Production Contracts and Productivity in the U.S. Hog Sector
衡量了生产合同对美国生猪养殖场部分要素生产率和全要素生产率的影响，发现合同生产显著提高了要素生产率，代表了相对于独立生产的技术进步。
Abstract This article measures the impact of contracting on partial and total factor productivity and the production technology of U.S. hog operations. A sample selection model accounts for the fact that unobservable variables may be correlated with both the operators' decision to contract and farm productivity. Results indicate that the use of production contracts is associated with a substantial increase in factor productivity, and represents a technological improvement over independent production. Results also identify determinants of farmers' decisions to contract and other factors influencing farm productivity.