Batch cycle-003. Model 0.2.0, graph 0.2.0, parameters 0.1.1. 30 simulations, seeds 1 to 30; probes on 10. Every figure is a distribution over simulations of a structural model with seed parameter values; it shows what the model implies under these settings, not what will happen. Other nations are frozen at their 2026 ratings. No reconstructed historical data is used in this experiment.
Headline
Brazil played 30 rounds from 1996 under the scripted method, with scripted events, 30 times. Its capability index moved from 11.43 to a median of 11.55 (+0.13), with 90 per cent of simulations between 11.54 and 11.56 [experiment_objectives].
Starting position
In 1996 the nation ranks 34 on the index against the frozen field, holds 0 of nine domains at Tier 1 and has a tier rank of 22. Its base income is 425 credits a year, calibrated so that its 2026 position is affordable with headroom for investment.
What was decided
A simulation spent a median of 2,030 credits on moves. The five groups that took most were Energy Infrastructure (build, 183 credits, 9.0 per cent); Foundational Education (build, 175 credits, 8.6 per cent); Transport Infrastructure (build, 175 credits, 8.6 per cent); Population Health (build, 175 credits, 8.6 per cent); Diplomatic Statecraft & Global Networks (build, 158 credits, 7.8 per cent) [experiment_decisions_by_group]. By mode: build 75 per cent, buy 19 per cent, partner 6 per cent [experiment_decisions_by_group]. Concentration of spending (HHI) had a median of 0.070, and the most repeated action appeared in 30 per cent of rounds.
The leading domain by period: rounds 1 to 5, Financial Strength; rounds 6 to 10, Strategic Infrastructure; rounds 11 to 15, Strategic Infrastructure; rounds 16 to 20, Strategic Infrastructure; rounds 21 to 25, Strategic Infrastructure; rounds 26 to 30, Production & Innovation [experiment_spend_by_period].
What the world did
A median simulation saw 4 shocks and 0 upside events. The most damaging per firing were S10 (30 firings in 30 simulations, −36.9 points each); S02 (60 firings in 30 simulations, −14.1 points each); S07 (30 firings in 30 simulations, −11.7 points each) [experiment_shocks].
The groups that lost most to shocks, per simulation: Trade Facilitation & Logistics −2.57; Fiscal Capacity & Public Finance −2.41; Labour & Employment −2.38; Investment Attraction & Projection −2.27 [experiment_shock_damage_by_group].
The edges that carried most change through the graph, per simulation: Foundational Education to Advanced Education (+1.19 points); Transport Infrastructure to Trade Facilitation & Logistics (+0.84 points); Fiscal Capacity & Public Finance to Social Infrastructure (+0.39 points) [experiment_propagation_by_edge].
Where it ended
At 2026 the median rank is 31 (5th to 95th percentile 31 to 31), the median count of Tier 1 domains 2 (2 to 3) and the median tier rank 11; the resilient score, the mean score sum over simulations, is 839 [experiment_objectives].
Tier 1 probability changed most in: human capital (0 to 100 per cent of simulations); information and influence (0 to 37 per cent of simulations); strategic infrastructure (0 to 100 per cent of simulations) [experiment_tiers_by_round].
Why
Without shocks the index ends +1.045 higher on average, so the shocks cost about 1.045 index points [experiment_probe_attribution].
Holding instead of following this method changes the index by −1.567: that is the method's worth against doing nothing [experiment_probe_attribution].
Removing any single one of the five largest actions changes the index by between −0.002 and +0.037, for example 2006 build Foundational Education (22 credits) [experiment_probe_attribution]. The largest actions by credits come late, when income is highest, and are rarely the most valuable.
Removing the largest shock of a simulation raises the index by +0.465 on average [experiment_probe_attribution].
The replay probe reproduces the simulations exactly (index change 0.000000), so the attributions are clean [experiment_probe_attribution].
Surprises
tier_jump (warn): largest gain in one domain within five years: 6 tiers (30 simulations above 2); tiers are reported, not an objective.
retired_words (warn): e4-bra/report.md: 'simulations' 1 time(s), first near line 39; use 'simulations'.
The simulation furthest from the median (seed 18) ends −0.02 from it, with 4 shocks and 0 upside events [experiment_outlier_simulations].
Comparison
This is the baseline (hold) experiment, or there is none for this nation in the batch.
Against history: from a reconstructed index of 11.43 the model ends at 11.55, where the 2026 ratings put it at 11.69. Group scores miss by 1.88 points on average, against 0.91 for assuming nothing changed (skill −1.06); the change in each domain has the right sign in 44 per cent of domains. Furthest below history: trade and investment (−1.44); furthest above: strategic infrastructure (+1.25) [experiment_against_history]. The starting position is reconstructed, so part of the error is the reconstruction's.