PAPER PLAINE

Polar codes are used in 5G networks to transmit data reliably over wireless channels. Traditional decoders are fast but have performance limits; neural network decoders can do better but were a black box. This work removes the guesswork by mathematically proving how neural decoders perform and how to build them properly, enabling engineers to design faster, more reliable wireless systems with confidence.

Norway's electricity traders, grid operators, and energy companies rely on accurate price forecasts to make buying and selling decisions worth millions of euros daily. The old models trained on pre-crisis data were giving them false confidence in their predictions. This research provides updated benchmarks that work across all five zones, and shows traders which models and feature combinations to trust—and critically, when those models are likely to fail. The finding that simpler models work just as well in routine conditions could save companies from overcomplicating their systems, while the warning about stressed regimes gives decision makers a concrete signal for when to add extra caution to their bets.

Policymakers trying to firewall their economies from global financial shocks need to know which transmission routes matter most in each type of crisis. Trade restrictions might help in some scenarios but miss the real danger in others. This framework reveals which channel to target, potentially saving governments from deploying expensive or ineffective crisis responses. The method also surfaces when the evidence is genuinely uncertain—transparency the researchers say is missing from most contagion research.

States and cities compete fiercely to attract top talent through tax breaks and subsidies, betting that star inventors will boost local innovation. This research shows those bets are grounded in real effects — but also reveals a hidden cost: tax-driven clustering means inventive activity ends up in the wrong places, leaving other regions less innovative than they'd naturally be. Understanding these spillovers could help policymakers design smarter incentives that benefit entire regions rather than just chasing individual winners.

This reshapes how we think about monetary policy and economic stability. It suggests that tying currency to gold doesn't eliminate inflationary pressure—it redirects it toward savers and creditors at the expense of borrowers and workers. During deflationary periods, farms and businesses carrying fixed debts face mounting real obligations even as revenues shrink, which may explain why the 1873–1896 era sparked widespread farmer unrest and political upheaval despite falling prices.