7.1 Introduction
7.2 Hight Education Expansion Policy in China During the Economic Transition Period
7.3 Literature Review
7.3.1 The Channels of the Impact of Higher Education Expansion Policy on the Wages of College Graduates
7.3.2 Previous Empirical Studies on the Issue
7.3.3 Contributions of This Study
7.4 Methodology and Data
7.4.1 Model
7.4.2 Data
7.4.3 Variable Setting
Model 1: DID | Model 2: DDD | |||
---|---|---|---|---|
coef. | S.E. | coef. | S.E. | |
Age 21 | −0.065 | 0.265 | −0.079 | 0.399 |
Age 22 | −0.116 | 0.194 | −0.259 | 0.305 |
Age 23 | −0.110 | 0.206 | −0.237 | 0.324 |
Age 24 | 0.123 | 0.164 | 0.272 | 0.259 |
Age 25 | −0.079 | 0.106 | −0.031 | 0.233 |
Age 26 | −0.015 | 0.125 | 0.610** | 0.271 |
Age 27 | 0.033 | 0.098 | 0.115 | 0.235 |
Age 28 | 0.220** | 0.095 | 0.106 | 0.238 |
Age 29 | 0.033 | 0.087 | 0.274 | 0.227 |
Age 30 | 0.058 | 0.084 | 0.151 | 0.220 |
7.5 Results
7.5.1 The Impact of Higher Education Expansion Policy on the Wage of College Graduates
Panel A | |||
---|---|---|---|
a:2000 | b:2004 | D(b-a) | |
T: Treatment group | 8.685 | 7.584 | −1.101 |
(10.000) | (4.640) | ||
C: Control group | 8.865 | 7.878 | −0.987 |
(9.675) | (5.648) | ||
D(T-C) | −0.180 | −0.294 | −0.114 |
Panel B | |||
---|---|---|---|
a:2000 | b:2006 | D(b-a) | |
T: Treatment group | 8.685 | 8.360 | −0.325 |
(10.000) | (5.256) | ||
C: Control group | 8.865 | 8.649 | −0.216 |
(9.675) | (11.857) | ||
D(T-C) | −0.180 | −0.289 | −0.109 |
Panel C | |||
---|---|---|---|
a:2000 | b:2009 | D(b-a) | |
T: Treatment group | 8.685 | 11.258 | 2.573 |
(10.000) | (7.168) | ||
C: Control group | 8.865 | 14.885 | 6.020 |
(9.675) | (28.312) | ||
D(T-C) | −0.180 | −3.627 | −3.447 |
Panel A: DID method | ||||||
---|---|---|---|---|---|---|
Model 1 | Model 2 | Model 3 | ||||
coef. | S.E. | coef. | S.E. | coef. | S.E. | |
Treatment | 0.146 | 0.455 | 0.386 | 0.445 | 0.096 | 0.203 |
Year | 0.683*** | 0.243 | 0.757*** | 0.219 | 0.586*** | 0.098 |
DID | −0.277 | 0.480 | −0.397 | 0.462 | −0.095 | 0.209 |
Exp. | −0.113 | 0.078 | −0.109 | 0.069 | −0.043 | 0.031 |
Exp-sq. | 0.008 | 0.007 | 0.008 | 0.006 | 0.004 | 0.003 |
Health | −0.006 | 0.028 | −0.007 | 0.013 | ||
Male | 0.087 | 0.163 | 0.121* | 0.070 | ||
Occupation (Clerk) | ||||||
Manager | 0.220 | 0.188 | 0.302*** | 0.080 | ||
Technician | −0.022 | 0.255 | 0.017 | 0.106 | ||
Agriculture | −0.119 | 1.013 | −0.044 | 0.682 | ||
Manufacturing job (H) | −0.240 | 0.369 | −0.156 | 0.155 | ||
Manufacturing job (L) | −0.473 | 0.616 | −0.071 | 0.285 | ||
Service | 0.033 | 0.359 | 0.076 | 0.153 | ||
Others | 0.033 | 0.277 | 0.034 | 0.127 | ||
Regular worker | 0.022 | 0.079 | ||||
Private sector | −0.034 | 0.143 | ||||
Urban | 0.276*** | 0.076 | ||||
Region (East) | ||||||
Central | −0.338*** | 0.103 | ||||
West | −0.289** | 0.129 | ||||
Constants | 2.205 | 0.342 | 2.0124 | 0.378 | 1.792*** | 0.195 |
Inverse Mills ratio | −2.833 | 1.177 | −2.502 | 0.981 | −1.030** | 0.518 |
Observations | 980 | 980 | 980 | |||
Prob > chi2 | 0.0321 | 0.056 | 0.000 |
Panel B: DDD method | ||||||
---|---|---|---|---|---|---|
Model 1 | Model 2 | Model 3 | ||||
coef. | S.E. | coef. | S.E. | coef. | S.E. | |
Treatment | 0.038 | 0.407 | 0.140 | 0.430 | −0.006 | 0.404 |
Year | 0.234 | 0.215 | 0.277 | 0.215 | 0.005 | 0.209 |
College | 0.503 | 0.344 | 0.338 | 0.340 | 0.228 | 0.302 |
Year * College | 0.079 | 0.379 | 0.076 | 0.370 | 0.138 | 0.325 |
Year * Aged 21–25 | 0.113 | 0.489 | 0.128 | 0.524 | 0.234 | 0.475 |
College * Aged 21–25 | −0.116 | 0.875 | 0.063 | 0.910 | −0.011 | 0.846 |
DDD | −0.146 | 1.015 | −0.345 | 1.061 | −0.200 | 0.963 |
Exp. | 0.019 | 0.059 | 0.010 | 0.058 | 0.019 | 0.052 |
Exp-sq. | −0.000 | 0.005 | 0.000 | 0.005 | 0.000 | 0.004 |
Health | −0.009 | 0.029 | −0.018 | 0.026 | ||
Male | −0.104 | 0.159 | −0.112 | 0.142 | ||
Occupation (Clerk) | ||||||
Manager | 0.207 | 0.211 | 0.209 | 0.179 | ||
Technician | 0.125 | 0.284 | 0.120 | 0.241 | ||
Agriculture | 0.0111 | 0.436 | 0.037 | 0.471 | ||
Manufacturing job (H) | −0.133 | 0.260 | −0.127 | 0.227 | ||
Manufacturing job (L) | −0.260 | 0.275 | −0.218 | 0.249 | ||
Service | −0.036 | 0.261 | −0.062 | 0.230 | ||
Others | −0.007 | 0.247 | 0.084 | 0.248 | ||
Regular worker | 0.021 | 0.142 | ||||
Private sector | −0.013 | 0.272 | ||||
Urban | −0.125 | 0.155 | ||||
Region (East) | ||||||
Central | −0.171 | 0.160 | ||||
West | 0.048 | 0.224 | ||||
Constants | 2.128*** | 0.342 | 2.324*** | 0.453 | 2.746*** | 0.455 |
Inverse Mills ratio | −5.347*** | 1.526 | −5.090*** | 1.385 | −4.213*** | 1.088 |
Observations | 4,064 | 4,064 | 4,064 | |||
Prob > chi2 | 0.151 | 0.547 | 0.778 |
10th | 30th | 60th | 90th | |
---|---|---|---|---|
Treatment | 0.255 | 0.254 | 0.102 | −0.100 |
(0.548) | (0.207) | (0.180) | (0.341) | |
Year | 0.948*** | 0.720** | 0.630*** | 0.445*** |
(0.241) | (0.091) | (0.079) | (0.150) | |
DID | −0.097 | −0.028 | −0.0226 | −0.084 |
(0.581) | (0.220) | (0.191) | (0.362) | |
Inverse Mills ratio | −3.009* | −2.779*** | −3.005*** | −2.617*** |
(1.658) | (0.627) | (0.545) | (1.032) | |
Constants | 0.627 | 1.209*** | 1.859*** | 2.825*** |
(0.425) | (0.161) | (0.140) | (0.265) | |
Observations | 980 | 980 | 980 | 980 |
Pseudo R2 | 0.112 | 0.146 | 0.1407 | 0.14 |
Panel A: DID method | ||||||
---|---|---|---|---|---|---|
Model 1 | Model 2 | Model 3 | ||||
coef. | S.E. | coef. | S.E. | coef. | S.E. | |
Treatment | 0.145 | 0.436 | 0.376 | 0.417 | 0.076 | 0.180 |
Year | 0.690*** | 0.233 | 0.766*** | 0.205 | 0.607*** | 0.085 |
DIDy2004 | −0.585 | 0.620 | −0.777 | 0.574 | −0.550** | 0.244 |
DIDy2006 | −0.388 | 0.586 | −0.576 | 0.559 | −0.279 | 0.235 |
DIDy2009 | −0.287 | 0.598 | −0.318 | 0.576 | 0.008 | 0.240 |
DIDy2011 | −0.085 | 0.523 | −0.180 | 0.493 | 0.151 | 0.209 |
Constants | 2.180*** | 0.329 | 1.985*** | 0.357 | 1.700*** | 0.171 |
Inverse Mills ratio | −2.714** | 1.139 | −2.341** | 0.937 | −0.760* | 0.456 |
Observations | 980 | 980 | 980 | |||
Prob > chi2 | 0.082 | 0.000 | 0.000 |
Panel B: DDD method | ||||||
---|---|---|---|---|---|---|
Model 1 | Model 2 | Model 3 | ||||
coef. | S.E. | coef. | S.E. | coef. | S.E. | |
Treatment | 0.035 | 0.251 | 0.0992 | 0.259 | −0.057 | 0.221 |
College | 0.467 | 0.212 | 0.308 | 0.205 | 0.184 | 0.166 |
y2004 | 0.209 | 0.158 | 0.243 | 0.154 | −0.001 | 0.129 |
y2006 | 0.094 | 0.160 | 0.133 | 0.156 | −0.012 | 0.138 |
y2009 | 0.380*** | 0.175 | 0.447*** | 0.173 | 0.252 | 0.159 |
y2011 | 0.656*** | 0.187 | 0.720*** | 0.186 | 0.436** | 0.188 |
Year * College | 0.025 | 0.234 | 0.015 | 0.223 | 0.114 | 0.178 |
College * Aged 21–25 | −0.033 | 0.540 | 0.134 | 0.548 | 0.067 | 0.463 |
Year * Aged 21–25 | 0.099 | 0.302 | 0.107 | 0.315 | 0.233 | 0.260 |
DDDy2004 | −0.149 | 0.813 | −0.334 | 0.816 | −0.257 | 0.663 |
DDDy2006 | 0.088 | 0.784 | −0.150 | 0.810 | −0.083 | 0.647 |
DDDy2009 | −0.117 | 0.799 | −0.173 | 0.831 | −0.133 | 0.659 |
DDDy2011 | −0.220 | 0.696 | −0.360 | 0.704 | −0.227 | 0.571 |
Constants | 1.769*** | 0.240 | 1.876*** | 0.307 | 2.131*** | 0.326 |
Inverse Mills ratio | −3.296*** | 1.137 | −3.060*** | 1.029 | −2.302*** | 0.872 |
Observations | 4,046 | 4,046 | 4,046 | |||
Prob > chi2 | 0.000 | 0.000 | 0.000 |
7.5.2 The Results of the Impact of the Higher Education Expansion Policy on Wage by Gender
Panel A: DID method | ||||
---|---|---|---|---|
Female | Male | |||
coef. | S.E. | coef. | S.E. | |
Treatment | 0.290 | 0.323 | 0.035 | 0.252 |
Year | 0.622*** | 0.138 | 0.641*** | 0.127 |
DID | −0.255 | 0.344 | −0.060 | 0.264 |
Constants | 1.655*** | 0.249 | 1.829*** | 0.236 |
Inverse Mills ratio | −1.011** | 0.470 | 0.247 | 0.612 |
Observations | 408 | 572 | ||
Prob > chi2 | 0.000 | 0.000 |
Panel B: DDD method | ||||
---|---|---|---|---|
Female | Male | |||
coef. | S.E. | coef. | S.E. | |
Treatment | −0.144 | 0.671 | 0.069 | 0.428 |
Year | −0.096 | 0.376 | 0.085 | 0.213 |
College | 0.289 | 0.523 | 0.162 | 0.313 |
Year * College | 0.086 | 0.553 | 0.222 | 0.340 |
Year * Aged 21–25 | 0.077 | 1.570 | −0.045 | 0.842 |
College * Aged 21–25 | 0.298 | 0.784 | 0.206 | 0.507 |
DDD | −0.270 | 1.748 | −0.189 | 0.973 |
Constants | 2.943 | 2.301 | 2.235* | 1.200 |
Inverse Mills ratio | −1.446 | 1.615 | −0.394 | 1.520 |
Observations | 1,722 | 2,342 | ||
Prob > chi2 | 0.999 | 0.690 |
7.5.3 The Results of the Impact of the Higher Education Expansion Policy on Wage by Region and Hukou Groups
Panel A: DID method | ||||
---|---|---|---|---|
East | Central/West | |||
coef. | S.E. | coef. | S.E. | |
Treatment | 0.165 | 0.916 | −0.050 | 0.253 |
Year | 0.397 | 0.466 | 0.502*** | 0.116 |
DID | −0.060 | 0.933 | 0.221 | 0.295 |
Constants | 2.401*** | 0.861 | 1.361*** | 0.260 |
Inverse Mills ratio | −2.740 | 2.035 | −0.172 | 0.390 |
Observations | 533 | 447 | ||
Prob > chi2 | 0.000 | 0.000 |
Panel B: DDD method | ||||
---|---|---|---|---|
East | Central/West | |||
coef. | S.E. | coef. | S.E. | |
Treatment | 0.197 | 0.577 | −0.097 | 0.187 |
Year | 0.045 | 0.321 | 0.213** | 0.090 |
College | 0.321 | 0.439 | 0.169 | 0.137 |
Year * College | 0.049 | 0.460 | 0.175 | 0.151 |
Year * Aged 21–25 | −0.022 | 1.113 | 0.067 | 0.397 |
College * Aged 21–25 | −0.039 | 0.662 | 0.415 | 0.222 |
DDD | −0.111 | 1.235 | −0.313 | 0.466 |
Constants | 2.880*** | 0.579 | 1.637*** | 0.202 |
Inverse Mills ratio | −3.359*** | 1.077 | −1.572*** | 0.450 |
Observations | 1,712 | 2,352 | ||
Prob > chi2 | 0.796 | 0.000 |
Panel A: DID method | ||||
---|---|---|---|---|
Urban | Rural | |||
coef. | S.E. | coef. | S.E. | |
Treatment | 0.213 | 0.210 | −0.538 | 0.344 |
Year | 0.633*** | 0.108 | 0.406*** | 0.135 |
DID | −0.301 | 0.221 | 0.819** | 0.374 |
Constants | 1.975*** | 0.180 | 1.514*** | 0.291 |
Inverse Mills ratio | −0.792* | 0.515 | −0.009 | 0.421 |
Observations | 645 | 335 | ||
Prob > chi2 | 0.000 | 0.000 |
Panel B: DDD method | ||||
---|---|---|---|---|
Urban | Rural | |||
coef. | S.E. | coef. | S.E. | |
Treatment | 0.126 | 0.130 | −0.0133 | 0.401 |
Year | 0.187** | 0.080 | 0.144 | 0.182 |
University | 0.490*** | 0.106 | 0.267 | 0.323 |
Year * University | −0.018 | 0.163 | −0.007 | 0.346 |
Year * Aged 21–25 | 0.309 | 0.346 | −0.555 | 1.010 |
University * Aged 21–25 | −0.700*** | 0.182 | 0.242 | 0.449 |
DDD | −0.008* | 0.238 | 0.451 | 1.123 |
Constants | 1.975*** | 0.180 | 2.819*** | 0.883 |
Inverse Mills ratio | −0.792* | 0.515 | −2.850*** | 0.788 |
Observations | 2,342 | 1,857 | ||
Prob > chi2 | 0.690 | 0.432 |
7.5.4 Robustness Checks
Estimation 1 | ||||||
---|---|---|---|---|---|---|
Model 1 | Model 2 | Model 3 | ||||
coef. | S.E. | coef. | S.E. | coef. | S.E. | |
Treatment | 0.010 | 0.397 | 0.182 | 0.389 | −0.016 | 0.156 |
Year | 0.675*** | 0.251 | 0.751*** | 0.233 | 0.594*** | 0.096 |
DID | −0.225 | 0.415 | −0.309 | 0.404 | −0.073 | 0.163 |
Exp. | −0.093 | 0.077 | −0.092 | 0.071 | −0.035 | 0.029 |
Exp-sq. | 0.007 | 0.007 | 0.007 | 0.007 | 0.004 | 0.003 |
Health | −0.007 | 0.028 | −0.009 | 0.012 | ||
Male | 0.078 | 0.162 | 0.110* | 0.064 | ||
Occupation (Clerk) | ||||||
Manager | 0.235 | 0.186 | 0.3054*** | 0.073 | ||
Technician | 0.016 | 0.251 | 0.042 | 0.097 | ||
Agri. | −0.095 | 1.077 | −0.036 | 0.670 | ||
Manufacturing job (H) | −0.239 | 0.379 | −0.170 | 0.147 | ||
Manufacturing job (L) | −0.256 | 0.541 | 0.041 | 0.228 | ||
Service | −0.008 | 0.363 | 0.013 | 0.142 | ||
Others | 0.061 | 0.277 | 0.065 | 0.118 | ||
Regular worker | 0.002 | 0.073 | ||||
Private sector | −0.046 | 0.129 | ||||
Urban | 0.252*** | 0.071 | ||||
Region (East) | ||||||
Central | −0.325*** | 0.099 | ||||
West | −0.231** | 0.111 | ||||
Constants | 2.167*** | 0.346 | 1.984*** | 0.390 | 1.797*** | 0.187 |
Inverse Mills ratio | −2.912** | 1.307 | −2.662** | 1.137 | −1.015* | 0.580 |
Observations | 1,116 | 1,116 | 1,116 | |||
Prob > chi2 | 0.057 | 0.066 | 0.000 |
Estimation 2 | ||||||
---|---|---|---|---|---|---|
Model 1 | Model 2 | Model 3 | ||||
coef. | S.E. | coef. | S.E. | coef. | S.E. | |
Treatment | 0.010 | 0.397 | 0.223 | 0.463 | 0.046 | 0.286 |
Year | 0.675*** | 0.251 | 0.710** | 0.329 | 0.554 | 0.207 |
DID | −0.225 | 0.415 | −0.213 | 0.480 | −0.027 | 0.297 |
Exp. | −0.093 | 0.077 | −0.055 | 0.095 | −0.024 | 0.058 |
Exp-sq. | 0.007 | 0.007 | 0.004 | 0.009 | 0.003 | 0.006 |
Health | −0.008 | 0.035 | −0.009 | 0.022 | ||
Male | 0.039 | 0.205 | 0.055 | 0.125 | ||
Occupation (Clerk) | ||||||
Manager | 0.251 | 0.235 | 0.295** | 0.141 | ||
Technician | 0.056 | 0.320 | 0.070 | 0.189 | ||
Agri. | 0.239 | 1.262 | 0.066 | 1.120 | ||
Manufacturing job (H) | −0.182 | 0.462 | −0.142 | 0.276 | ||
Manufacturing job (L) | −0.317 | 0.664 | −0.072 | 0.435 | ||
Service | −0.073 | 0.461 | −0.074 | 0.274 | ||
Others | 0.090 | 0.360 | 0.080 | 0.233 | ||
Regular worker | 0.015 | 0.138 | ||||
Private sector | −0.029 | 0.265 | ||||
Urban | 0.162 | 0.135 | ||||
Region (East) | ||||||
Central | −0.246 | 0.207 | ||||
West | −0.161 | 0.228 | ||||
Constants | 2.167*** | 0.346 | 2.040*** | 0.509 | 1.975*** | 0.362 |
Inverse Mills ratio | −2.912** | 1.307 | −3.766*** | 1.741 | −2.201 | 1.413 |
Observations | 1,454 | 1,454 | 1,454 | |||
Prob > chi2 | 0.531 | 0.872 | 0.872 |
Model 1 | Model 2 | Model 3 | ||||
---|---|---|---|---|---|---|
coef. | S.E. | coef. | S.E. | coef. | S.E. | |
Treatment | −0.539 | 0.416 | −0.318 | 0.413 | −0.342 | 0.394 |
Year | 0.174 | 0.171 | 0.250 | 0.166 | 0.048 | 0.175 |
DID | 0.237 | 0.306 | 0.206 | 0.313 | 0.223 | 0.304 |
Exp. | −0.073 | 0.087 | −0.061 | 0.086 | −0.039 | 0.081 |
Exp-sq. | 0.001 | 0.006 | 0.000 | 0.005 | 0.000 | 0.005 |
Health | −0.008 | 0.027 | −0.023 | 0.027 | ||
Male | −0.115 | 0.143 | −0.146 | 0.140 | ||
Occupation (Clerk) | ||||||
Manager | 0.096 | 0.206 | 0.106 | 0.190 | ||
Technician | 0.240 | 0.269 | 0.177 | 0.247 | ||
Agriculture | −0.013 | 0.313 | 0.106 | 0.368 | ||
Manufacturing job (H) | −0.129 | 0.213 | −0.125 | 0.201 | ||
Manufacturing job (L) | −0.232 | 0.218 | −0.238 | 0.209 | ||
Service | 0.004 | 0.213 | −0.048 | 0.206 | ||
Others | −0.042 | 0.212 | 0.057 | 0.232 | ||
Regular worker | −0.008 | 0.131 | ||||
Private sector | −0.055 | 0.234 | ||||
Urban | −0.075 | 0.151 | ||||
Region (East) | ||||||
Central | −0.218 | 0.149 | ||||
West | 0.070 | 0.203 | ||||
Constants | 2.653*** | 0.471 | 2.720*** | 0.565 | 3.125*** | 0.596 |
Inverse Mills ratio | −3.375*** | 0.990 | −3.113*** | 0.926 | −2.757*** | 0.775 |
Observations | 1,892 | 1,892 | 1,892 | |||
Prob > chi2 | 0.0276 | 0.094 | 0.807 |