From Retrieval Strategies to Knowledge Sovereignty: How Global South Research Can Break Free from Dependence on Northern Databases

Search strategy is not a technical issue, but a map of knowledge power

The starting point of any systematic review is a seemingly neutral search strategy. How keywords are chosen, how databases are selected, how language boundaries are drawn, whether grey literature should be included—these decisions may look like methodological minutiae, yet they directly delimit the boundary of “what counts as evidence.”

The systematic review guide published by the University of Reading Library in the UK lists search strategy as the third step and discusses in detail synonym expansion, truncation symbols, field tags, and database adaptation. These operational recommendations are themselves very solid, but in the context of Global South research they expose a deeper structural problem: the production and retrieval of contemporary academic knowledge still depends heavily on a database system and bibliometric rules centered on the Anglophone world.

When a researcher types keywords into Web of Science or PubMed, they are not merely searching the literature; they are entering a cognitive infrastructure jointly built by Northern academic capital, English-language publishing conglomerates, and a particular indexing system. The academic output, local-language research, and informal publications of Global South countries often systematically disappear from evidence synthesis because they are not indexed in these databases.

The boundary of the term list is the boundary of knowledge

The guide emphasizes that a search strategy needs to list synonyms, abbreviations, different spellings, and even singular and plural forms. The original intention of this recommendation is to ensure the comprehensiveness of the search. But in the context of Global South research, the choice of the term list is itself a problem of political economy.

Take agricultural research as an example. The terms “smallholder” or “cash crop,” commonly used in English-language searches, may correspond to completely different conceptual systems in local studies in Francophone West Africa, Lusophone Mozambique, or the Indonesian archipelago. If a search strategy starts only from English keywords, then a large amount of field research published in local languages will be unable to enter the evidence pool. Even if researchers are aware of this, mainstream databases’ coverage rates for non-English literature and abstract translation rates are far from sufficient to support truly multilingual searching.

The difference in “UK/US spellings” mentioned in the guide is only a superficial manifestation of linguistic asymmetry. More fundamentally, many academic journals in Global South countries are not indexed by Scopus or Web of Science, and their research outputs are ignored by default in the “relevant literature” screening of systematic reviews. This is not the negligence of individual researchers, but the structural exclusion of global knowledge infrastructure.

Database selection is cognitive framework selection

The guide recommends that researchers, when determining search sources, consider the databases’ subject coverage, geographic coverage, and language range. This precisely hits a core contradiction in Global South research: the most comprehensive databases are often the most biased toward the North.Web of Science and Scopus have extremely strong coverage of English-language literature and high-impact Northern journals, but their coverage of regional journals, working papers, government reports, and NGO publications from Africa, Latin America, and Southeast Asia is far from sufficient. Although PubMed is essential for global health research, its biomedical-heavy framework often filters out analytical dimensions of particular concern to Southern scholars, such as the social determinants of health, colonial legacies, and structural inequalities.

Recommendations for searching gray literature—including government reports, institutional working papers, and conference papers—theoretically provide a channel for Southern knowledge to enter evidence synthesis. In practice, however, this literature is likewise concentrated in the hands of Northern institutions. World Bank, OECD, and IMF working papers are far easier to retrieve and cite than policy research from other Southern countries. As a result, systematic evidence about the Global South is still largely defined by Northern institutions: which questions are worth studying and what data count as reliable.

Decolonization Clues in Library Guides

It is worth noting that the guide has a dedicated subsection discussing “searching for Global South publications to achieve academic decolonization.” This shows that even at the level of operational library science guides, the asymmetry of knowledge production can no longer be avoided.

The core challenge of decolonizing search is that a large portion of Southern scholarship circulates in local languages, through informal channels, or on regional platforms. If researchers rely only on English keywords and Northern databases, even if they subjectively wish to incorporate Southern perspectives, they have no way to do so at the operational level. Although the AI-assisted synonym generation, MeSH subject heading analysis, and Voyant text-mining tools mentioned in the guide can help expand vocabulary lists, the training data and terminology systems of these tools themselves still lean toward English and Northern academic contexts.

This means that the “comprehensiveness” of a search strategy is a relative concept. Without dedicated regional databases, multilingual vocabularies, and Southern literature indexes, any systematic review claiming to be comprehensive will contain systematic sampling bias.

Emerging Market Research Is Paying the Price for This Bias

Search bias in Global South research is not merely a question of academic methodology. When international investment institutions, development banks, and multinational corporations rely on evidence synthesis based on Northern databases to assess emerging market risk, they are in effect using an incomplete map.

Africa’s manufacturing relocation trends, Southeast Asia’s digital financial penetration rates, the resilience of Latin America’s urban informal economies—high-quality research on these topics exists in large quantities in regional academic networks, local think-tank publications, and unindexed journals. If systematic evidence synthesis relies only on Northern databases, then judgments about emerging market growth potential and sovereign risk will systematically favor those countries and issues that have already been thoroughly studied by international institutions.This is not a hypothesis. Research on global FDI flows has long focused disproportionately on resource extraction and large-scale infrastructure, while research on small and medium-sized enterprises and regional value chains remains severely underdeveloped. This is partly because data on the latter are scattered across local statistical systems and industry reports in the Global South, making them difficult to obtain through mainstream search channels.

The Rise of Global South Knowledge Infrastructure and the Future of Search Strategies

Change is happening, albeit slowly. Regional knowledge infrastructures such as academic cooperation platforms among BRICS countries, African Journals Online, and the Latin American Science Network are accumulating searchable Global South scholarly resources. Some international databases have also begun to expand their coverage of non-English journals. The digital sovereignty agenda has entered policy discussions in countries such as India, Brazil, South Africa, and Indonesia, promoting the independent development of domestic research data and publishing platforms.

For researchers and research institutions, this means that search strategies can no longer be regarded as purely technical operations. A truly comprehensive systematic review search protocol needs to explicitly identify the structural limitations of language coverage, the geographical bias of databases, and sources of grey literature. For investment research and policy analysis focused on emerging markets, this means actively incorporating regional databases, local-language keywords, and Global South academic networks, rather than assuming that search results from Northern databases constitute “global evidence.”

Conclusion: Who Defines Search, Who Defines the Growth Narrative

The center of global growth is shifting toward the South, but knowledge production and retrieval about the Global South remain highly concentrated. The search strategy of a systematic review is a microcosm of this asymmetric structure. When a researcher’s vocabulary, databases, and screening rules are all determined by Northern academic infrastructure, the “evidence” they synthesize can hardly truly reflect the economic realities of the South.

For international investors and macro researchers, understanding this bias is not academic fastidiousness but a prerequisite for risk assessment. If the knowledge base about emerging markets is itself biased, then the capital allocation and long-term growth expectations built upon it need to be re-examined. Building a more balanced search strategy is, in essence, the first step toward building a more reliable growth narrative for the Global South.