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Some equations to identify the threshold value in the DEMATEL method

100%
EBRAHIMI S. H.
Operations Research and Decisions
|
2023
|
vol. 33
|
issue 2
1-22
EN
DEMATEL technique is a graphical representation method to deal with complex systems. The final analyzed cause and effect categorization would be fundamentally dependent on the threshold value setting. This research is intended to present some mathematical models for calculating the threshold value in the DEMATEL method. The min(max) operator has been intentionally used for considering three equations to identify the threshold value. Additionally, the proposed mathematical equations are gradually developed to gain more useful data to yield a threshold value as well. Particularly, the expert’s initial scoring for building the primary matrix would also be applied in one equation. Results show eliciting an expert’s opinions regarding the value of a threshold value determination leads to setting relatively high thresholds. But, there would be an equation which takes advantage of more data derived from the total influence matrix T. Moreover, a span of different threshold values is gained by making use of the Hamacher t-conorms operator which especially would cause better complexity management of the final total matrix T based on expert’s opinions. As a contribution to this research, threshold value determination is developed mathematically by making use of the direct data gained by the total matrix T. Besides combining data derived from total matrix T, the initial influence direct matrix given by experts, a simpler aggregating procedure and no need for statistical information compared to special Lenth’s method hints at this research’s novelty as well.
2
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Barriers to immigrant entrepreneurship: A causal relationship analysis of the Asian immigrant entrepreneurs in Germany employing the DEMATEL approach

100%
Sabary G. S., Ključnikov A.
Equilibrium. Quarterly Journal of Economics and Economic Policy
|
2023
|
vol. 18
|
issue 2
491-522
EN
Research background: Entrepreneurship and migration are top priorities on many national and international agendas. As a result, entrepreneurship is one of the most popular strategies immigrants use to avoid unemployment in a host country. However, studies lack to discuss causal relationships among key barriers to immigrant entrepreneurs. Purpose of the article: This study attempts to fill the knowledge gap and investigate the causal relationship between the primary obstacles faced by Asian immigrant entrepreneurs in Germany. Methods: A predesigned questionnaire was used in face-to-face interviews with Asian business owners in Germany for the study, and the Decision-Making Trial and Evaluation Laboratory (DEMATEL) method of data analysis was used. Findings & value added: The findings reveal that lack of sufficient financial resources to establish a business, high market competition, and a lack of knowledge of the local language of the host country are the most significant barriers, among others, which may severely hamper Asian immigrant business performance and have a considerable impact on their entrepreneurial decision. At the same time, lack of professional knowledge & skills, problems with rules & regulations, and cultural differences are among the least essential obstacles for Asian immigrant entrepreneurs. The findings show that unfamiliarity with the local language, problems with rules and regulations, cultural differences, and lack of international business experience are associated with the causer category. However, lack of enough capital to establish a venture, lack of professional knowledge and skills, difficulty in access to financial resources, and high market competition relate to the receiver category. This research generates value for policymakers, particularly those participating in migration studies. One of the study's novelties is using the DEMATEL framework for decision-making on barriers to immigrant entrepreneurship in the European context.
3
Publication available in full text mode
Content available

Some equations to identify the threshold value in the DEMATEL method

88%
Ebrahimi S. H.
Operations Research and Decisions
|
2023
|
vol. 33
|
issue 2
EN
DEMATEL technique is a graphical representation method to deal with complex systems. The final analyzed cause and effect categorization would be fundamentally dependent on the threshold value setting. This research is intended to present some mathematical models for calculating the threshold value in the DEMATEL method. The min(max) operator has been intentionally used for considering three equations to identify the threshold value. Additionally, the proposed mathematical equations are gradually developed to gain more useful data to yield a threshold value as well. Particularly, the expert’s initial scoring for building the primary matrix would also be applied in one equation. Results show eliciting an expert’s opinions regarding the value of a threshold value determination leads to setting relatively high thresholds. But, there would be an equation which takes advantage of more data derived from the total influence matrix T. Moreover, a span of different threshold values is gained by making use of the Hamacher t-conorms operator which especially would cause better complexity management of the final total matrix T based on expert’s opinions. As a contribution to this research, threshold value determination is developed mathematically by making use of the direct data gained by the total matrix T. Besides combining data derived from total matrix T, the initial influence direct matrix given by experts, a simpler aggregating procedure and no need for statistical information compared to special Lenth’s method hints at this research’s novelty as well.
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