Purpose: As the provision of public services in many advanced welfare states has increasingly come to be marked by competition, social enterprises have actively been encouraged by governments to become involved in the delivery of public services. While the evaluation of complex public health...

The open-ended and payment scale approaches to eliciting willingness to pay (WTP) valuations are compared. Use of the payment scale led to a higher response rate, a higher rate of completion of the WTP question, higher mean and median WTP values, a stronger association between WTP and ability to...