It is necessary to grasp and utilize consumer's needs for firms to improve existing products and developing new products. Especially, collaboration with consumers for product innovation is indispensable. On the other hand, social media has been spreading all over the world. Network communities...

Pay What You Want (PWYW) can be an attractive marketing strategy to price discriminate between fair-minded and selfish customers, to fully penetrate a market without giving away the product for free, and to undercut competitors that use posted prices. We report on laboratory experiments that...