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Published on Mar 31, 2010
The hall test can be used for bulky or confidential stimuli, they are low-cost. The mall intercept limits expenses associated with in-home work. The panel allows opinions to be tracked over time and avoids response rate problems, panel data is a rich source for secondary data. Omnibus surveys are available in most countries of the world and offer an extremely low cost for researchers. http://www.oxfordtextbooks.co.uk/orc/...