The principal methods of investigation are a pre-piloted anonymous survey of taxpayers, drawn with the co-operation of the Inland Revenue, and an interview survey of professional tax advisers.

During 1997 to 1998, an interview survey was conducted in the Paschim Kasuha VDC adjacent to the east of the reserve to investigate the extent of park-people conflict.

It collects data from birth and death records, medical records, interview surveys and through direct physical exams and laboratory testing.

These two components were studied by an interview survey; the was composed of one third unemployed and two thirds employed members of the two localities.

Brown and Levin (1974) undertook an interview survey of workers to test their views about the impact of different levels of tax on their willingness to undertake overtime.

We collect data from birth and death records, medical records, interview surveys, and through direct physical examinations and laboratory testing.

Many of these conclusions were reinforced by the results of an interview survey of 229 children aged 8 to 17 in Ann Arbor, Mich.

In each of those years, about 7,000 families from around the country provided information each quarter on their spending habits in the interview survey.

When interview surveys are carried out, however, the researcher must actually make contact, on a face-to-face basis, with the people being studied.

When we discuss the use of self-completed questionnaires this will be a special point of detail, but it can be a major problem in interview surveys also.