Consumers have a strong desire to share their accomplishments on social media. They post about getting a promotion, completing an online course, finishing a marathon, or donating to charity. Companies also nudge consumers to make such posts. Understanding better people's beliefs about sharing achievement-related information with others is important.

Referral programs are ubiquitous in the marketplace and incentive design is crucial in such programs. Most companies opt for a two-sided design where they reward both the referee and recipients in their referral programs. However, surprisingly little research examines the incentive designs in two-sided programs.