中文摘要：

对农业技术外包生产率效应的发生机制进行理论分析，以北京市生猪良种外包为例进行验证。主要得出以下结论：农业技术外包程度、外包技术质量、配套技术服务情况和外包关系连续性等4方面因素通过影响农户的技术投入量和技术效果影响其生产率；对北京市养猪户生猪良种外包的实证分析验证了上述结论。基于此，应重点考虑将促进农业技术外包作为我国目前提升农业生产率、实现农业现代化发展的重要路径之一，并通过提升外包技术质量、鼓励接包方提供配套技术服务和增强农业技术外包关系连续性等途径促进农业技术外包生产率效应的充分发挥。

英文摘要：

This paper analyzes the generation mechanism of productivity effect of agricultural technology outsourcing and takes an empirical test based on questionnaire survey data. The conclusions are as follows： the degree of out- sourcing, technical quality, matching technology service and continuity of the relationship affect farmers＇ incentives for technology and then affect their productivity. The empirical analysis proves the conclusion. The policy implication is that we should take measures to promote agricultural technology outsourcing, improve the quality of technology, encourage outsource to provide matching technology service and strengthen the outsourcing relationship continuity.