E-surveys cramped: not enough E-addresses

Many trade publishers, at least in the U.S., have e-mail addresses for fewer than half of their readers, according to an article in Media Business. Many have valid e-mail addresses for only 20 or 30 per cent of their records. This can cause some concerns about validity of results in what is now a headlong trend towards online or e-mail reader surveys. The savings that are possible by online