The geography and channels of diffusion at the world's technology frontier
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Cambridge
National Bureau of Economic Research
2001.
|
| Cyfres: | NBER working paper series
no.8150 |
| Pynciau: |