Dutch politicians' attitudes towards Cost-Benefit Analysis

•26 Dutch politicians were interviewed about their attitudes towards the use of Cost-Benefit Analysis.•Dutch politicians' attitudes towards CBA are positive on the condition that CBAs are carried out in an impartial way.•Politicians criticize the use of CBA for killing political debates.•Politicians' attitude towards CBA does not seem to vary across the left-right political axis.•Politicians suggest several solutions to improve their attitude towards Cost-Benefit Analysis.

In this study Dutch politicians were interviewed to derive their attitudes towards the use of Cost-Benefit Analysis (CBA) in the appraisal of transport projects. Dutch politicians' attitudes towards CBA are positive on the condition that CBAs are carried out in an impartial way. According to politicians CBA improves the planning process, serves as a countervailing power and produces a structured list of all the positive and negative effects of a project, amongst other things. Politicians criticize the use of CBA for killing political debates. Politicians were also asked to mention any solutions that they feel would improve their attitude towards CBA. Solutions suggested by politicians predominantly focus on: 1) ensuring that all effects that are covered in the CBA are scrutinized in an impartial way; 2) increasing the awareness and recognition of the elements of the political trade-off that are not covered by a CBA to diminish the probability that politicians will use CBA to kill a political debate.