HEAD TO HEAD
Bulgaria vs Serbia
Verdict
Bulgaria holds a 55–45 advantage over Serbia on the Relative Advantage Index.
The margin is driven by economic size (GDP) (56% of the combined total, $113bn) and logistics & power projection (64% of the combined total, 9). Serbia leads on military spending.
1 factor — nuclear warheads — could not be scored because the figure is unpublished for at least one side. Those factors are excluded and the remaining weights renormalised, never substituted.
Factor by factor
| Factor | Bulgaria | Share | Serbia | Weight |
|---|---|---|---|---|
Military spending SIPRI Milex | $2.6bn | 48%52% | $2.8bn | 33% |
Economic size (GDP) World Bank WDI | $113bn | 56%44% | $90.1bn | 27% |
Active personnel COW NMC | 37.0k | 57%43% | 28.0k | 20% |
Logistics & power projection OurAirports | 9 | 64%36% | 5 | 20% |
Shares are each side's portion of the combined total for that factor. Weights are renormalised across the factors both sides publish — see the methodology. Data read 2026-10-22.
