State Space Models

All state space models are written and estimated in the R programming language. The models are available here with instructions and R procedures for manipulating the models here here.

Wednesday, June 17, 2026

Switzerland (1960-2100) Population Forecasts

 



June 14, 2026 Switzerland Rejects Measure to Cap Its Population at 10 Million NY Times. The referendum was about limiting migration after the number of residents rose by more than a quarter since 2000, but it was framed around affordability and sustainability.

The Population Cap (solid red line in the graphic above) proposed for Switzerland will not automatically be reached by any of my forecasting models, although the stable Business-as-Usual (BAU) model (see below) might eventually reach a steady state at a level lower than 10 Million. 

The best forecast (using the Akaike Information Criterion) is the CH_LM (Late Modern) model driven by Western Europe (the dashed red line in the graphic above, state-space model presented below).


Notes

Wikipedia Links

AIC Statistics



CH_LM Western Europe Input



CH_LM BAU Model



CH_LM US Input