Inbound or outbound? Trade shows or telephone blitz? SEM or email campaigns? Marketers today are spoilt for choice when it comes to sources for lead generation.

But which are the most effective? What is your RoI per lead and more importantly how does it compare with the industry average? In this week’s Insights digests, we have selected 5 presentations that have some hard, cold numbers. Have a read.

For a background on this series, please read the preamble to the first Insights digest.