Researchers examined selected Norwegian municipalities affected by the voting-age change in 2011. They found a reduction in net operating surplus of approximately NOK 600 (€60) per person in those local governments.

The effect was more pronounced in municipalities with less division among political parties, a larger share of left-leaning representatives and a higher share of young representatives. The authors relate the result to earlier individual-level evidence that younger people tend to place less weight on future outcomes and take more risks.