Every national leader, scored across up to eight dimensions of tenure contribution — from governance and economy to politics and crisis response. Compare current form against the legacy they'll leave behind.
SourceTenure record + derivedMethodWeighted averageConfMedium✓ ReconstructableⓘLegacy Rating is the completed-tenure rating derived from sourced leadership dimensions and the recorded conditions of that tenure — on the published scale a score near 60 means the country broadly matched the benchmark trajectory over the mandate. Anything unsourced shows as no data. Full weights on the Methodology page.
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Strongest on governance — sharpest weakness economy.
Briefing
The story
Ivan Kostov served as Prime Minister of Bulgaria. Ivan Kostov holds a moderate Legacy Rating of 64 out of 100. Their standout dimension is Governance (75/100).
The data & sources
The Legacy Rating of 64 is a derived blend of Ivan Kostov's leadership dimensions, each computed from sourced public inputs — none estimated. Diplomatic Conduct — no country-level data; shown as "No data" rather than inferred. Governing-stability conditions score 64/100, renormalised over WGI, V-Dem and UCDP.
The risk read
For country-risk purposes, Ivan Kostov's tenure reads as moderately stable: governing-stability conditions score 64/100. For the full opportunity, market-pulse and resilience read, see Bulgaria's nation page.
The strategic read
Governing conditions: stability 64/100. The sharpest institutional vulnerability is Economy (48/100).
Crisis
Exposure
—/ 100
No data
Response
—/ 100
No data
No sourced crisis signal. The World Bank GDP, UCDP battle-death and WGI political-stability series that drive this score don't cover this leader's mandate years.
Leadership Radar
Tenure Contribution
Uneven profile — 27-point spread from Governance to Economy.
Country scores are blended with live World Bank data where available. Difficulty reflects the structural challenge of governing this nation — not the leader's individual performance.
Source: World Bank·Method: Unweighted average·✓ Reconstructable
Leadership Archetype
No distinct archetype
Uneven profile — 27-point spread from Governance to Economy. No archetype rule matches that shape. This is a reading of the sourced stats — not a data gap.
SourceDerivedMethodRule-based classificationConfDeterministic✓ ReconstructableⓘArchetypes are derived automatically from the leadership stat profile — not hand-assigned. "No distinct archetype" means no classification rule matched; profile shape is assessed separately from the best-to-worst spread. A leader lacking enough sourced stats reads as "No data". A secondary archetype is added only when a stat scores exceptionally high.
Political Legacy
Legacy Rating
64
Assessment
MixedDerivedDerived from the published Legacy Rating band — ≥84 Transformational · 72–83 Lasting · 60–71 Mixed · 42–59 Contested · <42 Negative.
Years Served
4
Peak Strengths
Governance75
Relative Weaknesses
Economy48
Post-Office Metrics
Macro Tailwind/Headwind Adjustment
—
External conditions during tenure
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Key questions
Who is Ivan Kostov?
Ivan Kostov is a former Prime Minister of Bulgaria.
How is Ivan Kostov rated on NationsHelm?
Ivan Kostov holds a moderate Legacy Rating of 64 out of 100. It is a derived blend of sourced leadership dimensions — governance, communication, diplomacy and others — never an estimate.
What are Ivan Kostov's strengths and weaknesses?
Ivan Kostov's strongest leadership dimension is Governance (75/100); the weakest is Economy (48/100), ranked from the leadership radar.
Data coverage:107 Sourced·85 Derived|Scores refreshed: 2026-08-24·snap-20260824-c9f25cd0|Methodology:Reconstructable|Cite:How to cite
Spot an error?
Politics
63
Crisis Response
—
Vision
—
Communication
—
Institutional Integrity
66
Source: World Bank + derived·Method: Contribution·✓ ReconstructableⓘEach dimension measures change under the leader relative to global trends — how the indicator moved over their tenure, net of the world's move over the same window — not the country's absolute level. A score near 60 means performance broadly matched the benchmark trajectory; above = improved the country's standing, below = declined. Governance / Economy / Politics / Institutional Integrity from World Bank WGI, WDI and V-Dem trajectories; Vision from the country's innovation rank (WIPO patents + UNESCO tertiary), former leaders only (patents lag ~3 years); Crisis Response (World Bank + UCDP + WGI, an absolute response-quality scale) and Communication (GDELT) from tenure signals; Diplomacy (Diplomatic Conduct) is active-only. A tenure under six months, or an indicator whose series hasn't reached the term, shows as no data. Full model on the Methodology page.
Stewardship
Inherited-strength lens · separate from the rating
—
Governance
—
Politics
—
Integrity
—
Innovation
—
0 of 4 groups eligible and sourced
Source: World Bank WGI + V-Dem + derived·Method: Stewardship·✓ ReconstructableⓘMeasures whether strong institutions inherited at the start of the tenure were preserved, improved or eroded. It does not reward the leader for inheriting a strong country. A metric qualifies only when the inherited baseline was at least 75 on its normalized scale; the score is the world-net change over the tenure on the single public scale (60 = preserved relative to global movement). Requires two or more eligible sourced groups, the six-month tenure floor and a post-tenure-start observation — otherwise No data, never a zero. Weights mirror the current-form groups (gov 0.17 · pol 0.15 · int 0.08 · vis 0.09), renormalized over what is eligible and sourced.
Strengths & Weaknesses
Top Strengths
Governance75
State management and policy execution capacity
Key Weaknesses
Economy48
Economic stewardship, growth, and macro stability
Source: Derived·Method: Ranked by stat value·✓ ReconstructableⓘUp to 5 strengths (dimensions scoring 70+) and 5 weaknesses (scoring 57 or below), ranked from the leadership radar. Dimensions in the 58–69 benchmark band appear in neither column. Descriptions are fixed per dimension and don't vary by country. Dimensions without a sourced signal show as no data. Full model on the Methodology page.
ⓘ
Country scores are the unweighted average of scored World Bank indicators — the same model used on the nation's own page. Difficulty reflects structural constraints on governing this nation, independent of the current leader.
Ivan Kostov Legacy Rating: 64/100 — Prime Minister, Bulgaria (1997–2001) | NationsHelm