Tenant-right, or a tenant's right to sell his holding, was one of the
most puzzling institutions of nineteenth-century Irish land tenure. Hi
storians have argued that the institution reflects the tenants' assert
ions of a proprietary interest in the land, an assertion often backed
up by threats and violence. In this article we argue that landlords re
spected tenant-right because they could profit from the institution. O
ur model reflects comments by contemporaries and explains that tenant-
right functioned as a bond against nonpayment of rent and was part of
a rational landlord's income-maximizing strategy.