One instructive exercise is to compare this stick-figure model to the rich incentive issues in the case study on Lincoln Electric (Fast and Berg, 1975). For example, Lincoln pays not only piece rates, akin to the contracts w = s + by analyzed here, but also subjective bonuses. A second useful exercise is to compare this model to the compelling examples of failed (or at least agonizing) incentive plans recounted by Kerr (1975), in his classic article on “Rewarding A, While Hoping for B.” To begin to address both Lincoln Electric and Kerr’s examples, we turn next to the “multi-task” agency model, which emphasizes “get what you pay for” problems.