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sustainability
Article
The Sustainable Development Goals in Scientific
Literature: A Bibliometric Overview at the Meta-Level
Christine Meschede
Department of Information Science, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany;
christine.meschede@hhu.de
Received: 18 March 2020; Accepted: 26 May 2020; Published: 1 June 2020
Abstract:
In 2015, the UN adopted the Sustainable Development Goals (SDGs), addressing social,
environmental, and economic targets. Global partnerships, transnational, and interdisciplinary
research are essential for achieving progress towards the SDGs. This study analyzes 4593 research
articles at the meta-level, explicitly referring to the SDGs. This a comparably small amount of
research items directly addressing the goals. However, comparisons with existing approaches using
different queries are possible. Research that links to the SDGs through its title, keywords, or abstract
facilitates knowledge sharing on the goals as it is easier to identify relevant work. Using scientometric
means, we assessed the corresponding sources, research areas, affiliated countries, thematic foci,
and the availability of funding acknowledgments. The results are useful for identifying research
gaps and potential collaboration possibilities. The outcomes suggest that most research referring to
the SDGs comes from the research areas Life Sciences & Biomedicine and Social Sciences. The most
predominant SDG among the analyzed research articles is SDG 3 (“good health and well-being”).
A relatively high share of open access articles contributes to the idea of knowledge sharing for the
SDGs. Nearly 37% of all articles count as international publications, i.e., as being co-authored by
authors from affiliations of multiple countries.
Keywords:
sustainable development goals; bibliometric study; multidisciplinary research;
transnational cooperation
1. Introduction
In 2015, the United Nations adopted 17 Sustainable Development Goals (SDGs) within the Agenda
2030, thus making an attempt towards ending poverty, protecting the planet and ensuring prosperity
for all [1]. With these goals the United Nations aim at promoting sustainable development regarding
all its manifestations, i.e., environmental, economic and social dimensions (Table 1). The most common
definition of sustainable development describes it as a “development that meets the needs of the
present without compromising the ability of future generations to meet their own needs” ([
2
], p. 37).
Rather than focusing on development in developing countries, the Agenda 2030 demands action of
all countries. Each goal is further substantiated in concrete targets and corresponding measurable
indicators, summing up to 169 targets and more than 200 indicators which can be modified among
different countries, regions or municipalities.
SDG 17, “Partnerships for the goals” can be regarded as a meta-goal for implementing the
SDGs. Global partnerships as well as international and transnational research are essential for
contributing to a sustainable development [
3
,
4
]. Several initiatives support collaboration on sustainable
development in general and the SDGs in particular. For example, the Partnerships for SDGs online platform
(https://sustainabledevelopment.un.org/partnerships/) provides a registry for sharing knowledge and
expertise for the SDGs among different stakeholders. Besides international cooperation, the SDGs cannot
be achieved without multi- and interdisciplinary research due to its complexity. “The success of the
Sustainability 2020,12, 4461; doi:10.3390/su12114461 www.mdpi.com/journal/sustainability
Sustainability 2020,12, 4461 2 of 14
SDGs is directly related to the strengthened collaboration of its actors. In this sense, the scientific
community helps in the translation of the global goals into practical national and local levels
agendas” ([
4
], p. 843). The Aurora Universities Network coordinates an initiative to map research
output to the SDGs. Within a survey, researchers were requested to assign their research to the
SDGs (https://aurora-network.global/project/sdg-analysis-bibliometrics-relevance/), which helps in
identifying collaborators and relevant research output.
Table 1. UN Sustainable Development Goals [1].
SDG Title
1 No poverty
2 Zero hunger
3 Good health and well-being
4 Quality education
5 Gender equality
6 Clean water and sanitation
7 Affordable and clean energy
8 Decent work and economic growth
9 Industry, innovation and infrastructure
10 Reduced inequalities
11 Sustainable cities and communities
12 Responsible consumption and production
13 Climate action
14 Life below water
15 Life on land
16 Peace, justice and strong institutions
17 Partnerships for the goals
Research which supports the SDGs can assume different forms. In particular, two forms can
be distinguished:
1.
Research that supports the progress towards particular targets of the SDGs without necessarily
referring to the SDGs (e.g., research on poverty alleviation or climate change without reference to
its contributions on the SDGs)
2.
Research that directly refers to the SDGs (e.g., meta-research that is concerned with the overall
political agenda behind the SDGs, or, studies that work towards particular targets but still mention
the overall contribution to the SDGs)
This article seeks to assess current research on the SDGs that directly refers to the goals. By doing
so, we contribute to the assessment of the current status of research on the SDGs and demonstrate research
gaps as well as potential for further collaboration which is essential for achieving progress towards the
goals. “If knowledge production occurs along existing disciplinary lines, we risk losing the relationships
that are so important to understanding the legitimacy and potential of the SDGs” ([
5
], p. 5). Making use
of existing knowledge and research is an essential prerequisite for producing further knowledge.
Mapping existing research on the SDGs can be a first step to achieve this goal considering sustainable
development. Research that directly refers to the SDGs facilitates knowledge sharing on the goals
as it is easier to identify relevant work. However, it should be noted that this study only analyzes
a comparably small amount of articles at the meta-level, as we focus on articles explicitly mentioning
the SDGs. With other queries, further research items relevant to the goals are available, but here the
focus is on articles directly addressing them. Thereby comparisons can be made to existing approaches.
Some argue that a reclassification of academic fields is necessary if the SDGs are taken seriously,
whereby academics are required to operate across disciplines [
6
]. Similarly, Education for Sustainable
Development (ESD) requires interdisciplinary approaches [
7
]. Cooperation among different countries
is another crucial aspect of collaboration that is necessary for achieving progress towards the SDGs,
especially when considering the global scope of the goals. For example, North-South collaboration
Sustainability 2020,12, 4461 3 of 14
can be beneficial for knowledge sharing; in particular, countries with limited funding possibilities for
research can benefit from potential financial resources resulting from collaborations [8].
With this article, we aim at presenting an overview on research directly addressing the SDGs and
thus facilitating knowledge sharing among countries and academic fields. The following section will
provide relevant literature for this article and the corresponding analysis. After that, the methodological
approach is described, followed by a presentation of the results. Finally, the results will be discussed
in the last section.
2. Literature Review
There are some qualitative as well as quantitative studies examining research regarding
sustainable development. In order to assess research trends with regard to the SDGs,
Salvia et al. [4]
conducted a survey with 266 experts from different countries. The survey aimed at identifying those
SDGs that are addressed by the experts. In North America, the most mentioned goals were—in
descending order - SDG 11, 13, 15 and 4, whereas European experts concentrated on SDGs 4, 11, 12
and 13. In contrast, SDGs 13, 4, 11 and 15 were predominant in Asia.
Another approach was used by Körfgen et al. [
9
]. They also directly addressed the 17 SDGs,
but created a complex search string for each of the SDGs using an iterative approach in order to
quantitatively analyze research with regard to each SDG. These search strings were then used to
identify relevant publications from 13 Austrian universities in order to assess the focus areas of SDGs
related research in Austria. By far the strongest representation among the SDGs is SDG 4 on quality
education. Overall, social and economic goals seem to be better represented than environmental goals
due to this study.
There are some further quantitative bibliometric studies aiming at mapping research regarding
sustainable development in general or the SDGs in particular, especially with regard to the represented
countries publishing research on sustainable development. A general bibliometric study on international
research regarding sustainable development was performed by Hassan, Haddawy, and Zhu [
10
].
They used a collection of keyword terms addressing sustainable development and its subareas and
performed their query on the Scopus database. Their findings show that overall research on sustainable
development is lead by the United States in terms of publication numbers and citations. With regard
to different subtopics, other countries could be identified as predominant, e.g., climate change (UK),
renewable energy (China) or forestry (Finland).
In contrast to the approach of collecting several keyword terms on the subareas of sustainable
development, Zhu and Hua [
11
] used the phrase “sustainable development” as a search term in the Web
of Science database and analyzed research from 1987 to 2015 by bibliometric means. They assessed
the references, keywords, countries and categories of nearly 60,000 publications. In their study,
most journals of the corresponding articles were located in the US, UK or the Netherlands. Again,
publications from the US were the most predominant in terms of citations, whereas most publications
in the analyzed set were from China.
Similarly, Olawumi and Chan [
12
] analyzed more than 2000 articles from 1991–2016 on sustainable
development embedded in Web of Science Core Collection. Most journals in their study originated
from the US, China, UK and Canada. The main research topics that could be identified were sustainable
urban development, sustainable indicators and impact, water management, environmental assessment,
strategy, public policy and monitoring, cost-benefit analysis, stakeholders’ participation, campus
sustainability at universities and human ecology.
In general, most quantitative bibliometric studies concentrate on analysing documents from
one database such as Scopus or Web of Science. However, the coverage between different databases
can differ tremendously [
13
,
14
]. When using the Web of Science Core Collection, further attention
should be drawn to the corresponding institutional subscriptions used for the analysis, because it
leads to differences in the resulting hits [
15
]. Furthermore, Scopus and Web of Science show
an over-representation of documents from English language journals [
14
,
16
,
17
] and seem to introduce
Sustainability 2020,12, 4461 4 of 14
biases by favouring research in the Natural Sciences, Engineering and Biomedical Research [
14
]. Still,
these databases remain the main multidisciplinary sources for bibliometric analyses.
The above studies analyzed thematic foci of different countries. When analyzing publication
output, international collaboration between the countries is of particular interest. With SDG 17,
the importance of partnerships for achieving progress towards the SDGs is stressed. In general,
international collaboration in science is growing [
18
–
20
]. Some studies analyzed the relation between
international collaboration and research impact, whereby a small positive effect of international
co-authorship on citations could be detected [
21
]. International collaboration further seems to be
associated with international funding [22].
Considering these findings, we analyzed more than 4000 publications from Web of Science Core
Collection and Scopus published between 2015 and 2019, assessing corresponding research areas and
sources, countries and international collaboration, thematic foci as well as funding acknowledgements.
The following section presents the methodological approach.
3. Materials and Methods
In order to analyze research directly addressing the SDGs, two multidisciplinary databases were
used: Scopus and the Web of Science (WoS) Core Collection. As described above, there are disparities in
the amount and type of coverage between these databases, hence we decided to include both databases
in our analysis in order to draw a more complete picture. The queries were performed on 6 November
2019 using the search string “Sustainable Development Goals” as a phrase in the fields TOPIC (WoS)
respectively TITLE-ABS-KEY (Scopus). The search was narrowed to documents with publication years
between 2015–2019 and the document type ‘article’. This time span was used because of the adoption
year of the SDGs in 2015. Regarding the Web of Science Core Collection, it is important to note which
editions are included, due to institutional differences in subscriptions [
15
]. The set used in this analysis
consists of the following collections and coverage time spans.
•SCI-EXPANDED: Science Citation Index Expanded (1945-present)
•SSCI: Social Sciences Citation Index (1956-present)
•A&HCI: Arts & Humanities Citation Index (1975-present)
•ESCI: Emerging Sources Citation Index (2015-present)
The queries resulted in 3943 hits in Scopus as well as 3241 hits in the WoS Core Collection. In each
database, all available metadata, abstract, keyword, funding and authors’ affiliation information
of these documents were downloaded as a CSV-file and processed with the Python programming
language. After cleaning the data, duplicates in the databases were identified and mapped. For some
fields, further data had to be edited. For example, synonyms were merged (e.g., ‘USA’, ‘United States’
and ‘US’ in the affiliation field) and a thesaurus file was created for the keywords (e.g., sustainable
development goal; un sustainable development goals
→
sustainable development goals). A second
thesaurus file was created for mapping the keywords to the SDGs (e.g., health policy
→
good health
and well-being (SDG 3); poverty alleviation
→
no poverty (SDG 1)). For this purpose, the United
Nations’ descriptions, including the particular targets and indicators of each goal were used and
mapped to the keywords manually.
Each database has its own classification system regarding the corresponding research areas of
the articles. For mapping the research areas of the analyzed documents, this article relies on the
suggestions of [
16
]. Five main categories are distinguished, which are based on the classification of the
Web of Science Core Collection [23]. These categories are:
•Arts & Humanities
•Life Sciences and Biomedicine
•Physical Sciences
•Social Sciences
•Technology
Sustainability 2020,12, 4461 5 of 14
For articles from Scopus, a mapping to these five categories was conducted according to [
16
],
whereas the category “Multidisciplinary” remained unaffected. Each article can be dedicated to several
research areas and the assignment is hence not unique.
For analyzing international collaboration, we evaluated the affiliation fields in our dataset.
Following [
18
], a research piece can be considered as international, when at least two different countries
are represented among the authors’ affiliations, while papers with only one affiliation country can be
considered as domestic. For assessing existing funding, we used a dichotomous approach, simply
marking those articles with existing funding information in Scopus or WoS.
The evaluation of the documents was then performed with Python and its modules pandas and
matplotlib. In some cases, some information was missing for the articles (e.g., no keywords or abstract),
so that some analyzes only considered those documents where the corresponding information was
given. Network maps were created with VosViewer 1.16.11, which is a freely available tool for
visualizing networks from bibliometric data, such as authors, journals, co-citations or keywords [24].
4. Results
After mapping duplicates within the hits, 3934 documents remained for the analysis from the
Scopus database, whereas 3237 documents could be analyzed from WoS. From these, 2578 could
be identified in both databases (Figure 1). As a result, 1356 documents were solely dedicated to
Scopus, while 659 articles were only found in WoS. In total, 4593 documents could be used for the
overall analysis.
Figure 1.
Number of articles from 2015–2019 with TOPIC=TITLE-ABS-KEY=“Sustainable Development
Goals” in the databases Scopus and WoS Core Collection.
4.1. Sources and Research Areas
In general, research directly addressing the SDGs in the abstract, title or keywords is constantly
growing since 2015. This is also true with regard to the different research areas (Figure 2). However,
differences can be observed in the absolute numbers of research items per discipline. Overall, the most
prevalent research area is Life Sciences & Biomedicine (2261 articles), followed by Social Sciences
(1960 articles) and Technology (850 articles). In comparison, the categories Physical Sciences as well
as Arts & Humanities are underrepresented with 121 and 110 articles respectively. Furthermore,
49 articles were classified as Multidisciplinary. Note again, that one article can be dedicated to more
than one research are, which is why the sum of the articles in each research area exceeds the number of
all documents (N=4593).
From the 4593 analyzed documents, 1330 articles (29%) acknowledge some kind of funding for the
research, whereby variations could be detected across the research areas: Life Sciences & Biomedicine
report about funding in 38.9% of the articles, Social Sciences in 30.4%, Technology in 34.3%, Arts &
Humanities in 19.1% and Physical Sciences in 53.7% of the research items.
Sustainability 2020,12, 4461 6 of 14
The 4593 analyzed articles were published in 1667 different sources, whereby Sustainability is by
far the most occurring journal with 273 published documents. Noticeably, several open access journals
such as Sustainability,PLOS ONE or BMJ Global Health are among the sources. In total, nearly 45% of
all articles are published under an open access licence.
Figure 2. Number of articles per research area and year.
Figure 3shows the top 15 sources according to the number of articles in descending order.
With 863 publications, these 15 journals make up only 0.9% of all sources but account for 18.8% of all
articles in our initial set. The degree of inequality becomes apparent when looking at the corresponding
Lorenz curve and Gini coefficient (
G=
0.55) for the sources of the analyzed articles (Figure 4). In the
Lorenz curve, the cumulative proportion of journals is plotted against the cumulative proportion of
the total number of articles and thus the degree of inequality is visualized [
25
]. The more the blue
curve deviates from the perfect equality line, the less journals do contribute equally to the number of
articles published. The Gini coefficient (ranging from 0 = perfect equality to 1 = complete inequality)
summarizes the degree of concentration in one number.
Figure 3. Top 15 sources that published articles addressing the SDGs.
Sustainability 2020,12, 4461 7 of 14
Figure 4. Lorenz curve with Gini coefficient for the sources of articles.
4.2. Affiliation Countries and International Collaborations
Taking a look at the countries that belong to the authors’ affiliations, a total of 184 countries
are represented in our study. From the 4593 articles, 1005 were published with at least one author
affiliated with an institution in the United States. This is followed by 822 articles with involvement
from the United Kingdom. The 15 most occurring countries are depicted in Figure 5. Aggregating the
number of publications per continent, however, European countries are involved in 2071 publications,
North America in 1229 and Asia in 1138 publications. Nearly half (2270) of all publications are
domestic articles (only one country among the authors’ affiliations), whereas for 634 documents no
affiliation information was given. The remaining 1689 publications are considered as international
publications (at least two countries among the authors’ affiliations). Most of these (985) were published
by authors from two countries, followed by 341 documents from three countries and 363 articles from
four or more countries. Figure 6shows the amount of domestic and international articles by research
area. Documents without affiliation information are excluded. With 69% the highest relative share
of domestic articles was detected in Arts & Humanities, while the lowest share of domestic articles
comes from Physical Sciences (51%). Because of the different amount of publications per research areas,
these variations are not significant.
Figure 5. Top 15 countries that are involved in articles addressing the SDGs.
Sustainability 2020,12, 4461 8 of 14
Figure 6. Share of domestic and international publications by research area.
International articles tend to have more funding available than domestic articles. From the 2269
domestic articles, 610 (27%) acknowledge some funding, whereas from the 1690 international articles,
714 (42%) report about funding. Calculating Spearman’s
ρ
between the number of countries involved
in an article and the relative share of funded articles, a significant positive correlation can be detected
(
ρ=
0.86,
p<
0.01), indicating that the more countries are involved in an article, the more it is likely to
get funding.
Concentrating on the countries that are involved in at least 50 publications (35 countries)
and calculating the share of international publications per country for these, the highest share of
international articles is published by Belgium (93%), Kenya (87%), France (86%), Denmark and
Switzerland (both 85%) as well as Bangladesh (83%). In contrast, low shares of international
publications were calculated for the Russian Federation (42%), India (46%) and Nigeria (47%).
Figure 7visualizes four clusters based on the co-occurrence of countries according to the authors’
affiliations. Included are all countries that are involved in at least 50 publications. This condition
is true for 35 countries. The size of a country’s frame reflects the number of publications in our
set that are associated to the country. The first cluster consists of eleven European countries and
in addition Ethiopia, Ghana, Iran and the Russian Federation. The second cluster consists of nine
Asian countries, Australia and New Zealand. Cluster 3 and 4 entail the United States and the United
Kingdom, respectively, the two most occurring countries. Whereas the United Kingdom can be linked
especially to the African countries Kenya, Nigeria and South Africa, strong links were found with the
United States and Brazil, Canada, India, Mexico as well as Switzerland.
Sustainability 2020,12, 4461 9 of 14
Figure 7.
Clusters of 35 countries with at least 50 associated publications based on co-occurrence of
authors’ affiliation countries, map created with VosViewer 1.16.11.
4.3. Thematic Foci
Depending on our query, documents in this study contain the phrase “Sustainable Development
Goals" in its title, abstract or the assigned keywords. From the documents in the initial set, 1169 articles
contained the phrase among their keywords, 3471 in the abstract and 738 in its title. Analysing the
corresponding keywords of all documents in more detail, we can discover five main keyword clusters
(Figure 8). Our search phrase Sustainable Development Goals is naturally at the center of the keyword
map and forms a cluster with the keywords Agenda 2030 and United Nations which together describe
the agenda in general. Furthermore, these keywords are associated with the thematic foci human rights,
inequalities,migration, and poverty.
The biggest cluster around the general keyword sustainable development shows a focus on
health-related topics, e.g., hygiene,maternal health, and mortality, thus representing SDG 3. Further
keywords in this cluster are linked to water and sanitation (SDG 6) as well as keywords showing a focus
on African countries according to keyword co-occurrences. These keywords are further linked to the
Millennium Development Goals - the predecessor of the SDGs.
Another cluster around the general keyword sustainable development shows a focus on environmental
sustainability, represented by keywords such as energy (SDG 7), climate change (SDG 13), land degradation
(SDG 15) and biodiversity (SDGs 14 and 15), but also economic growth (SDG 8), as well as agriculture and
nutrition (SDG 2).
The other two clusters have their focus on governance,policy,innovation and infrastructure in
relation to urbanization and the countries Bangladesh,South Africa and China, respective the keywords
education (SDG 4), Education for Sustainable Development, as well as implementation,monitoring and
indicators,partnerships (SDG 17) and participation.
Sustainability 2020,12, 4461 10 of 14
Figure 8.
Clusters of author keywords based on co-occurrence of the keywords with at least
20 occurrences (71 keywords), map created with VosViewer 1.16.11.
Considering the mapped SDGs on the keywords for each country, thematic foci for the countries
in terms of keyword occurrences can be discovered. Research from the 15 countries with the highest
research output directly addressing the SDGs in particular concentrates on SDG 3, good health and
well-being which has already been detected as a main keyword in Figure 8. Except for Italy, keywords
reflecting this SDG are among the two most widely addressed SDGs (Table 2).
Table 2. Focal SDGs per Country.
Country Focus on SDGs
United States 3 (health), 6 (water)
United Kingdom 3 (health), 10 (inequalities)
Australia 3 (health), 6 (water)
Germany 13 (climate), 3 (health)
Canada 3 (health), 6 (water)
Switzerland 3 (health), 10 (inequalities)
South Africa 3 (health), 10 (inequalities)
Netherlands 3 (health), 6 (water)
China 13 (climate), 3 (health)
India 3 (health), 10 (inequalities)
Spain 4 (education), 3 (health)
Sweden 3 (health), 6 (water)
Italy 2 (hunger), 13 (climate)
Japan 13 (climate), 3 (health)
France 3 (health), 13 (climate)
Sustainability 2020,12, 4461 11 of 14
Aggregating the countries to the corresponding continents (and Oceania), again SDG 3 is the
most occurring SDG for all continents (Table 3). Furthermore, SDG 6 is among the top 5 SDGs for all
continents. In contrast, SDG 10 is mainly addressed in all continents except for South America. SDG 4
is a focus in Europe and South America, and partly Africa. SDGs 1, 2, 5, 7, 8, 9, 11, 12, 14, 15 are not
among the top 5 occurring themes in all continents according to the used keywords.
Table 3. Focal SDGs per Continent.
Continent Focus on SDGs
Africa 3 (health), 6 (water), 10 (inequalities), 4 (education), 17 (partnerships)
Asia 3 (health), 13 (climate), 6 (water), 10 (inequalities), 17 (partnerships)
Europe 3 (health), 4 (education), 13 (climate), 6 (water), 10 (inequalities)
North America 3 (health), 6 (water), 10 (inequalities), 13 (climate), 16 (peace)
Oceania 3 (health), 13 (climate), 10 (inequalities), 6 (water), 17 (partnerships)
South America 3 (health), 4 (education), 13 (climate), 17 (partnerships), 6 (water)
5. Discussion
With the Sustainable Development Goals, the United Nations adopted an ambitious agenda
aiming at ending poverty, protecting the planet and ensuring prosperity for all. Partnerships for
the goals (SDG 17) as well as international and interdisciplinary research are regarded as crucial for
achieving progress towards the SDGs. In this paper, we assessed the current status of research on
the 17 goals by analyzing research articles directly addressing the SDGs. For this purpose we used
scientometric means, more precisely, we downloaded metadata and content-related information for
more than 4500 publications from the WoS Core Collection and Scopus published between 2015 and
2019. The resulting dataset was analyzed with regard to the associated sources and research areas,
affiliation countries and international collaboration as well as thematic foci.
The comparably small amount of research articles directly addressing the SDGs available in
the databases WoS and Scopus shows that many authors do not yet link their research to the goals.
For facilitating knowledge sharing on the SDGs, it would be useful to raise awareness by directly
referring to them. Of course, it is not necessary to mention the SDGs for achieving progress towards
them in general. Still, revealing research articles connected to the goals and making these more
visible and more comfortable to find would contribute to establishing collaboration and partnerships,
thus directly strengthen progress towards SDG 17. This gap becomes especially evident with the
sophisticated search strings other researchers had to apply for mapping SDG related research, e.g., as
presented in [9].
In our study, the most prevalent source for articles addressing the SDGs is the journal Sustainability
located in Switzerland. According to [
12
], most journals publishing research on sustainable development
are located in the US, China, UK and Canada when referring to the WoS Core Collection. In general,
several studies have shown that publications from English-speaking countries as well as English
language journals are over-represented in databases like Scopus or Web of Science [
16
]. This is also true
for research on the SDGs, as confirmed by [
10
]. Similarly, research from English-speaking countries
is predominant in our study. Nearly half of the publications in our dataset are domestic articles,
i.e., articles authored by persons from one country only. Thereby, the share of international articles
varies among research area and country. A positive correlation between the number of involved
countries and the availability of funding acknowledgements could be calculated, which supports
previous research by [22].
In contrast to a general underestimation of the Social Sciences in the databases Scopus and WoS
found in previous studies [
14
], according to our findings this research area is strong regarding research
addressing the SDGs (1960 articles). However, the most prevalent research area in our dataset is Life
Sciences & Biomedicine (2261 articles), which explains the strong thematic focus on health-related
Sustainability 2020,12, 4461 12 of 14
topics detected through the keywords. This research area further seems to benefit most from funding
possibilities according to the funding acknowledgements gathered from WoS and Scopus.
In contrast to the survey by [
4
], we identified other predominant SDGs in our dataset.
In Asia, Europe and North America, the experts of the study by [
4
] commonly referred to SDG
4 (quality education), 11 (sustainable cities and communities) and 13 (climate action), but also SDG
15 (life on land - Asia and North America) and SDG 12 (responsible consumption and production
- Europe). In contrast, research directly referring to the SDGs in particular focuses on SDG 3 (good
health and well-being) in all continents. Further predominant SDGs in research of all continents are
SDG 6 (clean water and sanitation) and SDG 10 (reduced inequalities). The prevalence of SDG 13
as well as SDG 4 in Europe conforms with the study of [
4
]. A strong focus of Austrian universities
on SDG 4 was also detected by [
9
]. Compared to the study of [
12
] some thematic overlaps could be
detected. For example, monitoring sustainable development and according indicators were deemed
relevant in both studies. In contrast, our analysis revealed a strong focus on health-related topics,
which is not a priority according to [12].
This study has some limitations. While most bibliometric studies regarding a specific topic focus
on documents from one database, we consulted two popular databases to get a more complete picture.
Still, Scopus and Web of Science do not cover every research item and especially with regard to the
WoS Core Collection, the coverage depends on institutional subscriptions [
15
]. The coverage between
the databases differs notably, but both show an over-representation of documents from English
language journals [14,16,17]. As we performed our query in November 2019, the records for 2019 are
not complete. Using the same query in April 2020, 350 and 450 further articles are available in the
databases Scopus respectively WoS, which were not considered in our bibliometric analysis. In addition,
analyzing funding acknowledgement has its limitations. While funding acknowledgement is fully
covered for documents published since 2015 in the WoS SSCI, the WoS A&HCI subset is not covered [
26
].
Furthermore, there are differences regarding the availability of funding information between Scopus
and WoS [
27
]. Again, with the use of these two databases we reduced the limitations. The query
strategy used in this study is quite simple. Searching with the phrase “Sustainable Development
Goals” does not include those documents dealing with subtopics of sustainable development that
do not directly refer to the SDGs, but still support progress towards them. We used the approach to
reveal those articles that are already including this phrase in their title, abstract, and keywords, thus
facilitating to identify SDG-related research. We did not include the abbreviation “SDG” in the query,
as it stands for several further scientific concepts, such as “spatial distribution of gradients”.
6. Conclusions
Despite these limitations, this study reveals some interesting insights into current research addressing
the SDGs. The existing thematic foci reveal current research gaps. While SDG 3 is already well represented
in research addressing the SDGs in articles by authors from all countries, other SDGs, such as SDG 1
(no poverty), 5 (gender equality), 11 (sustainable cities and communities) or 16 (peace, justice and
strong institutions) are barely represented in our dataset. This does not mean, that there is no research
supporting these SDGs, but that existing research in these areas does not necessarily refer to the goals
by addressing the SDGs in its title, abstract or keywords. If all research supporting the goals was
directly linked to the SDGs, knowledge sharing could be facilitated and progress towards the goals
would be supported.
In addition, even though transnational cooperation is apparent with nearly 37% of all articles
being co-authored by authors from affiliations of multiple countries, collaboration can still be expanded
in future research on the SDGs. The relatively high share of articles being published open access and
the presence of pure open access journals among the main sources for articles addressing the SDGs
further supports the idea of knowledge and information sharing which is also among the targets
of the SDGs (Target 16.10: “Ensure public access to information and protect fundamental freedoms,
in accordance with national legislation and international agreements” [
28
]). There are also efforts on
Sustainability 2020,12, 4461 13 of 14
identifying the role of open access for the SDGs, e.g., as formulated by the International Federation of
Library Associations and Institutions (https://blogs.ifla.org/lpa/2018/10/24/how-open-access-can-
help-achieve-sustainable-development-goals-sdgs/).
In the future, research could focus on this special role of open access for the SDGs, but also on
other solutions for further facilitating knowledge sharing on the SDGs. The comparable low availability
of articles directly addressing the SDGs, respective the complex queries used by other authors, reveal
that more research is necessary to map SDG-related research adequately, and to facilitate knowledge
sharing thereon. Additionally, practical solutions to broaden the network and foster collaboration
regarding the goals are crucial.
In addition to the mere availability of funding acknowledgments, it would be interesting
to analyze the types of funding bodies, e.g., governmental institutions, commercial enterprises,
or non-profit foundations. That would require a mostly qualitative analysis of the funding texts
available in the databases. This bibliometric overview can serve as a starting point for identifying
current countries, sources and thematic foci in existing research articles addressing the SDGs.
Funding: This research received no external funding.
Acknowledgments:
The author acknowledges the support for publishing open access by the Heinrich Heine
University Düsseldorf.
Conflicts of Interest: The author declares no conflict of interest.
Abbreviations
The following abbreviations are used in this manuscript:
SDGs Sustainable Development Goals
ESD Education for Sustainable Development
WoS Web of Science
SSCI Social Sciences Citation Index
A&HCI Arts & Humanities Citation Index
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