Social capital and regional innovation: evidence from private firms in the US
研究了美国县域社会资本与私营企业创新数量、质量和新颖性的正相关关系，发现金融资本匮乏地区该效应更强，且社会资本对研发投入有互补作用，并存在跨县溢出效应。
In this study we investigate whether and to what extent social capital may affect regional innovation by focusing on private firms in the United States. We document that regional social capital is positively associated with the quantity, quality and novelty of county-level innovation by private firms. In addition, we find that the positive relation between social capital and regional innovation is more prominent in counties with a lower supply of financial capital. We also report that social capital is complementary to investments in research and development to produce inventive outcomes in local areas. Using a spatial Durbin model, we provide evidence that regional social capital has significant spillover effects in boosting the innovation activities of neighbouring counties.