The household-based survey has been found to be the most effective means of investigating the child labour phenomenon in all its facets. It does, however, exclude homeless children who live and work on the streets, with no fixed place of usual residence. As a result the data obtained through household surveys did not include information on such children who might have been working on the streets, although the number of such youngsters would be relatively very small in most countries. Nonetheless, since such children are among those who usually encounter the worst situations, a separate survey had to be designed and tested, and is described further in this section.
In the household-based survey, the best rime to visit the sample households was found to be late afternoons or early evenings. While finding an adult respondent was relatively easy in the daytime, there was difficulty contacting the children themselves in the households during the daytime and proxy informants tended to be unreliable, especially concerning certain questions or variables.
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