Table 4.
GMM estimation of knowledge contributed by active users at StackOverflow
| Dependent Variable: Answer posted | ||||
|---|---|---|---|---|
| Robust | ||||
| Model 1 | Model 2 | |||
| Coef. | t-value | Coef. | t-value | |
| Explanatory variables | ||||
| Question Posted | -0.695*** | -73.24 | ||
| Received Comments | 0.302*** | 2184.66 | ||
| Answer Count Received | 0.051*** | 9.54 | ||
| Upvotes | -0.013*** | -896.21 | ||
| Down Votes | 1.291*** | 641.20 | ||
| Favorite Votes | 0.478*** | 806.21 | ||
| Peeve Votes | -0.396*** | -17.18 | ||
| Control Variables | ||||
| Comment Posted | 0.434*** | 18737.96 | 0.034*** | 422.30 |
| View Count | 0.003*** | 61.75 | 0.006*** | 30.87 |
| Bronze Badge | 0.482*** | 637.67 | -0.596*** | -661.54 |
| Silver Badge | 0.587*** | 2255.68 | 0.102*** | 523.92 |
| Gold Badge | -5.723*** | -1797.60 | 0.173*** | 47.51 |
| Reputation | 0.002*** | -4375.28 | 0.008*** | -271.43 |
| Quarterly Dummies | Yes | Yes | Yes | Yes |
| Observations (N) | 13,775 | 13,775 | ||
| AR 1 (p-value) | -4.82(0.000) | -7.13(0.000) | ||
| AR 2 (p-value) | -1.34(0.179) | -0.38(0.705) | ||
| Hansen test (p-value) | 298.33(1.00) | 297.21(1.00) | ||
*** p < .01, ** p < .05, * p < .1