Ecommerce Links: February 2013

February may be the shortest month, but we weren't short on great blog posts from around the web. Here are 10 you shouldn't miss.

• Do you know the hidden risks of qualitative research such as usability testing? Chris Goward illustrates (literally, see below) how quantitative research provides a hedge.

• Marketers love acronyms like Germans love David Hasselhoff. Discover how to make a landing page that C.O.N.V.E.R.T.S.

• I'll tell you something Germans don't like -- ecommerce cartels. German anti-trust officials are calling for looser restrictions on Amazon Marketplace pricing, which currently demand sellers not sell through any channels at lower pricing than the 'Zon. Should other countries follow suit, that could take a big chunk out of Amazon's long tail.

• Mobile devices are getting really mobile - like automobile. Could Kindle be coming to your car?

• Let's face it, Google Analytics is not perfect data. Why, and what can you do about it?

• Ready to finally get your hands dirty with conversion optimization testing? Rich Page's The Essential Guide for Website Testing Tool Success is a good primer for you.

• Do you carry products with various URLs for its attributes (color, model, size, version) and are worried about duplicate content? Adam Audette shares some tips on SEO for product variations (video below):

• Pagination is another usability and SEO concern, check out UX Movement's post Avoid the pains of pagination (including advice whether or not you should use infinite scrolling).

• Keeping on the topic of usability, Baymard Institute has some tips on why you should use single input fields in mobile forms.
  • Marketing Experiments graciously shares its value proposition product value spreadsheet tool...FREE! (How's that for a value proposition?)
  • Google+ finally jumps in the social sign on pool. Marketing Pilgrim breaks down all the features Google+ has that Twitter and Facebook Connect don't.
  • Now this is what I call cross-channel - a British retailer allows customers to return online shoe purchases at convenience stores and gas stations.