There is a lack of knowledge about methods for valuing health intervention-related costs and monetary benefits in the education and criminal justice sectors, also known as ‘inter-sectoral costs and benefits’ (ICBs). The objective of this study was to develop methods for obtaining unit prices for the valuation of ICBs.

By conducting an exploratory literature study and expert interviews, several generic methods were developed. The methods' feasibility was assessed through application in the Netherlands. Results were validated in an expert meeting, which was attended by policy makers, public health experts, health economists and Health Technology Assessment (HTA) experts, and discussed at several international conferences and symposia.

The study resulted in four methods, including the opportunity cost method and valuation using available unit prices, self-constructed unit prices or hourly labor costs.

The methods developed can be used internationally and are valuable for the broad international field of HTA.