Batch cycle-001. Model 0.1.0, graph 0.2.0, parameters 0.1.0. 100 simulations, seeds 1 to 100; probes on 20. 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 20 rounds from 2026 under the mirror a peer method, with stochastic events, 100 times. Its capability index moved from 11.69 to a median of 13.04 (+1.35), with 90 per cent of simulations between 12.01 and 13.69 [experiment_objectives].
Starting position
In 2026 the nation ranks 30 on the index against the frozen field, holds 0 of nine domains at Tier 1 and has a tier rank of 33. Its base income is 386 credits a year, calibrated so that its 2026 position is affordable with headroom for investment.
What was decided
A simulation spent a median of 1,970 credits on moves. The five groups that took most were Quantum Technologies (partner, 98 credits, 5.0 per cent); Internal Security & Order (buy, 81 credits, 4.2 per cent); Justice System & Fundamental Rights (build, 79 credits, 4.1 per cent); Regulatory Governance & Strategic Controls (build, 78 credits, 4.0 per cent); Semiconductors & Advanced Computing (buy, 76 credits, 3.9 per cent) [experiment_decisions_by_group]. By mode: build 40 per cent, buy 33 per cent, partner 27 per cent [experiment_decisions_by_group]. Concentration of spending (HHI) had a median of 0.030, and the most repeated action appeared in 25 per cent of rounds.
The leading domain by period: rounds 1 to 5, Human Capital; rounds 6 to 10, Human Capital; rounds 11 to 15, Governance & Integrity; rounds 16 to 20, Governance & Integrity [experiment_spend_by_period].
The method's chosen action was within 5 per cent of its best alternative in 92 per cent of moves and ahead by more than 25 per cent in 0 per cent [experiment_decision_margins].
What the world did
A median simulation saw 2 shocks and 1 upside events. The most damaging per firing were S09 (9 firings in 9 simulations, −30.9 points each); S10 (3 firings in 3 simulations, −30.3 points each); S05 (8 firings in 8 simulations, −27.7 points each) [experiment_shocks]. Upside events fired 100 times across all simulations [experiment_shocks].
The groups that lost most to shocks, per simulation: Fiscal Capacity & Public Finance −1.08; Information Environment & Strategic Communication −0.94; Digital & Services Trade −0.90; Trade Facilitation & Logistics −0.88 [experiment_shock_damage_by_group].
The edges that carried most change through the graph, per simulation: Semiconductors & Advanced Computing to Artificial Intelligence (+0.89 points); Technical & Vocational Skills to Advanced Manufacturing (+0.40 points); Fiscal Capacity & Public Finance to Social Infrastructure (+0.28 points) [experiment_propagation_by_edge].
Where it ended
At 2046 the median rank is 22 (5th to 95th percentile 21 to 29), the median count of Tier 1 domains 0 (0 to 0) and the median tier rank 27; the resilient score, the mean score sum over simulations, is 937 [experiment_objectives].
Why
Without shocks the index ends +0.805 higher on average, so the shocks cost about 0.805 index points [experiment_probe_attribution].
Holding instead of following this method changes the index by −1.833: 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 −0.017 and −0.011, for example 2046 buy Semiconductors & Advanced Computing (21 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 +0.439 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: 4 tiers (100 simulations above 2).
retired_words (warn): e3-bra-mirror-peer/report.md: 'simulations' 1 time(s), first near line 39; use 'simulations'.
The simulation furthest from the median (seed 33) ends −1.85 from it, with 7 shocks and 0 upside events [experiment_outlier_simulations].
Comparison
Against the hold experiment for the same nation (e3-bra-hold), the median index is +1.80 points apart, the median rank 22 against 34, and Tier 1 domains 0 against 0 [experiment_against_hold].
No backcast comparison: this experiment does not start from a historical position [experiment_against_history].