This is the Technical Appendix to the report Borderless Welfare State: The consequences of immigration for public finances.
The appendix explains the method used in the current report. This facilitates understanding and review.
The conclusion of the report is severe. Continuing immigration with its current size and cost structure will put increasing pressure on public finances. Curtailment of the welfare state and/or immigration will then be inevitable.
The appendix enlarges the possibility of replication of the calculations. The authors hope this promotes the periodic actualization of the report.