This paper studies career spillovers across workers, which arise in firms with limited promotion opportunities. We exploit a 2011 Italian pension reform that unexpectedly tightened eligibility criteria for the public pension, leading to sudden, substantial, and heterogeneous retirement delays....

The scalability of a marketplace depends on the operations of the marketplace platform as well as its sellers' cost structures and capacities. When fixed costs of entry are high, sellers with small capacities may be deterred from entering the market because of their inability to leverage...