ABSTRACT Knowledge spillovers are an important source of economic growth. In this study, we identify a mechanism through which knowledge spillovers occur among plants in the Chilean manufacturing industry. A plant-level production function is estimated with the absorptive-capacity hypothesis, that is, employment of skilled workers is a key channel through which knowledge is transmitted across plants. Results show that a plant's productivity from spillovers increases with its skill intensity, which is measured by the share of skilled workers in total employment. We also find that plants in a region with a large knowledge stock increase their skill intensity to benefit more from spillovers. Our results suggest that an increase in regional knowledge stock is the most effective policy to improve a plant's productivity. However, policies that encourage a plant to employ high skill-intensive production also enhance its productivity.