Country: Poland

Year: 2021

Title: Wskaźniki społeczeństwa informacyjnego (Information Society Indicators)

Organisation running the survey: Statistics Poland (GUS)

Survey period: 19.04.2021 - 26.07.2021

Sampling and statistical methodology:

Last update of the business register: December 2020. Sample was drawn in March 2021.

Frame population is in some extent coordinated with SBS Annual Survey (SP). Some of enterprises participate in both surveys. One frame is used during different stages of the statistical process.

Stratification:

The sample size fluctuates around 18.4% of the population of N units, which, based on the results from previous years, ensured adequate precision of the results in the assumed breakdowns. The variables used for stratification are: the economy activity (NACE rev2, 25 categories, RD variable) and size of enterprise (as number of persons employed, 3 categories, WLK variable). All large enterprises (with more than 249 employees) and all entities from WLK * RD stratas, whose N is less than 200, are included in the sample. The rest of the sample is allocated in WON * NTS1 * WLK * RD stratas (WON and NTS1 are territory codes to ensure that enterprises from all country will be choosen) by solving the following formula : nh = 0.6 * (allocation proportional to the size of the strata) + 0.4 * (allocation to square root of the number of elements in given strata). The use of such a method of sample allocation gives a slight over-representation of the smallest stratas at the expense of the larger ones - it has been used to improve precision - especially in small breakdowns

Reference period: Reference period of national survey is consistent with Model Questionnaire.

Collection method:

Mandatory, stand-alone survey.

The survey will be carried out using the self-reporting method using the electronic form as the primary one, available on the Statistical Reporting Portal. Enterprises which don't have access to Statistical Reporting Portal have possibility to submit paper form. In singular cases respondents who have difficulties to answer questions, have possibility to fulfill obligation via telephone interview with Statistican.

Population covered:

NACE Rev. 2 sections C, D, E, F, G, H, I, J, L, M and N, division 95.1.

Enterprises with 10 or more persons employed

The whole territory was covered.

Population size: 106.951 enterprises

Sample size: 19.787 enterprises

Overall response rate: 66%

Main methodological differences compared to previous survey(s):

NACE Rev. 2 division 75 covered

Country: Poland

Year: 2020

Title: Wskaźniki społeczeństwa informacyjnego (Information Society Indicators)

Organisation running the survey: Statistics Poland (GUS)

Survey period: 15.04.2020 - 27.07.2020

Sampling and statistical methodology:

Last update of the business register: December 2019. Sample was drawn in march 2020

Frame population is in some extent coordinated with SBS Annual Survey (SP). Some of enterprises participate in both surveys. One frame is used 

Stratification:

The sample size fluctuates around 18.4% of the population of N units, which, based on the results from previous years, ensured adequate precision of the results in the assumed breakdowns. The variables used for stratification are: the economy activity (NACE rev2, 25 categories, RD variable) and size of enterprise (as number of persons employed, 3 categories, WLK variable). All large enterprises (with more than 249 employees) and all entities from WLK * RD stratas, whose N is less than 200, are included in the sample. The rest of the sample is allocated in WON * NTS1 * WLK * RD stratas (WON and NTS1 are territory codes to ensure that enterprises from all country will be choosen) by solving the following formula : nh = 0.6 * (allocation proportional to the size of the strata) + 0.4 * (allocation to square root of the number of elements in given strata). The use of such a method of sample allocation gives a slight over-representation of the smallest stratas at the expense of the larger ones - it has been used to improve precision - especially in small breakdowns.

Reference period: Reference period of national survey is consistent with Model Questionnaire.

Collection method:

Mandatory, stand-alone survey.

The survey will be carried out using the self-reporting method using the electronic form as the primary one, available on the Statistical Reporting Portal. Enterprises which don't have access to Statistical Reporting Portal have possibility to submit paper form. In singular cases respondents who have difficulties to answer questions, have possibility to fulfill obligation via telephone interview with Statistican.

Population covered:

These activities are: NACE Rev. 2 sections C, D, E, F, G, H, I, J, L and N, divisions 69-74, groups 65.1, 65.2 and 95.1 and classes 64.19, 94.92, 66.12 and 66.19.

Enterprises with 10 or more persons employed

The whole territory was covered.

Population size: 109.168 enterprises

Sample size: 19.948 enterprises

Overall response rate: 67%

Main methodological differences compared to previous survey(s):

None

Country: Poland

Year: 2019

Title: Information Society Indicators

Organisation running the survey: Central Statistical Office of Poland

Survey period: Questionnaires sent out:

General: 15^th April  – 26th July 2019

Sampling and statistical methodology:

Frame was constructed following Eurostat's recommendation. The source of the frame was BJS –Polish register of statistical units- and it corresponded to the snapshot taken on the end of December 2018; sample drawn in March 2019.

ICT population is adjusted to one of the SBS financial surveys (SP) and covers following characteristics of the enterprise: legal organisation, form of financing, legal form, activity (only partly; ICT is driven only from active enterprises whilst SBS survey covers also non active enterprises such as during liquidation procedure, with announced bankruptcy etc). One population frame has been used during different stages of the statistical process.

Stratification:

The sample size fluctuates around 18.4% of the population of N units, which, based on the results from previous years, ensured adequate precision of the results in the assumed breakdowns. The variables used for stratification are: the economy activity (NACE rev2, 25 categories, RD variable) and size of enterprise (as number of persons employed, 3 categories, WLK variable). All large enterprises (with more than 249 employees) and all entities from WLK * RD stratas, whose N is less than 200, are included in the sample. The rest of the sample is allocated in WON * NTS1 * WLK * RD stratas (WON and NTS1 are territory codes to ensure that enterprises from all country will be choosen) by solving the following formula : nh = 0.6 * (allocation proportional to the size of the strata) + 0.4 * (allocation to square root of the number of elements in given strata). The use of such a method of sample allocation gives a slight over-representation of the smallest stratas at the expense of the larger ones - it has been used to improve precision - especially in small breakdowns.

Reference period: following model questionnaire

Collection method:

Mandatory, stand-alone survey. Electronic questionnaire via statistical on-line portal with possibility of paper form.

Population covered:

These activities are: NACE Rev. 2 sections C, D, E, F, G, H, I, J, L and N, divisions 69-74, groups 65.1, 65.2 and 95.1 and classes 64.19, 94.92, 66.12 and 66.19.

Enterprises with 10 or more persons employed

The whole territory was covered.

Population size: 106.729 enterprises

Sample size: 19.673 enterprises

Overall response rate: 72%

Main methodological differences compared to previous survey(s):

None

Country: Poland

Year: 2018

Title: Information Society Indicators

Organisation running the survey: Central Statistical Office of Poland

Survey period: Questionnaires sent out:

General: 20^th April  – 27^th July 2018

Sampling and statistical methodology:

Frame was constructed following Eurostat's recommendation. The source of the frame was BJS –Polish register of statistical units- and it corresponded to the snapshot taken on the end of December 2017; sample drawn in March 2018.

ICT population is adjusted to one of the SBS financial surveys (SP) and covers following characteristics of the enterprise: legal organisation, form of financing, legal form, activity (only partly; ICT is driven only from active enterprises whilst SBS survey covers also non active enterprises such as during liquidation procedure, with announced bankruptcy etc). One population frame has been used during different stages of the statistical process.

Stratification:

Stratified random sample was used. The variables for stratification were the economy activity (NACE rev2, 25 categories) and size of enterprise (as number of employed persons, 3 categories).

All large enterprises (having more than 249 employees) were included into sample. Also strata in the frame contained small number of units (less than 200) were integrally included into the sample. The calculation of sample size was based on precision requirements and was equal to 19.139 units (approx.18,2 % of  frame population). No coordination with other survey samples was done.

Reference period: following model questionnaire

Collection method:

Mandatory, stand-alone survey. Electronic questionnaire via statistical on-line portal with possibility of paper form.

Population covered:

These activities are: NACE Rev. 2 sections C, D, E, F, G, H, I, J, L and N, divisions 69-74, groups 65.1, 65.2 and 95.1 and classes 64.19, 94.92, 66.12 and 66.19.

Enterprises with 10 or more persons employed

The whole territory was covered.

Population size: 104.111 enterprises

Sample size: 19.139 enterprises

Overall response rate: 73%

Main methodological differences compared to previous survey(s):

None

Country: Poland

Year: 2017

Title: Information Society Indicators

Organisation running the survey: Central Statistical Office of Poland

Survey period: Questionnaires sent out:

General: 20^th April  – 4^th August 2017

Sampling and statistical methodology:

Frame was constructed following Eurostat's recommendation. The source of the frame was BJS –Polish register of statistical units- and it corresponded to the snapshot taken on the end of December 2016; sample drawn in March 2017

ICT population is adjusted to one of the SBS financial surveys (SP) and covers following characteristics of the enterprise: legal organisation, form of financing, legal form, activity (only partly; ICT is driven only from active enterprises whilst SBS survey covers also non active enterprises such as during liquidation procedure, with announced bankruptcy etc).

Stratification:

Stratified random sample was used. The variables for stratification were the economy activity (NACE rev2) and size of enterprise (as number of employed persons, 3 categories).

All large enterprises (having more than 249 employees) were included into sample. Also stratas in the frame contained small number of units (less than 200) were integrally included into the sample. The calculation of sample size was based on precision requirements and was equal to 19.144 units (approx.18,2 % of  frame population). No coordination with other survey samples was done.

Reference period: following model questionnaire

Collection method:

Mandatory, stand alone survey. Electronic questionnaire via statistical on-line portal with possibility of paper form.

Population covered:

These activities are: NACE Rev. 2 sections C, D, E, F, G, H, I, J, L and N, divisions 69-74, groups 65.1, 65.2 and 95.1 and classes 64.19, 94.92, 66.12 and 66.19.

Enterprises with 10 or more persons employed

The whole territory was covered.

Population size: 104.183 enterprises

Sample size: 19.144 enterprises

Overall response rate: 73.8%

Main methodological differences compared to previous survey(s):

See also Summary methodology 4. – Footnotes

Country: Poland

Year: 2016

Title: Information Society Indicators

Organisation running the survey: Central Statistical Office of Poland

Survey period: Questionnaires sent out:

General: 18^th April  – 4^th August 2016

Sampling and statistical methodology:

Frame was constructed following Eurostat's recommendation. The source of the frame was BJS –Polish register of statistical units- and it corresponded to the snapshot taken on the end of December 2015; sample drawn in March 2016

ICT population is adjusted to one of the SBS financial surveys (SP) and covers following characteristics of the enterprise: legal organisation, form of financing, legal form, activity (only partly; ICT is driven only from active enterprises whilst SBS survey covers also non active enterprises such as during liquidation procedure, with announced bankruptcy etc).

Stratification:

Stratified random sample was used. The variables for stratification were the economy activity (NACE rev2, 25 categories) and size of enterprise (as number of employed persons, 3 categories).

All large enterprises (having more than 249 employees) were included into sample. Also stratas in the frame contained small number of units (less than 200) were integrally included into the sample. The calculation of sample size was based on precision requirements and was equal to 17688 units (approx.18,2 % of  frame population). No coordination with other survey samples was done.

Reference period: following model questionnaire

Collection method:

Mandatory, stand alone survey. Electronic questionnaire via statistical on-line portal with possibility of paper form.

Population covered:

These activities are: NACE Rev. 2 sections C, D, E, F, G, H, I, J, L and N, divisions 69-74, groups 65.1, 65.2 and 95.1 and classes 64.19, 94.92, 66.12 and 66.19.

Enterprises with 10 or more persons employed

The whole territory was covered.

Population size: 96.599 enterprises

Sample size: 17.688 enterprises

Overall response rate: 74%

Main methodological differences compared to previous survey(s):

See also Summary methodology 4. – Footnotes

Country: Poland

Year: 2015

Title: Information Society Indicators

Organisation running the survey: Central Statistical Office of Poland

Survey period: Questionnaires sent out:

General: 17^th April  – 25^th May 2015

Financial: 17^th April – 22^th May 2015

Sampling and statistical methodology:

Frame was constructed following Eurostat's recommendation. The source of the frame was BJS –Polish register of statistical units- and it corresponded to the snapshot taken on the end of December 2014; sample drawn in March 2015

ICT population is adjusted to one of the SBS financial surveys (SP) and covers following characteristics of the enterprise: legal organisation, form of financing, legal form, activity (only partly; ICT is driven only from active enterprises whilst SBS survey covers also non active enterprises such as during liquidation procedure, with announced bankruptcy etc).

There is no coordination with SBS sample.

Stratification:

Stratified random sample was used. The variables for stratification were the economy activity (NACE rev2, 25 categories) and size of enterprise (as number of employed persons, 3 categories).

All large enterprises (having more than 249 employees) were included into sample. Also stratas in the frame contained small number of units were integrally included into the sample. The calculation of sample size was based on precision requirements and was equal to 18809 units. No coordination with other survey samples was done.

Reference period: following model questionnaire

Collection method:

Mandatory, stand alone survey. Electronic questionnaire via statistical on-line portal with possibility of paper form.

Population covered:

These activities are: NACE Rev. 2 sections C, D, E, F, G, H, I, J, L and N, divisions 69-74, groups 65.1, 65.2 and 95.1 and classes 64.19, 94.92, 66.12 and 66.19.

Enterprises with 10 or more persons employed

The whole territory was covered.

Population size: 102.560 enterprises

Sample size: 18.809 enterprises

Overall response rate: 75%

Main methodological differences compared to previous survey(s):

See also Summary methodology 4. – Footnotes

Country: Poland

Year: 2011

Title: Information Society Indicators

Organisation running the survey: Central Statistical Office of Poland

Survey period: Questionnaires sent out:

General: 15-29.4. – 26.5.2011

Financial: 15-29.4. – 22.5.2011

Sampling and statistical methodology:

Frame was constructed following Eurostat  recommendations. The source of the frame was BJS –our register of statistical units corresponding to the snapshot taken on the end of December 2010.

Full-scale survey for financial sector.

Only codes for active enterprises which had turnover, purchases and persons employed during a period were used.

Stratification: General sampling scheme was proportional stratified sampling design - 25*3 strata (NACE rev2).  However there were several exceptions. Firstly all large enterprises (3049 units), that is having more than 249 employees, were included into the sample. Secondly all units from the last year sample that existed in 2009 and were not present in 2008 year sample were included into the sample.  There were 6456  such units. Thirdly due to non uniform distribution of units between different strata in the frame, some strata that contained small number of units were also included into the sample. There were 3540 such units. The remaining 6718 were allocated proportionally as mentioned above after removing from the frame units that were  taken to the sample now and in 2008.

Reference period: following model questionnaire

Collection method:

Mandatory, stand alone survey. Electronic questionnaire via statistical on-line portal. Supported by off-line form version.

Population covered:

These activities are: NACE Rev. 2 sections C, D, E, F, G, H, I, J, L and N, divisions 69-74, groups 65.1, 65.2 and 95.1 and classes 64.19, 94.92, 66.12 and 66.19.

Enterprises with 10 or more persons employed

The whole territory was covered.

Population size: 93.898 enterprises

Sample size: 17.931 enterprises

Overall response rate: 75.4%

Main methodological differences compared to previous survey(s):

Sample size for non-financial survey increased from 15 459 units in 2010 to 16 714 in 2011 number of which gives 18% of a frame (same level as in 2010).

See also Summary methodology 4. – Footnotes

Country: Poland

Year: 2010

Title: Information Society Indicators

Organisation running the survey: Central Statistical Office of Poland

Survey period: Questionnaires sent out:

General: 15-28.4. – 28.5.2010

Financial: 15-28.4. – 21.5.2010

Sampling and statistical methodology/ 

Stratification: For financial sector frame is the same as a sample ( full-scale survey ).

The source of the frame was BJS –our register of statistical units and it corresponded to the snapshot taken on the end of December 2009.

For ICT we have used only codes for active enterprises: 11,12,13,14 ( acting enterprises, enterprises under organization, enterprises in liquidation, enterprises declaring insolvent ) which had turnover, purchases and persons employed during a period we were interested  in. General sampling scheme was proportional stratified sampling design - 26*3 strata (NACE rev2).  However there were several exceptions. Firstly all large enterprises (3023units), that is having more than 249 employees, were included into the sample. Secondly all units from the last year sample that existed in 2008 and were not present in 2007 year sample were included into the sample.  There were 4018 such units. Thirdly due to non uniform distribution of units between different strata in the frame, some strata that contained small number of units were also included into the sample. There were 4134 such units. The remaining 4284 were allocated proportionally as mentioned above.

Reference period: according to model questionnaire

Collection method:

Mandatory, stand alone survey. Electronic questionnaire survey via statistical portal.

Population covered:

These activities are: NACE Rev. 2 sections C, D, E, F, G, H, I, J, L and N, divisions 69-74, groups 65.1, 65.2 and 95.1 and classes 64.19, 94.92, 66.12 and 66.19.

Enterprises with 10 or more persons employed

The whole territory was covered.

Population size: 85.375 enterprises

Sample size: 16.658 enterprises

Overall response rate: 75,3%

Main methodological differences compared to previous survey(s):

The sample size for non-financial enterprises is bigger than in 2009 ( 14 442 ) and amounted to 15 459.

See also Summary methodology 4. – Footnotes

Country: Poland

Year: 2009

Title: Information Society Indicators

Organisation running the survey: Central Statistical Office of Poland

Survey period: Questionnaires sent out:

General: 15-30.4.2009 – 28.5.2009

Financial: 15-30.4.2009 – 28.5.2009

Sampling and statistical methodology/ 

Stratification: General sampling scheme was proportional stratified sampling design - that is one tried to include same proportion from each of 15*3 strata. (NACE rev1) or 16*3 strata (NACE rev2) However there were several exceptions. Firstly all large enterprises (3184units), that is having more than 249 employees, were included into the sample. Secondly all units from the last year sample that existed in 2008 and were not present in 2007 year sample were included into the sample.  There were 4173 such units. Thirdly due to non uniform distribution of units between different strata in the frame, some strata that contained small number of units were also included into the sample. There were 1660 such units. The remaining 5425 were allocated proportionally as mentioned above.

Reference period: according to model questionnaire

Collection method:

Mandatory, stand alone survey, electronic questionnaire survey.

Population covered:

NACE Rev. 2: sections C, D, E, F, G, H, I, J, L and N, divisions 69-74, groups 65.1 and 65.2 and classes 64.19, 94.92, 66.12 and 66.19;

NACE Rev. 1.1: sections D, F, G, I and K, groups 55.1, 55.2, 92.1 and 92.2 and classes 65.12, 65.22, 66.01 and 66.03. Optional E covered.

Micro-enterprises were not covered.

The whole territory was covered.

Population size: 99.771 enterprises

Sample size: 15.606

Overall response rate: 76,6%

Main methodological differences compared to previous survey(s):

In the survey 2009 we have electronic questionnaires, mandatory for both surveys.

See also Summary methodology 4. – Footnotes

Country: Poland

Year: 2008

Title: Information Society Indicators

Organisation running the survey: Central Statistical Office of Poland

Survey period: Questionnaires sent out:

General: 26-30.3.2008 -

Financial: 15.4.-30.4.2008 -

Sampling and statistical methodology:

Frame population survey includes:

Sections D (15-22, 23-25, 26-28, 29-37), F (45), G (50, 51, 52), H (55.1, 55.2), I (60-63, 64),  J (65.12, 65.22, 66.01, 66.03) K((70,71,73,74), 72) and O (92.1 and 92.2).

The frame population doesn’t include:

- optional NACE divisions and groups: 40, 41, from 55.3 to 55.5 from 92.3 to 92.7 and 93

- optional NACE classes and group in J section: 67.12, 67.13, 67.2

- enterprises employed less than 10 persons

Stratification:

General sampling scheme was proportional stratified sampling design - that is one tried to include same proportion from each of 14*3 strata. However there were several exceptions. Firstly all large enterprises (2980units), that is having more than 249 employees, were included into the sample. Secondly all units from the last year sample that existed in 2007 and were not present in 2005 year sample were included into the sample.  There were 4827 such units. Thirdly due to non uniform distribution of units between different strata in the frame, some strata that contained small number of units were also included into the sample. There were 1439 such units. The remaining 4871 were allocated proportionally as mentioned above.

Reference period: Year 2007 for sales and orders data and where specified.  January 2008 for the other data

Collection method:

Mandatory, self-administered mail survey, stand alone survey

Population covered:

NACE sections: D, F, G, H, I, K + O (groups 92.1 and 92.2)

Financial sector: J 65.12 65.22 66.01 66.03

Enterprises with 10 or more persons employed:

10-49; 50-249; 250+

The whole territory was covered.

Population size: 78.850 enterprises

Sample size: 11.618

Overall response rate: 82,3%

Main methodological differences compared to previous survey(s):

In the survey 2008 we introduced an electronic questionnaire, which is mandatory.

See also Summary methodology 4. – Footnotes

Country: Poland

Year: 2007

Title: Information Society Indicators

Organisation running the survey: Central Statistical Office of Poland

Survey period: Questionnaires sent out: 26-30 March 2006; questionnaires received back: 1.08.2007

Sampling and statistical methodology:

Frame population in Enterprises survey includes:

Sections D, F, G, H (groups 55,1 and 55.2), I, K and O (92.1 and 92.2) and additional sections.

Frame population in Financial Enterprises survey includes: Section J (classes and group 65.12, 65.22, 66.01, 66.03)

The frame population doesn’t include:

optional NACE divisions and groups 22,40,41,55.3-55.5, from 92.3 to 92.7 and division 93 ; optional NACE classes/groups 67.12,67.13,67.2; enterprises employed less than 10 persons

Stratification:

General sampling scheme was proportional stratified sampling design - that is one tried to include same proportion from each of 14*3 strata. However there were several exceptions. Firstly all large enterprises that is having more than 249 employees (2736 units) were included into the sample wholly. Secondly all units from the last year sample that existed in 2006 and were not present in 2004 year sample were included into the sample.  There were 4788 such units. Thirdly due to non uniform distribution of units between different strata in the frame, some strata that contained small number of units were also included into the sample. There were 1060 such units. The remaining 5418 were allocated proportionally as mentioned above. 

Reference period: Year 2006 for sales and orders data and where specified.  January 2007 for the other data

Collection method:

Mandatory, self-administered mail survey, stand alone survey

Population covered:

NACE sections: D, F, G, H, I, K + O (groups 92.1 and 92.2)

Financial sector: J 65.12 65.22 66.01 66.03

Enterprises with 10 or more persons employed:

10-49

50-249

250+

Population size: 78.167 enterprises

Sample size: 14.930

Overall response rate: 85%

Main methodological differences compared to previous survey(s):

No difference to 2006.  Like in the previous years two separate questionnaires for non-financial and financial enterprises were applied in 2007.

Survey in Financial Enterprises (J section) is the full-scale survey which includes 826 enterprises in the required aggregates.

See also Summary methodology 4. – Footnotes

Country: Poland

Year: 2006

Title: Information Society Indicators

Organisation running the survey: Central Statistical Office of Poland

Survey period: Questionnaires sent out: 23-31 March 2006; questionnaires received 19 July 2006

Sampling and statistical methodology:

Frame population in Enterprises survey includes:

Sections D, F, G, H (groups 55,1 and 55.2), I, K and O (92.1 and 92.2) and additional sections.

Frame population in Financial Enterprises survey includes:

Section J (classes and group 65.12, 65.22, 66.01, 66.03)

The frame population doesn’t include:

optional NACE divisions and groups 22,40,41,55.3-55.5, from 92.3 to 92.7 and division 93

optional NACE classes/groups 67.12,67.13,67.2

enterprises employed less than 10 persons

Stratification:

Stratified random sample method was used in ICT usage and e-commerce survey in enterprises. Following variables were used to stratify: kind of activity according to NACE classification and size classes expressed in number of persons employed.

There were 15 strata with regard to kind of activity with a slight difference (strata 13 was split into two: consisted of NACE 70,71,74 and NACE 73 which constituted separate stratum).

Taking into account size classes the range of the number of persons employed has been split into 5 instead of 3 classes. Hence altogether there are 75 strata. Firstly, some domains of economic activity or some strata that contained very few enterprises as well as large enterprises (with more than 249 employees) were taken wholly to the sample. This gave 5128 units. Secondly to continue rotation, 4191 enterprises from the last year sample that were present in the 2005 frame were also taken to the sample. This gave 9319 units allocated without sampling. The remaining units were allocated using method of equal precision in the domain (of economic activity) and Neyman allocation among the strata (size*won –administrative unit). This way we allocated 4848 units.

Rotation will not be used for estimation, but to follow up progress in ICT usage in part of units.

The survey in Financial Enterprises (J section) is a full-scale survey so all 833 enterprises in the required aggregates are in the sample.

Reference period: Year 2005 for sales and orders data and where specified.  January 2006 for the other data

Collection method:

Mandatory, self-administered mail survey, stand alone survey

Population covered:

NACE sections: D, F, G, H, I, K + O (groups 92.1 and 92.2)

Financial sector: J 65.12 65.22 66.01 66.03

Enterprises with 10 or more persons employed:

10-49

50-249

250+

Population size: 79.708 enterprises

Sample size: 15.000

Overall response rate: 82.3%

Main methodological differences compared to previous survey(s):

NACE categories were narrowed to those required in the model questionnaire.

The sample size similar to 2005. More detailed breakdowns for the size classes was applied (5 levels) on the stage of sampling design.

Survey in Financial Enterprises (J section) is the full-scale survey which includes 833 enterprises in the required aggregates.

See also Summary methodology 4. – Footnotes

Country: Poland

Year: 2005

Title: Information Society Indicators

Organisation running the survey: Central Statistical Office of Poland

Survey period: April 2005

Sampling and statistical methodology:

Frame population in Enterprises survey includes:

Sections D, F, G, H (groups 55,1 and 55.2), I, K and O (92.1 and 92.2) and additional sections and groups for national needs: C, E and H (55.3 to 55.5).

Frame population in Financial Enterprises survey includes:

Section J (classes and group 65.12, 65.22, 66.01, 66.03, 67.12, 67.13, 67.2) and additional classes for national needs 65.11, 65.21, 65.23, 66.02, 67.11.

The frame population doesn’t include:

-          optional NACE groups from 92.3 to 92.7 and division 93

enterprises employed less than 10 persons

Stratification:

Firstly, some domains of economic activity and large enterprises (with more than 249 employees) were taken wholly to the sample. This gave 3633 units. Secondly to start rotation, enterprises from the last year sample that were present in the 2005 frame were also taken to the sample. This gave 4508 units . Thirdly some cross strata of economic activity and size that contained small number of enterprises were also taken wholly to the sample. They were 118 units. Thus we obtained 8259 units in the sample. The remaining units were allocated using method of equal precision in the domain (of economic activity) and Neyman allocation among the strata (size*won –administrative unit). This way 5265 of units were allocated. Finally just before starting the survey (in March) sample was corrected  by removing some not active enterprises and adding new units because of some small changes in population.

Reference period: Year 2004 for sales and orders data and where specified.  January 2005 for the other data

Collection method:

Mandatory, self-administered mail survey

Population covered:

NACE sections: C, D, E, F, G, H, I, J, K i O (groups 92.1 and 92.2)

Enterprises with 10 or more persons employed:

10-19

20-49

50-99

100-249

250+

Population size: 81046 enterprises

Sample size: 14904

Overall response rate: 81,86%

Main methodological differences compared to previous survey(s):

Survey was conducted in April 2005 and reference period was adequate to the requirements of the model questionnaire.

The sample size in the Enterprise survey increased from 6570 in 2004 to 12905 enterprises in 2005 (for the required NACE aggregates excluding sections C, E, J and groups 55.3-55.5). It helps to provide more precise results.

Also the sample size includes additional NACE section like C, E and groups 55.3-55.5 for 2005 round. Whole sample size (excluding J section) was 13981.

More detailed breakdown for the size classes (5 levels) and rotation in sample were applied for the selection of the sample.

Survey in Financial Enterprises (J section) has been conducted for the first time in Poland in 2005. This is the full-scale survey which includes 1232 enterprises in the required aggregates.

See also Summary methodology 4. – Footnotes

Country: Poland

Year: 2004

Title: Information Society Indicators

Organisation running the survey: Central Statistical Office of Poland

Survey period: May 2004

Sampling and statistical methodology:

The frame population does not include:

-         NACE sections C, E and J and groups 55.3, 55.4 and 55.5 in H section

enterprises employing less than 10 persons

Stratification:

There were 42 strata – 14 kinds of economic activities and 3 kinds of size classes.  We also tried to be as close as possible to the total sample size of 6500. Since the distribution of population size between the strata was unbalanced we decided to take all units to the sample from those strata that contained less than 180 elements.  This gave 1307 units. Remaining units in the sample were selected using algorithm that assures equal precision of one of the variables in each of the remaining strata. Since the survey is carried out for the first time and no prior knowledge of the surveys variables was known we decided to use one of the variables available in the Business Statistics 2003 survey, namely value of the hardware in the enterprise. So this variable was used as the stratifying variable. The applied method together with rounding units gave sample size 6570 units. No method of coordination or non-overlapping with other surveys was used.

Reference period: Year 2003 for sales and orders data.  January 2004 for the other data

Collection method:

Mandatory, self-administered mail survey

Population covered:

NACE sections: D, F, G, H (groups 55.1 and 55.2), I, K, O (groups 92.1 and 92.2)

Enterprises with 10 or more persons employed

Population size: 76205 enterprises

Sample size: 6570

Overall response rate: 82,33%

Main methodological differences compared to previous survey(s):

First time survey

See also Summary methodology 4. – Nature of the basic data