Skip to main content
. 2021 Aug 2;12:688069. doi: 10.3389/fphar.2021.688069

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)
Log(PcGM) 0.0947* −0.0331 0.356*** −0.398 −0.0146 0.196***
(0.0572) (0.0388) (0.132) (0.327) (0.0687) (0.0593)
Log(PcTM) 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.