William Meckling is an influential economist best known for his contributions to agency theory, particularly in relation to the principal-agent problem. His work emphasizes the conflicts that arise when one party (the agent) is tasked with making decisions on behalf of another party (the principal), often leading to issues of misaligned incentives and information asymmetry. Meckling's insights into these dynamics have had a profound impact on fields like corporate governance, contract theory, and organizational behavior.