The linear Coe-Helpman model only applies to quantifying the spillover effect of embodied knowledge from trade in goods. By developing the linear Coe-Helpman model into a nonlinear spatial Durbin model, this paper draws on panel data covering 31 Chinese provinces from 1992 to 2011 to compare the intangible knowledge spillover effects between trade in goods and services trade. The result shows that the primary spillover of the imported non-embodied knowledge both in trade in goods and services trade fails to promote the local total factor produc...
