Regional knowledge spillovers: a firm-based analysis of non-linear effects
使用葡萄牙制造业企业面板数据，发现区域知识溢出对生产率的影响在不同行业间差异显著且呈非线性，这对制定更精准的区域政策至关重要。
This paper revisits the question of the role of knowledge externalities in firm productivity. It also addresses the overlooked issue of a plausible non-linear effect and differences among industries. Using a panel of Portuguese manufacturing firms, it finds that regional knowledge spillovers differ substantially across industries and they are non-linear, which is critical issue to promoting more assertive regional policies.