There are often "gains from sharing" underutilized goods with others. People routinely share tools, media, gear, electronics, toys, space, and vehicles with relatives, friends, and neighbors, and the internet is opening up new opportunities to share them with strangers. Drawing on the work of...

While increasingly popular in many domains crowdfunding remains largely un-derresearched and little is known about the best way to encourage participation. In a field experiment we vary suggested amounts and test different wordings for a campaign to finance a club good - an institute's summer...