2 INTRODUCTION User generated content (UGC) is the cornerstone of social and online marketing. However, the key challenge for online marketers to leverage UGC is to encourage users to generate more quality content. To overcome this burden, practitioners have started to use video game concepts such as badges, leaderboard, and points to encourage users, under the umbrella of an approach called Ga...

A growing number of students are casting aside the traditional view of work as a means of earning money, preferring to identify themselves more closely with a Particular community, where they can create their own life-style.

This paper examines how a single female's investment in healthy body weight is affected by the quality of single males in her marriage market. A principle concern in estimation is the presence of market-level unobserved heterogeneity that may be correlated with changes in single male quality, measured as earning potential. To address this concern, we employ a differencing strategy that normaliz...