“…Several studies in other countries have investigated either the cost effectiveness or cost benefit of radon mitigation programmes. Among these are Snihs (1992) (Sweden), Colgan and Gutie´rrez (1995) (Spain), Kennedy and Gray (2001), Coskeran et al (2002), Denman et al (2000), Denman et al (2002), Kennedy et al (2002) (UK), Ford et al (1999), Lin et al (1999) (USA) and Stigum et al (2003) (Norway). These studies use a cost-efficiency or cost-analysis approach, with Colgan and Gutie´rrez (1995) as the only exception.…”