Technical documentation of the BEFINN model, g2020

Statistics Norway produces national population projections biennially. Work on model development, as well as substantive research relating to model assumptions, is undertaken in the intervening years.

The purpose of this documentation is to describe the maintenance and practical applications of the BEFINN model. In addition to the work implemented in this model, extensive external work is required in order to produce assumptions for fertility, mortality and international migration – with resulting files used as input in the BEFINN model. The external work is documented in the main report accompanying the g2020 national population projections and is therefore not discussed in this document.

A schematic overview of the model, including the programs and the input and output files, is included in Appendix A. Appendix B comprises a “cook book” detailing the order in which the various programs needs to be run. These brief descriptive summaries should be regularly consulted during the production of a new national population projection.