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Formal Bilateral Influence Capacity

The Formal Bilateral Influence Capacity Index measures the capacity for influence between pairs of states across economic, political, and security relationships. It is part of the Pardee Institute's Diplometrics program, which builds datasets to measure international relationships that are often discussed qualitatively but are difficult to compare systematically. This index helps users study relational power, dependence, geopolitical leverage, and spheres of influence across the international system.

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Index at a glance

Measures
Formal bilateral influence capacity, or relational power, between states
Unit of Analysis
Country-pair / dyad-year
Geographic coverage
All pairs of states
Time coverage
1960–present 
Dimensions
Economic, political, and security influence capacity
Access
Public
Related publication(s)
See here.
Parent program
Diplometrics
Definitions
Formal
State-sanctioned, state-sponsored, or publicly acknowledged forms of influence capacity, such as diplomatic exchange, arms transfers, and goods trade. The index does not measure covert activity or policymakers’ willingness to use influence.
Bilateral
Country-to-country relationships. Users can analyze many bilateral relationships together to study larger patterns, including possible spheres of influence.
Influence
Relational power: one country’s capacity to affect another country’s choices or constraints.
Capacity
The material basis for possible influence. FBIC measures capacity, not whether a government chooses to act on that capacity in a specific case.

What the index measures

The FBIC Index measures the capacity one state has to influence another through formal, publicly acknowledged relationships. It combines indicators across economic, political, and security dimensions to estimate bilateral influence capacity between country pairs. Users can examine individual relationships, compare regional patterns, or study broader networks of influence across the international system.

How this index can be used

Power in the international system is not only about what a country possesses internally. It also depends on relationships: trade ties, diplomatic connections, security links, and patterns of dependence. FBIC gives users a structured way to compare those relationships over time and examine how influence capacity is distributed across countries, regions, and networks.

How the data are built

Trade and other economic connections that shape bilateral dependence and interaction.
Diplomatic exchange, shared institutional ties, and other formal political connections.
Military, arms, or security-related ties included in the FBIC methodology.
FBIC combines measures of bandwidth and dependence to estimate influence capacity between country pairs. The full variable list, coding rules, and calculation methods should live in the codebook.

Access and citation

Use the FBIC Index data to compare formal influence capacity between country pairs over time. The codebook provides variable definitions, source notes, and index construction details.

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Help support a global community working toward a more knowable future

Pardee’s open tools, research, and training resources support students, researchers, policymakers, and practitioners around the world. Your gift helps keep that work accessible and strengthens the public research infrastructure behind it.

Give to Pardee

Stay connected with Pardee

Follow Pardee research, publications, events, and tools that help people reason more clearly about possible futures.

Subscribe

Contact us

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