TABLE 4.
Estimates of the demand by products types (generic vs. originator).
| Dependent variable: log(Q) | ||||||
|---|---|---|---|---|---|---|
| Anti-tumor | CVD | Antimicrobial | ||||
| Generic | Originator | Generic | Originator | Generic | Originator | |
| L1.logQ | 0.255*** | 0.189*** | 0.0294 | 0.175*** | 0.293*** | 0.141*** |
| (0.0534) | (0.0620) | (0.0318) | (0.0439) | (0.0209) | (0.0406) | |
| L2.logQ | 0.0891** | 0.266** | −0.0304 | 0.0745* | 0.0420*** | −0.0232 |
| (0.0447) | (0.104) | (0.0283) | (0.0433) | (0.0120) | (0.0423) | |
| L3.logQ | 0.202*** | 0.219** | −0.000156 | 0.0216 | 0.0385*** | 0.0628 |
| (0.0546) | (0.105) | (0.0281) | (0.0547) | (0.0116) | (0.0430) | |
| L4.logQ | 0.0207 | 0.00282 | 0.0557** | 0.159** | 0.0579*** | 0.123*** |
| (0.0549) | (0.0658) | (0.0273) | (0.0671) | (0.0114) | (0.0289) | |
| Log(P) | −0.275** | −0.247*** | −1.479*** | −1.473*** | −0.779*** | −0.839*** |
| (0.107) | (0.0907) | (0.165) | (0.188) | (0.0439) | (0.0808) | |
| 0.0947* | −0.0331 | 0.356*** | −0.398 | −0.0146 | 0.196*** | |
| (0.0572) | (0.0388) | (0.132) | (0.327) | (0.0687) | (0.0593) | |
| 0.229*** | 0.800*** | 0.607*** | 0.634*** | 0.288*** | 0.575*** | |
| (0.0502) | (0.183) | (0.0998) | (0.195) | (0.0323) | (0.0498) | |
| Log(M_size) | 0.388*** | 0.654*** | 0.674*** | 0.905*** | 0.580*** | 0.499*** |
| (0.0485) | (0.0577) | (0.0400) | (0.0546) | (0.0298) | (0.0331) | |
| UEBMI Class A | −0.623 | 1.313* | −5.722*** | −2.483*** | −3.063*** | −0.330 |
| (0.385) | (0.722) | (0.679) | (0.534) | (0.261) | (0.546) | |
| q1 | 0.0291 | −0.276* | −1.154*** | −1.547*** | 0.0510** | 0.199*** |
| (0.0944) | (0.142) | (0.0996) | (0.270) | (0.0256) | (0.0627) | |
| q2 | 0.0215 | −0.0928 | −2.022*** | −0.591** | 0.0407 | 0.140** |
| (0.0891) | (0.149) | (0.0977) | (0.286) | (0.0275) | (0.0606) | |
| q3 | −0.121 | −0.427*** | −1.203*** | −1.349*** | 0.117*** | 0.0554 |
| (0.0786) | (0.153) | (0.109) | (0.293) | (0.0245) | (0.0595) | |
| Quarter | Yes | Yes | Yes | Yes | Yes | Yes |
| Constant | 3.140*** | 0.810 | 12.32*** | 11.19*** | 7.706*** | 6.248*** |
| (0.602) | (0.916) | (0.751) | (0.981) | (0.476) | (0.602) | |
| AR2 | 0.5699 | 0.4929 | 0.6269 | 0.2836 | 0.4822 | 0.2849 |
| Hansen test | 0.9865 | 1.0000 | 0.6699 | 1.0000 | 0.1173 | 1.0000 |
| Observations | 363 | 99 | 706 | 109 | 3,575 | 290 |
Note: UEBMI, Urban Employees’ Basic Medical Insurance. ***p < 0.01, **p < 0.05, and *p < 0.1.