Many street-level bureaucrats (such as caseworkers) have the dual task of helping some clients, while sanctioning others. We develop a model of such a street-level bureaucracy and study the implications of its personnel policy on the self-selection and allocation decisions of agents who differ...

Civil servants have a reputation for being lazy. However, people's personal experiences with civil servants frequently run counter to this stereotype. We develop a model of an economy in which workers differ in laziness and in public service motivation, and characterise optimal incentive...

This paper describes the origins of the logistic function, its adoption in bio-assay, and its wider acceptance in statistics. Its roots spread far back to the early 19th century; the survival of the term logistic and the wide application of the device have been determined decisively by the...