The interviews were conducted in February-March 2005
in The Netherlands and in the Rhine-Ruhr area in
Germany, where Dutch tomatoes from this chain are sold.
Prior to the interviews, pre-test interviews were conducted
with three interviewees external to the chain in order to test
the questionnaire. In the tomato chain in total 12
interviewees were interviewed. Seven growers agreed to
participate in the interview. One breeder and one
wholesaler took part in the interview, because there is
only one of each in the chain. Finally, one manager of one
distribution center and two managers of two supermarkets
were interviewed.