Here are some useful links on testing short vs long copy pages:
- Marketing Experiments – good real world example of split testing long and short landing pages – http://www.marketingexperiments.com/improving-website-conversion/sticky-landing-pages.html
- SEOMOZ Landing page competition – http://www.seomoz.org/blog/announcing-the-seomoz-landing-page-competition-winner
- Marketing Sherpa’s Landing Page book – if you want to fork over $500 – http://www.sherpastore.com/RevisedLandingPageHB.html
- Video on landing page layouts – http://www.acquisio.com/blog/landing-page-wireframe-design-for-ppc/
- Landing Page Optimization – The Book http://www.amazon.com/Landing-Page-Optimization-Definitive-Conversions/dp/0470174625/






