Lorenzo offered Ida a job at his new law firm. In anticipation, Ida quit her job at Mega Firm, bought a new computer, and invested in a new set of law books. Shortly before her anticipated first day at Lorenzo's firm, Lorenzo informed Ida that he had changed his mind, and no longer wanted her to work for him. Ida may recover under the doctrine of .

Promissory estoppel

Explanation:

Promissory estoppel is a legal principle that allows a promise to be enforced based on legislation, even if no formal agreement has been established between the parties involved. This principle is applicable, mainly when the non-fulfillment of the promise generates negative consequences in one of the parties, as is the case between Lorenzo and Ida.

When the promissory estoppel is established, the prosecutors involved in the case are prevented from arguing that the pledge was unofficial and did not apply to any legislation.