Regional Specialization and Technical Leapfrogging
研究技术突破后区域失去技术领先地位的条件，发现上下游产业关联导致集聚，新技术因不兼容更易在低要素价格的新地点建立，且新旧技术可能共存。
This paper investigates circumstances where a region loses its technological leadership after some major technological breakthrough. Input‐output linkages between firms in a Cournot upstream industry and a perfectly competitive downstream industry create forces for agglomeration in particular locations, driving up prices of immobile factors. A new technology that is incompatible with the old will not benefit from these linkages and so is more likely to be established in locations with little existing industry due to lower factor prices. Furthermore, in some circumstances the old and new technologies may coexist.