Economic Sustainability in a Wider Context: Case Study of Considerable ICT Sector Sub-Divisions

This paper situates the process of economic sustainability in the wider context of regional specialization and geographic concentration. The main object is to analyze the implications of increasing importance of sustainable development. In this context, the ICT (Information and Communication Technology) is at the same time a part of the problem and solution. The focus of this paper is also the ICT firms themselves. This research aimed to explore the ICT firms operating in the ICT sector and focused more on the ICT firms’ sustainability in connection with industry geographic concentration and regional specialization. The economic sustainability (evaluated by sustainability sub-index) and geographical and regional analysis were studied for 62 Computer Programming and 63 Information Services sub-divisions of the ICT sector. The results confirm a strong correlation between economic sustainability and firm geographic concentration. Results show that a worsening value of economic sustainability does not always lead to the worsening conditions in the industry and there is a strong relationship between the economic sustainability and regional analysis.


Introduction
Within the last years, sustainability has passed from an ambiguous concept promoted by public bodies in developed countries to a daily concern of a majority of people, organizations, and companies across the world. In that context, ICT (Information and Communication Technology) is at the same time part of the problem and of the solution [1].
There is clear evidence that ICT may positively influence enterprise competitiveness but also social and environmental issues [2] and the impact of ICT on sustainability is ambiguous: whether ICT constitutes a threat or a cure to environmental degradation is controversially discussed [3].
One thing is for sure, ICT has offered many new opportunities to address and improve sustainability topics from the local level up to global concepts such as the EU's emission trading system. Targeted improvements in the industry can only be effective and efficient when company sustainability management is available [1].
Many enterprises adopt and use information and communication technologies (ICTs) to achieve their social mission. ICT has the potential to address the three main aspects of sustainability (people, planet, and profit, known as the Triple Bottom Line [4]), therefore several organizations have initiated sustainable development by integrating ICT with their business activities [5]. Some organizations have The importance of monitoring the sustainability of the ICT sector at the European level as well as in the Slovak Republic confirms the statistics of the Business demography of the ICT Sector in Europe [32]. These statistics point to a significant increase in Net business population growth in the ICT sector in the Slovak Republic in comparison to the chosen countries (Appendix A). Net business population growth defines a growth rate between t (time) and t − 1 of the population of active enterprises that represent the rate of active enterprises that have employment and/or within a certain period (one year). Madudova and Kolarovszki (2016), Madudova (2016;, and Stalmasekova, Genzorova and  confirmed that this primacy is largely influenced by the progressing of sub-divisions 62 Computer Programming and 63 Information Services. Sub-divisions 62 and 63 of the ICT sector have also been evaluated because they showed the highest increase and sustainability potential in the future [28][29][30][31].

Materials and Methods
In advance, it is important to describe sub-divisions 62 and 63 in more detail and define the activities this sub-divisions include.

ICT Sub-Divisions Classification
The ICT sector according to the Statistical Office of the Slovak Republic [33] categorization (SK NACE rev.2) is defined as the sector including Publishing Activities, Film, Video, TV Production, Broadcasting, Telecommunications, Computer Programming, and Information Services. ICT Sector in the Slovak Republic is defined as the sector including: 62, Computer Programming; and 63, Information Services (Table 1); and Telecommunications, which are excluded from the research. When the statistics for the 62 and 63 sub-divisions were unavailable (at the European Level), the authors used the categorization of ICT services (ICT manufacturing was excluded).

Economics Sustainability
The methodology of calculating the individual indicators of economic sustainability is based on the methodology of sustainability performance [34][35][36][37], more precisely Composite Sustainable Development Index. Within this methodology [37,38], deeply described in [37], the relative corporate contribution to sustainability can be measured in absolute monetary terms. It does not show whether the use of the resource by this entity is sustainable in absolute terms, but it indicates how much more sustainable the use of the resource is in comparison with other entities. Grajnc and Glavic (2005) introduced this method as the assessment of products, services, and technologies. This method can be used for assessing the sustainability performance of a company, too. They calculated economic sustainability by the sustainability sub-index. Moore deeply described this sustainability sub-index; the detailed calculation methodology can be found in [35][36][37].
The procedure for calculating the index is divided into selection, grouping and judging the indicators, weighting, normalizing and calculating sub-indices [35,36].
Selection, grouping and judging the indicators: First, proper performance indicators are selected covering different aspects of sustainability. Then, the indicators are grouped into dimensions of sustainable development.
Weighting: Pair-wise comparison technique is used to derive relative weights of each indicator. This method is based on the analytic hierarchy process (AHP) [39,40].
Normalizing: Indicators used for the composite sustainable development index can be expressed in different units. Therefore, they have to be normalized according to Equation (1), where I + A,ijt is an indicator of positive performance, I − A,ijt is an indicator of negative performance, A is the actual indicator, N is the normalized indicator, and t is time.
Calculating sub-indices: The sub-indices are calculated by multiplying each normalized indicator value with its weight and summing up all multiplications (Equation (2)), where I Sjt is Sustainability sub-index and W ji is the weight of indicators i for the group of sustainability indicators j.
The sub-indices were calculated by multiplying each normalized indicator value with its weight and summing up all multiplications. The weight of each dimension is estimated.

Regional Sustainability: Regional Specialization and Geographic Concentration
The main objective of this methodological approach is monitoring the concentration of economic activity in sub-divisions 62 and 63 and examining whether the concentration of these sub-divisions is higher than the concentration of all the economic sectors randomly or this concentration is not random (happening by chance). Brülhart and Traeger (2005) distinguished between absolute and relative concentration (or specialization measures) [41]. Absolute concentration measures the spread of industrial activities across countries. An industry is said to be absolutely concentrated if its output is generated in only one or a few regions. Relative concentration measures the difference between an industry's spread of phenomenon and the average spread of phenomenon. Thus, an industry is relatively concentrated if its output is more concentrated than total economic output in the area [42].
The spatial effects have been calculated using exploratory data analysis [41][42][43] by means of descriptive statistics that have been extended to the spatial domain with the Location Index, Coefficient of Concentration, and Lorenz Curve. This study approached the issue of both 62 and 63 sub-divisions of ICT specialization of regions and geographic concentration of these sub-divisions. Regional specialization is usually analyzed in connection with geographic concentration and its distribution in the regional dimension.
Location index (LI) measures a region's industrial specialization relative to a larger geographic unit. The LI is calculated as an industry's share of a regional total for some economic statistic divided by the industry's share of the national total for the same statistics, where, X ij means number of employees of the i-th sector in the selected region, Y i is the number of employees of the i-th sector in the relevant country, S i is the population in the selected region and S is the population in the relevant country [43].
Hoover Coefficient of Concentration (CC) compares the intensity of regional employment with the intensity of the national employment. Coefficient shows the proportion of all income which would have to be redistributed to achieve a state of perfect equality.
where X ij is sectoral (i) employment in region j, X kj is total employment in region j, X i is sectoral employment at the national level, and X k is total employment at the national level [43].

Data
The Pearson correlation coefficient was calculated at the European level (Table 2), while the Economic sustainability sub-index, Location Index, and Hoover Coefficient were calculated at the national level (Slovak Republic). The Sustainability sub-index has been calculated separately for the firms operating in the SK NACE Rev 2 Classification in 62 Computer programming and 63 Information services sub-divisions. This method is based on data that are published in annual reports and firm financial databases. All data are reliable due to auditing.
The calculations include all the firms operating in these sub-divisions (62 and 63) in the area of the Slovak Republic in years 2010-2016. All variables used are described in Table 2 and number of firms used in calculations for individual years is described in Table 3. Location Index and Hoover Coefficient of concentration were been calculated separately for sub-divisions 62 and 63.

Results
The primary objective of the authors was to determine the correlation between: (1) National average monthly wage and National Employment; and (2) Percentage of ICT services on GDP and National employment.
It is evident from the histogram (Figure 1) that 11 EU countries account for interval of 3-4% of GDP. An exception is Ireland, where the ICT sector accounts for 9.67% of GDP. The high share of the ICT sector on GDP can also be seen in Luxembourg, Sweden and United Kingdom. On the other hand, Norway, surprisingly, accounts for 3.28% in a part of service of ICT sector. The primary objective of the authors was to determine the correlation between: (1) National average monthly wage and National Employment; and (2) Percentage of ICT services on GDP and National employment.
It is evident from the histogram (Figure 1) that 11 EU countries account for interval of 3-4% of GDP. An exception is Ireland, where the ICT sector accounts for 9.67% of GDP. The high share of the ICT sector on GDP can also be seen in Luxembourg, Sweden and United Kingdom. On the other hand, Norway, surprisingly, accounts for 3.28% in a part of service of ICT sector. Based on the correlation of mentioned variables of EU28 and Norway, Turkey, Montenegro, Iceland, Switzerland, Liechtenstein, and Macedonia, the following hypotheses were determined relating to economic sustainability (Table 4):

H0: There is no significant linear relationship between the ICT sector Employment and the percentage of the ICT services on GDP at the EU level.
H0: There is no significant linear relationship between the ICT sector Employment and the ICT sector wage at the EU level.  Based on the correlation of mentioned variables of EU28 and Norway, Turkey, Montenegro, Iceland, Switzerland, Liechtenstein, and Macedonia, the following hypotheses were determined relating to economic sustainability (Table 4): H0: There is no significant linear relationship between the ICT sector Employment and the percentage of the ICT services on GDP at the EU level.
H0: There is no significant linear relationship between the ICT sector Employment and the ICT sector wage at the EU level. There is a significant linear relationship between the ICT sector employment and the percentage of the ICT services on GDP at the European level.
There is a significant linear relationship between the ICT sector Employment and the ICT sector wage at the European level.
When describing the relationship between the variables of the ICT sector employment and the percentage of the ICT services on GDP at the European level, the strength of the correlation is determined by the magnitude of the Pearson correlation coefficient ( Table 4). The R = 0.705 suggests a large or a strong correlation. The level of statistical significance (p-value) of the correlation coefficient is, in this case, 9.28 × 10 −6 , which means, that there is a statistically significant relationship between these two variables. Therefore, the hypothesis H 0 is rejected and the hypothesis H 1 accepted.
When describing the relationship between the variables of the national average monthly wage and ICT services employment, the Pearson correlation coefficient is R = 0.681. This result suggests a large or a strong correlation. The level of statistical significance (p-value) of the correlation coefficient is, in this case, 6.58 × 10 −5 , which means, that there is a statistically significant relationship between these two variables. Therefore, the hypothesis H 0 is rejected and the hypothesis H 1 accepted.
As written above, there is a significant relationship between: (1) the ICT sector employment and the Percentage of the ICT services on GDP; and (2) the ICT sector employment and the ICT sector average monthly wage. Based on described findings, it can be assumed that the ICT sector greatly affects not only the GDP, but also the national economy. This situation may affect the ubiquity of the ICT services, with respect to sub-divisions 62 and 63.
Relationship of all three variables, ICT sector employment, Percentage of the ICT services on GDP and Average monthly wage in ICT services, is described in Figure 2. Figure 2 presents the related values of Average monthly wage in the selected quadrant.
Employment and wage variables will also be considered in calculating the economic sustainability of the ICT sector. Since the sub-index of economic sustainability is data-intensive, it was calculated at the national level on the example of the Slovak Republic. When describing the relationship between the variables of the ICT sector employment and the percentage of the ICT services on GDP at the European level, the strength of the correlation is determined by the magnitude of the Pearson correlation coefficient ( Table 4). The R = 0.705 suggests a large or a strong correlation. The level of statistical significance (p-value) of the correlation coefficient is, in this case, 9.28 × 10 −6 , which means, that there is a statistically significant relationship between these two variables. Therefore, the hypothesis H0 is rejected and the hypothesis H1 accepted.
When describing the relationship between the variables of the national average monthly wage and ICT services employment, the Pearson correlation coefficient is R = 0.681. This result suggests a large or a strong correlation. The level of statistical significance (p-value) of the correlation coefficient is, in this case, 6.58 × 10 −5 , which means, that there is a statistically significant relationship between these two variables. Therefore, the hypothesis H0 is rejected and the hypothesis H1 accepted .
As written above, there is a significant relationship between: (1) the ICT sector employment and the Percentage of the ICT services on GDP; and (2) the ICT sector employment and the ICT sector average monthly wage. Based on described findings, it can be assumed that the ICT sector greatly affects not only the GDP, but also the national economy. This situation may affect the ubiquity of the ICT services, with respect to sub-divisions 62 and 63.
Relationship of all three variables, ICT sector employment, Percentage of the ICT services on GDP and Average monthly wage in ICT services, is described in Figure 2. Figure 2 presents the related values of Average monthly wage in the selected quadrant.
Employment and wage variables will also be considered in calculating the economic sustainability of the ICT sector. Since the sub-index of economic sustainability is data-intensive, it was calculated at the national level on the example of the Slovak Republic.

Economic Sustainability
Appendix B shows the number of Slovak enterprises in divisions 62 and 63 in the graph. This graph compares the number of firms operating in mentioned divisions in the period 2008-2016. These sub-divisions are relatively stable and a growing number of firms (numeric data) can also be seen in Table 3.

Economic Sustainability
Appendix B shows the number of Slovak enterprises in divisions 62 and 63 in the graph. This graph compares the number of firms operating in mentioned divisions in the period 2008-2016. These sub-divisions are relatively stable and a growing number of firms (numeric data) can also be seen in Table 3.

Sustainability Sub-Index
The sustainable approach determines the indicators (Table 5) (Table 6). Considering the evidence that calculations should include not only the number of employees but the wage as well, authors have more deeply analyzed the reason of this unsustainability in 63 sub-divisions in a wide context. This context has been extended with regard to Regional Specialization and Geographic concentration of these sub-divisions. The reason was to find out if specialization and concentration influence the sustainability sub-index results.

Regional Sustainability: Regional Specialization and Geographic Concentration
In the past, the ICT sector in the Slovak Republic has been notably concentrated in one region of the Slovak Republic (the region where the capital city is located). This has not been a very positive phenomenon in connection with the country's economic sustainability. In addition, the indicators reveal a change in the spatial concentration of the sub-divisions 62 and 63, not excluding the Regional Specialization.
The first step (Table 7) was to find out if there is any correlation of the financial indicators (Net Profit, Sales, Value Added, and Credit Scoring indicators) and the geographic concentration (Region indicator) of 62 and 63 sub-divisions (SK NACE indicator) during 2010-2016. The correlation analysis shows that character and the nature of mentioned sub-divisions are not dependent on the spatial concentration (localization in larger cities). Tables 7 and 8 present the outcomes resulting in the conclusion that geographic concentration of 62 and 63 sub-divisions did not influence the firm financial indicators in 2010-2016. When there is no direct correlation between financial indicators and firm geographic concentration and the industry is not heavily concentrated in one or few regions, with respect to administrative centers, this can become ubiquitous.
Sub-divisions 62 and 63 can become ubiquitous, in other words existing or being everywhere, especially at the same time, in all regions. The same is true for the demand of 62 and 63 sub-divisions, because all sectors, industries and firms use them in their own processes.
The following calculations of the regional specialization and geographic concentration in 2010-2016 describes a changing trend in disparities of individual regions of the Slovak Republic in researched sub-divisions (Figures 3 and 4).  . This means that this region has a higher specialization in mining that the nation. There is an ICT cluster located in this region. This cluster (Košice IT Valley) plays an important (not only regional but also a national) role. In 2015, this cluster was certified as the first in central Europe and is one of three certified clusters in the area of information and communication technologies in central Europe. In the central part of the Slovak Republic the Žilina Region plays an important role. Even when the Location Index is proportional to the population, during the seven-year period, this index has increased, which indicates rising specialization of this region.
This positive trend has also been evaluated in contrast of regional vs. national and sectoral vs. total employment in Hoover coefficient of concentration in 62 and 63 sub-divisions.
As can be seen in Figure 4, the employment concentration has changed (increased) over time. This change can be most seen in the Košice Region. This confirms changing geographic concentration in ICT sector. This shift is presented by decreasing concentration in Bratislava Region, where the capital city is located and strong increase in concentration in the Žilina and Košice Regions. This trend can reflect the job creation in these sub-divisions mainly in Košice and Žilina Regions. Figure 5 refers to the degree to which the intensity of this phenomenon differs between regions. There appear to be significant differences in the degree of geographic concentration with the index increasing from 0.25 to −0.1. The higher is the index of concentration, the more concentrated is the industry of the region. Decreasing negative index means diminishing concentration disparities in regions. As can be seen in Figure 4, the geographic concentration of employment shifts over time with decreases in Bratislava Region and increases in other regions.  Figure 3 presents the values of the Location Index. The largest increase in the index appears in Košice Region, where the index increased from the 0.59 to 1.81. This means that this region has a higher specialization in mining that the nation. There is an ICT cluster located in this region. This cluster (Košice IT Valley) plays an important (not only regional but also a national) role. In 2015, this cluster was certified as the first in central Europe and is one of three certified clusters in the area of information and communication technologies in central Europe. In the central part of the Slovak Republic the Žilina Region plays an important role. Even when the Location Index is proportional to the population, during the seven-year period, this index has increased, which indicates rising specialization of this region.
This positive trend has also been evaluated in contrast of regional vs. national and sectoral vs. total employment in Hoover coefficient of concentration in 62 and 63 sub-divisions.
As can be seen in Figure 4, the employment concentration has changed (increased) over time. This change can be most seen in the Košice Region. This confirms changing geographic concentration in ICT sector. This shift is presented by decreasing concentration in Bratislava Region, where the capital city is located and strong increase in concentration in the Žilina and Košice Regions. This trend can reflect the job creation in these sub-divisions mainly in Košice and Žilina Regions. Figure 5 refers to the degree to which the intensity of this phenomenon differs between regions. There appear to be significant differences in the degree of geographic concentration with the index increasing from 0.25 to −0.1. The higher is the index of concentration, the more concentrated is the industry of the region. Decreasing negative index means diminishing concentration disparities in regions. As can be seen in Figure 4, the geographic concentration of employment shifts over time with decreases in Bratislava Region and increases in other regions.

Discussion
The research results show that there is a significant relationship between employment and GDP and between employment and wages as well. When considering economic sustainability, including employment and wage data, the results were not satisfying. Values of sustainability sub-index have not been as positive and sustainable as the authors expected. The value of the labor cluster of this index has decreased by sub-division 63 and not changed in sub-division 62.
The authors researched the economic sustainability in a wider context and found the relationships among geographic concentration, regional specialization, wage and employment in this sector. These conclusions can be explained as a migration of the labor force of the researched subdivisions from the strongly specialized Bratislava Region to other regions.
Similar to many other countries, in the Slovak Republic, the highest wages are earned in the capital city (situated in Bratislava Region). Significant regional disparities may be recognized in the eastern parts of the country. This situation reflects the lower and unequal wages in comparison with central and west part of the country.
Taking this explanation into account, the stable or decreasing Labor indicators in 62 and 63 subdivisions may confirm changing the geographic concentration of this sub-division, migration of the labor force from the west to the east and consequently the wage rate change.
Considering the firm sustainability, the increasing wage could lead to bankruptcy or increase the national economy. Regional disparities can be diminished, but it is rarely possible to eliminate regional disparities nationwide. Considering that the wage in each region can differ, it is important to monitor the constancy (steadiness) of wages and the creation of new jobs.
Accordingly, the ICT sector in the Slovak Republic is sustainable. The values of Labor indicators in Sustainability sub-index can be considered positive with regard to regional analysis.
It is important to link changing regional specialization and geographic concentration with the economic sustainability indicators. A worsening value of economic sustainability does not always confirm worsening conditions in the industry. On the contrary, these results can settle diminishing regional disparities contributing to better national economic stability ( Figure 5).

Discussion
The research results show that there is a significant relationship between employment and GDP and between employment and wages as well. When considering economic sustainability, including employment and wage data, the results were not satisfying. Values of sustainability sub-index have not been as positive and sustainable as the authors expected. The value of the labor cluster of this index has decreased by sub-division 63 and not changed in sub-division 62.
The authors researched the economic sustainability in a wider context and found the relationships among geographic concentration, regional specialization, wage and employment in this sector. These conclusions can be explained as a migration of the labor force of the researched sub-divisions from the strongly specialized Bratislava Region to other regions.
Similar to many other countries, in the Slovak Republic, the highest wages are earned in the capital city (situated in Bratislava Region). Significant regional disparities may be recognized in the eastern parts of the country. This situation reflects the lower and unequal wages in comparison with central and west part of the country.
Taking this explanation into account, the stable or decreasing Labor indicators in 62 and 63 sub-divisions may confirm changing the geographic concentration of this sub-division, migration of the labor force from the west to the east and consequently the wage rate change.
Considering the firm sustainability, the increasing wage could lead to bankruptcy or increase the national economy. Regional disparities can be diminished, but it is rarely possible to eliminate regional disparities nationwide. Considering that the wage in each region can differ, it is important to monitor the constancy (steadiness) of wages and the creation of new jobs.
Accordingly, the ICT sector in the Slovak Republic is sustainable. The values of Labor indicators in Sustainability sub-index can be considered positive with regard to regional analysis.
It is important to link changing regional specialization and geographic concentration with the economic sustainability indicators. A worsening value of economic sustainability does not always confirm worsening conditions in the industry. On the contrary, these results can settle diminishing regional disparities contributing to better national economic stability ( Figure 5).  The national policy objective is not to achieve equal employment in sub-divisions 62 and 63 in all regions. The wage adjustment in individual regions is more substantial for employees working in subsectors 62 and 63.
From the results of the Economic sustainability and spatial analysis of the industry, it can be concluded that the job creation is sustainable and improving economic performance of this sector, declaring the possibility of wage growth in the future nationwide without liquidation or negative impacts and consequences on firms operating in sub-divisions 62 and 63.

Conclusions
The first important finding of the research was the relationship between the amount of wage, employment in the ICT sector and the impact of the ICT sector on GDP.    The national policy objective is not to achieve equal employment in sub-divisions 62 and 63 in all regions. The wage adjustment in individual regions is more substantial for employees working in subsectors 62 and 63.
From the results of the Economic sustainability and spatial analysis of the industry, it can be concluded that the job creation is sustainable and improving economic performance of this sector, declaring the possibility of wage growth in the future nationwide without liquidation or negative impacts and consequences on firms operating in sub-divisions 62 and 63.

Conclusions
The first important finding of the research was the relationship between the amount of wage, employment in the ICT sector and the impact of the ICT sector on GDP.  From the regional perspective, sub-divisions 62 and 63 are not entirely different in the individual regions (with the exception of the Bratislava Region, where the level of wage is not so different from what it was in the past). Large differences can be observed in the regional employment of sub-divisions 62 and 63. These disparities decrease over time.
The national policy objective is not to achieve equal employment in sub-divisions 62 and 63 in all regions. The wage adjustment in individual regions is more substantial for employees working in subsectors 62 and 63.
From the results of the Economic sustainability and spatial analysis of the industry, it can be concluded that the job creation is sustainable and improving economic performance of this sector, declaring the possibility of wage growth in the future nationwide without liquidation or negative impacts and consequences on firms operating in sub-divisions 62 and 63.

Conclusions
The first important finding of the research was the relationship between the amount of wage, employment in the ICT sector and the impact of the ICT sector on GDP.
A Pearson's correlation was run to assess the relationship between the ICT sector employment and the percentage of the ICT services on GDP. There is a strong positive correlation between these two variables, R(31) = 0.705, p < 0.005. There is also a strong positive correlation between the Average monthly wage and Employment variables, R(28) = 0.681, p < 0.005.
Subsequently, the economic sustainability values were calculated. They are described in detail in Section 3.1.
In pursuing the sustainability of the ICT sector, interesting facts were found. The sector sustainability cannot be clearly assessed only by the evaluation of economic data related to economic sustainability; it is also important to take into account the change of regional specialization and geographic concentration of industry.
Consequently, the authors further investigated whether the geographic concentration of industry and regional specialization impact the change in the value of sustainability of sub-divisions 62 and 63 of the ICT sector to confirm the assumption of the change in geographic concentration of industry. In the case of the ICT sector, we confirmed the specificities resulting from the ubiquity of sub-divisions 62 and 63, which is also connected with the portability of the service and a low need to be bound to one physical location.
It can be concluded that unchanging (or decreasing) value of Sustainability sub-index is not always a negative phenomenon. Further, this should be examined more closely in a context of the change in the geographic concentration.
The results were described in the example of the case study of the considerable ICT sector sub-divisions. Conclusions may also be applicable in any sector based on reasons mentioned several times above and graphically depicted in Figure 7. A Pearson's correlation was run to assess the relationship between the ICT sector employment and the percentage of the ICT services on GDP. There is a strong positive correlation between these two variables, R(31) = 0.705, p < 0.005. There is also a strong positive correlation between the Average monthly wage and Employment variables, R(28) = 0.681, p < 0.005.
Subsequently, the economic sustainability values were calculated. They are described in detail in Section 3.1.
In pursuing the sustainability of the ICT sector, interesting facts were found. The sector sustainability cannot be clearly assessed only by the evaluation of economic data related to economic sustainability; it is also important to take into account the change of regional specialization and geographic concentration of industry.
Consequently, the authors further investigated whether the geographic concentration of industry and regional specialization impact the change in the value of sustainability of sub-divisions 62 and 63 of the ICT sector to confirm the assumption of the change in geographic concentration of industry. In the case of the ICT sector, we confirmed the specificities resulting from the ubiquity of sub-divisions 62 and 63, which is also connected with the portability of the service and a low need to be bound to one physical location.
It can be concluded that unchanging (or decreasing) value of Sustainability sub-index is not always a negative phenomenon. Further, this should be examined more closely in a context of the change in the geographic concentration The results were described in the example of the case study of the considerable ICT sector subdivisions. Conclusions may also be applicable in any sector based on reasons mentioned several times above and graphically depicted in Figure 7. In conclusion, the authors recommend calculating the economic sustainability in relation to geographic concentration and regional specialization in terms of the correct evaluation of the economic sustainability of the sector, since several previous studies assess these two views (regional specialization with geographic concentration) separately. The paper methodically provides a guide for measuring and assessing sustainability not only for the ICT sector but also for other sectors.  In conclusion, the authors recommend calculating the economic sustainability in relation to geographic concentration and regional specialization in terms of the correct evaluation of the economic sustainability of the sector, since several previous studies assess these two views (regional specialization with geographic concentration) separately. The paper methodically provides a guide for measuring and assessing sustainability not only for the ICT sector but also for other sectors. Programming (Computer programming, consultancy and related activities, Computer programming activities, Computer facilities management activities, Other information technology and computer service activities) and 63 refers to Information Services (Data processing, hosting and related activities, Web portals, News agency activities, Other information service activities)). Figure A2. Number of firms operating in sub-divisions 62 and 63 in 2008-2016 (62 refers to Computer Programming (Computer programming, consultancy and related activities, Computer programming activities, Computer facilities management activities, Other information technology and computer service activities) and 63 refers to Information Services (Data processing, hosting and related activities, Web portals, News agency activities, Other information service activities)).