Some of the most interesting things happening in 2013 was around recommender engines. won an Emmy for their video recommender and Netflix algorithms got mainstream coverage with every mention of the movie Sharknado. Also, Arjan Haring presented some interesting thoughts about social proof in framing of recommendations. Another interesting trend is more insights into the effects of user generated content like reviews and online comments. Sinan Aral demonstrated how reviewers are shaped by social contagion and the trend of shutting off comments is (thankfully) growing. On the less exciting side, last year I hoped for more insights into online loyalty and stickiness this year, but little surfaced in that regards. The only thing I noticed was an article by[…]