| Name of variables | Sources |
| TSI | WIODs, China Statistical Yearbook |
| INO_I | China Science and Technology Statistical Yearbook |
| INO_M | China Science and Technology Statistical Yearbook |
| INO_A | China High-tech Statistical Yearbook |
| INO_U | China Industry Statistical Yearbook |
| KL | China Industry Statistical Yearbook |
| OP | China Industry Statistical Yearbook |
| PG | China Industry Statistical Yearbook |