The National H-index Ranking is not just a statistical indicator, but a powerful tool for assessing the scientific potential of a country. For Bulgaria, this ranking represents both a challenge and an opportunity to strengthen its position in the international scientific ecosystem.

What is Bulgarian National H-index Ranking?
The National H-Index of Bulgaria is an independent international instrument designed to assess the scientific productivity of Bulgarian scientists, research groups and organizations. The ranking is based on the consolidated Hirsch index, which reflects the country's contribution to world science and the impact of Bulgarian research.
The indicator is calculated based on data from leading scientometric platforms such as Scopus, Web of Science, and Google Scholar. Based on these data, the value of the National Hirsch rating is formed, which determines the ranked place of the country in the ranking (Position).
Functions of Bulgarian National H-index Ranking
- assessment of scientific productivity: analysis of the results of the work of researchers and research institutes in Bulgaria on the basis of their contribution to world science
- Comparison of achievements: Providing an opportunity to compare scientific results at the national and international levels to identify strengths and areas for improvement
- Stimulating competitiveness: supporting the development of the scientific environment, increasing the country's competitiveness in the global scientific ecosystem and promoting innovative projects
- Prioritization of funding: Assistance in prioritizing the allocation of research grants and other forms of support based on objective indicators.
Bulgaria's position in the world scientific space
The scientific potential of Bulgaria is traditionally strong in such areas as mathematics, physics, biology and information technology. However, relatively low funding for scientific activities and limited access to international resources create difficulties for reaching leading positions.
In the National H-index Ranking, Bulgaria is not yet among the leaders, but shows stable growth. Hirsch index of Bulgaria as of Q4 2024:
- Scopus h-index – 394
- Web of Science h-index – 351
- Google Scholar h-index – 499.
The successes of individual scientists and universities, such as the Bulgarian Academy of Sciences (National H-index - 198) or the University of Sofia "St. George". St. Clement of Ohrid" (National H-index - 171), testify to the presence of a high intellectual potential.
The updated Bulgarian National H-index Ranking for the fourth quarter of 2024 can be found in our previous article.
The Impact of National H-index Ranking on Scientific Competitiveness
● Attracting international sponsors
A high position in the National H-index Ranking strengthens the country's reputation as a reliable partner for international scientific cooperation. This helps to attract funding from organizations such as the European Commission, Horizon Europe and other large foundations.
● Improving the reputation of universities
The results of the ranking directly affect the prestige of Bulgarian universities and scientific institutes. High positions help attract international students and teachers, which contributes to the internationalization of education.
● Motivation of researchers
Participation in the rankings encourages scientists to work on improving the quality and number of publications. Researchers can assess their place in the Bulgarian research environment and compare their achievements with the productivity of scientists from other countries. This creates an additional impetus for the development of national science.
● Supporting innovation and the economy
Science is closely related to economic development. The research published by Bulgarian scientists creates the basis for technological innovations, which contributes to improving the competitiveness of the national economy.
The development of the scientific field, the support of researchers and active participation in global projects will help Bulgaria to improve its results and make a significant contribution to world science.
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