Most retailers today sell products through an online channel in addition to traditional physical stores. We investigate how such a multi-channel or omni-channel retailer should decide the number and size of physical stores. We show that a higher return rate for online purchases can incentivize...

Two-sided platforms rely on their recommendation algorithms to help visitors successfully find a match. However, on platforms such as VolunteerMatch - which has facilitated millions of connections between volunteers and nonprofits - a sizable fraction of website traffic arrives directly to a...