I've been getting a couple of calls a day- and they never leave a voicemail. I recently registered for a free email newsletter from Institutional Investor, so it is probably them.
I had been receiving this call several times per week until I finally answered it. The "pitch" was for a free subscription to BIOTECHNICS [sp?]. I refused repeatedly, and in the process I surmised that the call was routed from an off-shore (probably India) concern that was working for a trade subscription-type magazine. This is appears to jibe with John NYC comment of 7 Nov 2007.
I get the same one at least 2-3 times a week at my office. If you subscribed to any of a number of free publications they'll call you continuously with offers. If you unsubscribe to anything they'll keep calling you and persisting. I'm trying to find a number to get my info off of the list, as when they call and I say I'm not interested it turns into an argument.
Ditto Jimmy. The same people have been bugging me and arguing with me for at least 2 years. I politely turn them down. Now I hang up immediately. They actually have very fine specific-industry journals/magazines. I just want to read them, buy stuff from their advertisers and not have them phone me ever again.