration at European as well as at global level, the need for methodological developments and the protection of personal data.
The action plan and roadmap was adopted by the ESS at its meeting on 25 Sep 2014.

7. Sources of Big Data for Pilots
Communication
Mobile phone data
Social Media
WWW
Web Searches
Businesses' Websites
E-commerce websites
Job advertisements
Real estate websites
Sensors
Traffic loops
Smart meters
Vessel Identification
Satellite Images
Process generated data
Flight Booking transactions
Supermarket Cashier Data
Financial transactions
Crowd sourcing
VGI websites (OpenStreetMap)
Community pictures collection
The key critical success factor in the action plan is an agreement at ESS level to embark on a number of concrete pilot projects. A real understanding of the implications of big data for official statistics can only be gained through hands-on experience, ‘learning by doing’. Different actors have already gained experience conducting pilots in their respective organisations at global, European and at national level.
The basic principle for the identification of the pilots should be their potential for producing official statistics. In addition, the pilots should cover a variety of characteristics related to big data and production of statistics.
On the basis of the principles described in the action plan and roadmap, the he ESS Big Data ask Force should make proposals for pilots which would have to be agreed by the ESSC. Participation in the pilots will be guided by the collaboration principles of the ESS Vision on a case-by-case approach.

8. Thank you for your attention Eurostat Task Force on Big Data
Fernando Reis
Eurostat Task Force on Big Data