| VARIABLES | (1) HS | (2) HM | (3) HL | (4) HI | (5) HS | (6) HM | (7) HL | (8) HI |
| U | 0.0024** | 0.0011* | −1.34e−05 | 0.0009 | 0.0068*** | 0.0045*** | 0.0025 | 0.0066** |
| (0.0011) | (0.0005) | (0.0008) | (0.0015) | (0.0018) | (0.0013) | (0.0018) | (0.0025) | |
| D | 0.0041*** | 0.0021** | 0.0005 | −0.0011 | 0.0057* | 0.0017 | −0.0019 | −0.0087* |
| (0.0013) | (0.0008) | (0.0008) | (0.0018) | (0.0033) | (0.0018) | (0.0019) | (0.0048) | |
| C | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Constant | 0.1230*** | 0.0112* | 0.1100*** | 0.4640*** | 0.1300*** | 0.0297*** | 0.1620*** | 0.4910*** |
| (0.0100) | (0.0059) | (0.0096) | (0.0218) | (0.0142) | (0.0082) | (0.0184) | (0.0354) | |
| Observations | 117,023 | 117,083 | 116,904 | 101,752 | 37,500 | 37,659 | 37,602 | 29,596 |
| R-squared | 0.1290 | 0.1200 | 0.1870 | 0.1990 | 0.1350 | 0.1540 | 0.2310 | 0.2460 |