下面是文章名称：
1、bounding the effects of R&D: An investigation using matched establishment -firm data
2、gone but not  forgotten :labor flows,knowledge spillovers,and enduring social capital
3、urban agglomeration：knowledge spillovers and product diversity
4、invariance of expected utilities  in logit  models
5、optimal preservation and pricing of nature public lands in general equilibrium
6、does spatial concentration foster economic growth empirical evidence on EU regions
7|、the economic implications of learning by doing
8、optimal growth with irreversible investment in a ramsey model
9、R&D spillovers and the geography of innovation and  production  
10、knowledge spillover and the geography of innovation
11、knowledge spillover and the geography of innovation ，in handbook of urban and regional economics :cities  and  geographys"


12|、does the  knowledge spillover theory of entrepreneurship hold for regions
13、the production recipes approach to modelling technology innovation ：an application to learning by doing
14、a spatial and temporal model of foreign direct investment in the uS
15、A dominotheory of the grgionalism