共 35 条
[21]
Haegeland T., 2007, Reports, V47
[24]
Innovating firms and aggregate innovation
[J].
JOURNAL OF POLITICAL ECONOMY,
2004, 112 (05)
:986-1018
[27]
An Empirical Model of Growth Through Product Innovation
[J].
ECONOMETRICA,
2008, 76 (06)
:1317-1373