1. Sampling Frames for Establishment Surveys International Workshop on Industrial Statistics Beijing, China, 8-10 July 2013

2. Sampling frame for establishment surveys List frame of establishments or business register generally used for Economic Surveys List frame of establishments or business register generally used for Economic Surveys List frame can be used for identifying larger establishments to be included in the sample with certaintyList frame can be used for identifying larger establishments to be included in the sample with certainty Business register has information on economic activity and size (such as number of employees) that can be used for stratificationBusiness register has information on economic activity and size (such as number of employees) that can be used for stratification

3. Sampling frame (continued) In some countries sampling frame of establishments based on Economic Census In some countries sampling frame of establishments based on Economic Census Business register developed from different sources Business register developed from different sources Important to update sampling frame over time to reflect births and deaths of establishments Important to update sampling frame over time to reflect births and deaths of establishments

4. Data sources for business register Economic Census Economic Census Registration of establishments from Ministry of Industry and Trade or other government agency Registration of establishments from Ministry of Industry and Trade or other government agency Database from tax system Database from tax system Chambers of Industry and Commerce Chambers of Industry and Commerce Professional associations Professional associations Commercial directories Commercial directories

5. Single and multiple frames Business register (list frame of establishments) important for identifying large companies to be included in the survey with certainty, and medium-size companies to be included with higher probability Business register (list frame of establishments) important for identifying large companies to be included in the survey with certainty, and medium-size companies to be included with higher probability Sometimes area frame is also used to cover smaller establishments, informal sector and other establishments missing from business register Sometimes area frame is also used to cover smaller establishments, informal sector and other establishments missing from business register

6. Enterprises and establishments Ideal for business register to link enterprises and establishments within enterprise Ideal for business register to link enterprises and establishments within enterprise Some economic data can be collected at enterprise level Some economic data can be collected at enterprise level Depends on how accounting records are maintained by company Depends on how accounting records are maintained by company

7. Area sampling frame In some countries area sampling frame is used to complement the business register In some countries area sampling frame is used to complement the business register Used for representing new birth establishments and other establishments missing from business register Used for representing new birth establishments and other establishments missing from business register Cluster sample less costly for covering small establishments when personal interviews are used Cluster sample less costly for covering small establishments when personal interviews are used

8. Area frame (continued) Sample areas selected with probability proportional to size (PPS), where the measure of size is based on number of establishments, employees or another measure such as revenue Sample areas selected with probability proportional to size (PPS), where the measure of size is based on number of establishments, employees or another measure such as revenue Listing of establishments in sample areas, match to list frame to eliminate duplication Listing of establishments in sample areas, match to list frame to eliminate duplication

9. Multi-stage sampling for establishment surveys Even with a list frame, some countries use multi-stage sampling to reduce cost of data collection Even with a list frame, some countries use multi-stage sampling to reduce cost of data collection When data collection is based on personal interviews, it is costly to visit establishments dispersed throughout the country When data collection is based on personal interviews, it is costly to visit establishments dispersed throughout the country In some cases the large cities are self- representing (included in the sample with certainty), but a sample of smaller towns is selected at the first stage In some cases the large cities are self- representing (included in the sample with certainty), but a sample of smaller towns is selected at the first stage

10. Multi-stage sampling (continued) Establishments are selected at the second stage, stratified by ISIC groups and number of employees Establishments are selected at the second stage, stratified by ISIC groups and number of employees It is still important to identify the largest establishments in the list frame, which may be interviewed regardless of their location It is still important to identify the largest establishments in the list frame, which may be interviewed regardless of their location Such large establishments removed from area frame to avoid duplication in the framesSuch large establishments removed from area frame to avoid duplication in the frames

11. Setting up business register Business register is first based on most comprehensive list of current establishments from business registration, license database, tax database, or Economic Census Business register is first based on most comprehensive list of current establishments from business registration, license database, tax database, or Economic Census Lists of establishments from different sources should be matched to add missing establishments and remove duplication Lists of establishments from different sources should be matched to add missing establishments and remove duplication

12. Information in business register Name, address, contact information (telephone, fax, e-mail) Name, address, contact information (telephone, fax, e-mail) Unique identification code Unique identification code Economic activity, with ISIC code Economic activity, with ISIC code Number of employees Number of employees Other measures of size (capital, annual value of production/sales, value added) Other measures of size (capital, annual value of production/sales, value added)

13. Unique identification codes Ideal to coordinate with agencies involved with business registration or licensing to use consistent identification Ideal to coordinate with agencies involved with business registration or licensing to use consistent identification Tax identification number may be considered Tax identification number may be considered Code of enterprise and establishment can be linked Code of enterprise and establishment can be linked

14. Updating business register In order to represent current establishments, important to develop procedures for continuous updating of the business register from different sources In order to represent current establishments, important to develop procedures for continuous updating of the business register from different sources Adding new (birth) establishments Adding new (birth) establishments Removing closed (death) establishments Removing closed (death) establishments

15. Updating business register (continued) Develop relationship with government agencies responsible for business registration, licenses or taxes to share information on new and closed establishments on a regular basis Develop relationship with government agencies responsible for business registration, licenses or taxes to share information on new and closed establishments on a regular basis Ideal for agencies to use common unique identification for establishments Ideal for agencies to use common unique identification for establishments