Variables

Model 1

Model 2

Model 3

R & D human resource input

0.5013**

0.5012**

0.3432**

R & D funding input

0.2516

0.2560

0.2880

Popularization funding input

0.2472

0.2638

−0.4800

Cost of project research

−0.0209

0.7580

Cost of project research* Popularization funding input

0.2270***

R2

0.9458

0.9459

0.9851

Adjust-R2

0.9334

0.9262

0.9777