Bibliometrics

Science Mapping & Systematic-Bibliometric Review Services

Beyond who cites whom lies the question of what a field is about—its themes, how they have evolved, and where research is heading. Science mapping answers this through keyword and thematic analysis, and pairs with systematic review to produce the rigorous hybrid reviews leading journals now expect. MAS Research delivers both.

Science mapping uses bibliometric data to chart the thematic structure and development of a research field—through keyword co-occurrence, thematic mapping, thematic evolution over time, and research-trend analysis. Combined with a systematic literature review (a structured, protocol-driven search and synthesis), it produces a hybrid “systematic + bibliometric” review that pairs a quantitative map of the field with an in-depth reading of its content.

Keyword co-occurrence & themes Thematic evolution & trends Science mapping (VOSviewer, Biblioshiny) Hybrid systematic + bibliometric reviews

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Thematic map motor/basic niche/emerging

What science mapping does

Where citation analysis asks who influences whom, science mapping asks what a field is about—its topics, how they relate, how they have changed, and where research momentum lies. It works primarily from the words of the literature. Keyword co-occurrence analysis examines which terms appear together across a corpus, building a map of the field’s conceptual structure: the clusters of co-occurring keywords are its themes.

From this foundation come richer views. Thematic mapping positions those themes on two dimensions—centrality (how connected and relevant a theme is to the field) and density (how developed and internally coherent it is)—sorting them into motor themes (central and developed), niche themes (developed but peripheral), basic themes (central but underdeveloped), and emerging or declining themes. Thematic evolution adds the time dimension, tracing how themes appear, merge, split, and fade across successive periods—showing a field’s intellectual trajectory. And research-trend analysis identifies rising and waning topics, helping locate where a field is heading. Together these turn a body of literature into a legible map of its content and direction.

Hybrid systematic + bibliometric reviews

Science mapping gives breadth—a quantitative overview of an entire literature—but not depth: it shows the shape of the forest, not the content of individual trees. A systematic literature review provides the depth: a structured, protocol-driven process (transparent search, explicit inclusion criteria, and systematic extraction, reported in line with guidance such as PRISMA where applicable) that reads and synthesises the selected studies in detail.

The two are powerfully complementary, which is why the hybrid “systematic + bibliometric” review has become a respected and increasingly expected format in management and business journals. Bibliometrics maps the field’s structure, influence, and themes objectively and at scale; the systematic component then reads the key works in depth to explain why the map looks as it does and what the findings actually say. We design and deliver these hybrid reviews end to end—and, where the question is about synthesising effect sizes rather than structure, connect to meta-analysis. One principle holds throughout: the search and selection must be transparent and reproducible, because a review’s credibility rests on how its literature was assembled.

At a glance

Three lenses on a literature

Science mapping, systematic review, and meta-analysis compared
	Science mapping	Systematic review	Meta-analysis
Shows	Structure, themes, trends	What the studies say, in depth	A pooled quantitative effect
Scale	Whole field (breadth)	Selected studies (depth)	Comparable studies
Based on	Metadata (keywords, citations)	Full-text reading	Reported effect sizes
Output	Maps & thematic structure	Narrative synthesis	Summary effect & moderators
Combine as	Hybrid systematic + bibliometric review		+ where effects are synthesisable

Methodology

Mapping and reviewing credibly

As with all bibliometrics, the data groundwork is decisive—a transparent database and search strategy and careful cleaning, documented reproducibly. Science mapping adds its own care points. Keyword analysis depends heavily on term harmonisation: synonyms, singular/plural variants, and spelling differences must be reconciled, or the same concept splinters across the map and distorts the themes. The choice between author keywords, indexed keywords, or terms extracted from titles and abstracts is consequential and should be deliberate. And the time slices for thematic evolution must be chosen sensibly, since arbitrary period boundaries can manufacture or hide apparent shifts.

Interpretation requires the most judgement. A thematic map and an evolution diagram are aids to understanding, not conclusions in themselves: clusters and quadrant placements depend on parameters and thresholds, and an algorithmically detected theme is not automatically a meaningful one. We interpret the maps with domain knowledge rather than reading them literally, and in a hybrid review we use the in-depth reading to validate and explain what the bibliometrics suggest. For the systematic component, the standard disciplines apply—an explicit protocol, reproducible search, clear inclusion/exclusion, and transparent reporting—so the whole review can be trusted and replicated.

A thematic map is an aid to interpretation, not a conclusion. Clusters and quadrants depend on term harmonisation, parameters, and time-slice choices—an algorithmic theme is not automatically a real one. We harmonise terms carefully, make choices deliberately, and interpret maps with domain knowledge, validated by in-depth reading.

Software

We deliver science mapping and hybrid reviews in the field’s established tools—bibliometrix/Biblioshiny in R for thematic maps, thematic evolution, and trend analysis, and VOSviewer and CiteSpace for keyword co-occurrence mapping—with documented search, term harmonisation, and parameter choices, alongside a transparent systematic-review protocol where a hybrid review is produced.

How we work

How we deliver a science-mapping or hybrid review

This work sits within our wider bibliometrics practice and pairs with citation analysis—so the map is built on sound data and read with judgement.

We start from the field or question and design a transparent, reproducible search and database strategy. We extract and clean the data—harmonising keywords and terms carefully—and run the science-mapping analyses: keyword co-occurrence, thematic maps, thematic evolution across sensible time slices, and trend analysis. For a hybrid review, we then apply a systematic-review protocol to read and synthesise the key works in depth, using that reading to validate and explain the bibliometric picture.

Reporting documents the search, database, and cleaning, the mapping choices and parameters, the thematic structure and evolution, and—for a hybrid review—the systematic protocol and synthesis, with clear visualisations and honest interpretation.

You receive the science-mapping results and visualisations (keyword, thematic, and evolution maps; trend analysis), and—for a hybrid review—the full systematic + bibliometric review with its protocol, synthesis, and a research agenda, plus documentation of search and cleaning for reproducibility and reproducible analytical files or code (where appropriate and permitted).

Where we apply it

Science mapping across Management & Allied Studies

Charting a field’s themes and trajectory is valuable across every discipline—and hybrid reviews are increasingly expected in top journals.

Review Articles & Research Agendas

Hybrid systematic + bibliometric reviews that map a field, synthesise its content, and set a future research agenda—a high-value publication format.

Theses & Dissertations

Opening chapters that establish the thematic structure, evolution, and gaps of a research area rigorously and visually.

Management & Business

Mapping themes and trends across management, marketing, strategy, and operations literatures.

Economics & Finance

Charting the thematic development and emerging fronts of economics and finance research.

Emerging & Interdisciplinary Fields

Making sense of fast-moving, cross-disciplinary areas where themes form and shift rapidly.

Research Strategy & Policy

Identifying research trends and gaps to inform institutional research strategy and funding priorities.

FAQ

Science mapping & reviews: common questions

What is science mapping?

Science mapping uses bibliometric data to chart the thematic structure and development of a research field—mainly through keyword co-occurrence analysis, which clusters co-occurring terms into themes, plus thematic mapping, thematic evolution over time, and research-trend analysis. It reveals what a field is about, how its themes relate, how they have changed, and where research is heading, complementing citation analysis, which focuses on influence.

What is a thematic map?

A thematic map is a strategic diagram that positions a field’s themes on two dimensions: centrality (how relevant and connected a theme is to the field) and density (how developed and internally coherent it is). This sorts themes into four quadrants—motor themes (central and developed), niche themes (developed but peripheral), basic themes (central but underdeveloped), and emerging or declining themes—giving an at-a-glance view of a field’s structure. The placements depend on parameters and should be interpreted with domain knowledge.

What is a systematic + bibliometric (hybrid) review?

It combines two complementary approaches: a bibliometric analysis that maps the field’s structure, influence, and themes quantitatively and at scale, and a systematic literature review that reads and synthesises the key works in depth following a transparent protocol. The bibliometrics shows the shape of the field objectively; the systematic reading explains why the map looks as it does and what the studies actually say. This hybrid format is increasingly expected in leading management and business journals.

How is thematic evolution analysed?

By dividing the corpus into successive time periods and tracking how themes appear, grow, merge, split, and fade across them—showing the field’s intellectual trajectory. The choice of time slices matters: arbitrary period boundaries can create or obscure apparent shifts, so they are chosen to reflect meaningful stages in the field and reported transparently. The result is a flow diagram of how the field’s themes have developed over time.

How is this different from a meta-analysis?

They answer different questions. Science mapping and systematic review describe the structure and content of a literature—its themes, influence, and what studies say. A meta-analysis statistically pools the quantitative findings (effect sizes) of comparable studies into a summary effect. Mapping and systematic review suit broad questions about a field; meta-analysis suits a focused question where effects can be synthesised. They are complementary, and a review can map a field while a meta-analysis quantifies a specific relationship within it.

Why does keyword harmonisation matter?

Because keyword analysis is only as good as the consistency of the terms. If synonyms, singular and plural forms, acronyms, and spelling variants are not reconciled, the same concept splinters into several nodes, fragmenting themes and distorting the map. Term harmonisation—deciding which keywords to use and merging equivalents—is therefore an essential, deliberate step, not a formality, and we document the choices made so the mapping is reproducible.

Mapping a field or planning a review?

Whether you need a thematic map of a literature, an analysis of how a field is evolving, or a full hybrid systematic + bibliometric review, we deliver it on sound, documented data—with maps read through domain knowledge, not taken at face value.

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