"Since assistive devices for persons with mental disabilities are relatively new, there are many question marks. One question relates to the price of devices. Yet another involves the extent to which the user benefits from the use of devices.
Therefore, we (Swedish Institute of Assistive Technology – SIAT) asked economist Åke Dahlberg, whose doctoral thesis dealt with cost–benefit analyses, for help. Åke Dahlberg was first commissioned to review the literature in the field as a basis for later execution of model calculations, not least for decision–makers."
The pdf document is a brief version of Åke Dahlberg’s work.