@misc{orgprints66,
           title = {Demand for Organic Products ?
Specification of Functions to be Estimated},
          author = {Lars G\r arn Hansen},
            year = {2001},
             url = {http://orgprints.org/66/},
        abstract = {The purpose of this note is to present and discuss possible specifications of the demand
system to be estimated with the GfK panel and survey data. We present potential problems/criteria
and evaluate different possible specifications with regard to these.}
}