| na | Coef. | Std. Err. | t | P > |t| | [95% Conf. | Interval] |
| gr | 18546.3700 | 2037.8000 | 9.10 | 0.000 | 14532.2800 | 22560.4600 |
| nb | 586.7191 | 311.4113 | 1.88 | 0.061 | −26.7036 | 1200.1420 |
| incr | 2.2459 | 0.6689 | 3.36 | 0.001 | 0.9282 | 3.5635 |
| avc | 103.2083 | 9.6229 | 10.73 | 0.000 | 84.2530 | 122.1636 |
| yb | −44.8631 | 9.2635 | −4.84 | 0.000 | −63.1104 | −26.6158 |
| ef | −0.0083 | 0.0023 | −3.68 | 0.000 | −0.0128 | −0.0039 |
| _cons | −130056.4000 | 36448.8400 | −3.57 | 0.000 | −201853.9000 | −58258.9200 |
| sigma_u | 48398.5610 |
|
|
|
|
|
| sigma_e | 84607.1930 |
|
|
|
|
|
| rho | 0.2465 | (fraction of variance due to u_i) | ||||
| F test that all u_i = 0: F (30, 242) = 2.14 | Prob > F = 0.0009 | |||||