Path: utzoo!utgpu!CUVMA!SWL-L
Date:	Fri, 23 Feb 90 12:41:55 EST
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From:	postmaster@CUVMB.CC.COLUMBIA.EDU
Subject:      Determining Listening Audience Size
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To:	UofToronto LAN redistribution <SWL-L@UTORGPU.uucp>
Message-ID: <90Feb24.070212est.57352@ugw.utcs.utoronto.ca>
Newsgroups: bitnet.swl-l
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Approved: devnull@gpu.utcs.toronto.edu

I've always wondered how a radio station (shortwave, or local AM/FM)
determines the size of its listening audience.  I guess the amount of mail
received is one indication (one needs to then assume some proportion of the
listeners typically send mail...e.g., 1%) but how reliable can that be?
I've assumed that local stations may hire some pollster to do some survey
of people in the listening area, but can that work for shortwave stations?
Anyone out there know the facts?

- Jim Liuzzo