Table 2. Gravity model OLS regression results.
Variables | Material | Plasma | Device | Diagnostics | Simulation |
---|---|---|---|---|---|
ln(Pm,j) | 0.497*** (0.033) |
0.508*** (0.032) |
0.411*** (0.030) |
0.438*** (0.033) |
0.488*** (0.033) |
ln(Pn,j) | 0.497*** (0.033) |
0.508*** (0.032) |
0.411*** (0.030) |
0.438*** (0.033) |
0.488*** (0.033) |
ln(dmn) | -0.495*** (0.044) |
-0.451*** (0.040) |
-0.464*** (0.042) |
-0.546*** (0.049) |
-0.485*** (0.043) |
cmn,j | -0.133 (0.222) |
-0.911*** (0.284) |
-0.949*** (0.232) |
-0.690*** (0.175) |
-0.027 (0.194) |
Observations | 3518 | 3518 | 3518 | 3518 | 3518 |
R2 | 0.113 | 0.123 | 0.101 | 0.094 | 0.107 |
Standard error is in parenthesis.
Fixed time effects are included.
* p-value < 0.1,
** p-value < 0.05,
*** p-value < 0.01