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Table 2.
Effects of a Double Major on Earnings (Ordinary Least Squares)
Compared with Higher Paying MajorsCompared with Lower Paying Majors
(1)(2)(3)(4)(5)(6)(7)(8)
Dependent: 2009 earnings (1 year post-BA) 
Double major −0.050 −0.063 −0.071* −0.071** 0.108** 0.100** 0.095** 0.025 
 (0.040) (0.039) (0.039) (0.029) (0.045) (0.044) (0.043) (0.030) 
Second degree 0.117* 0.124* 0.125* 0.072 0.151* 0.160* 0.156* 0.080 
 (0.070) (0.069) (0.072) (0.053) (0.072) (0.070) (0.072) (0.054) 
N 8,580 8,580 8,580 8,540 8,580 8,580 8,580 8,540 
Dependent: 2012 earnings (4 years post-BA) 
Double major 0.060 0.045 0.044 0.013 0.183*** 0.168*** 0.169** 0.114*** 
 (0.045) (0.043) (0.042) (0.036) (0.047) (0.044) (0.044) (0.035) 
Second degree 0.054 0.079 0.092 0.024 0.093 0.118 0.128 0.042 
 (0.091) (0.090) (0.095) (0.062) (0.090) (0.089) (0.094) (0.062) 
N 7,800 7,800 7,800 7,800 7,800 7,800 7,800 7,800 
Important controls 
Demographic & family background 
Institutional control & selectivity   
Academic performance     
Postgraduate experience       
Compared with Higher Paying MajorsCompared with Lower Paying Majors
(1)(2)(3)(4)(5)(6)(7)(8)
Dependent: 2009 earnings (1 year post-BA) 
Double major −0.050 −0.063 −0.071* −0.071** 0.108** 0.100** 0.095** 0.025 
 (0.040) (0.039) (0.039) (0.029) (0.045) (0.044) (0.043) (0.030) 
Second degree 0.117* 0.124* 0.125* 0.072 0.151* 0.160* 0.156* 0.080 
 (0.070) (0.069) (0.072) (0.053) (0.072) (0.070) (0.072) (0.054) 
N 8,580 8,580 8,580 8,540 8,580 8,580 8,580 8,540 
Dependent: 2012 earnings (4 years post-BA) 
Double major 0.060 0.045 0.044 0.013 0.183*** 0.168*** 0.169** 0.114*** 
 (0.045) (0.043) (0.042) (0.036) (0.047) (0.044) (0.044) (0.035) 
Second degree 0.054 0.079 0.092 0.024 0.093 0.118 0.128 0.042 
 (0.091) (0.090) (0.095) (0.062) (0.090) (0.089) (0.094) (0.062) 
N 7,800 7,800 7,800 7,800 7,800 7,800 7,800 7,800 
Important controls 
Demographic & family background 
Institutional control & selectivity   
Academic performance     
Postgraduate experience       

Notes: Standard errors clustered at institutional level are in parentheses. Panel and transcript weights are applied, and variances are estimated by Taylor linearized method. Estimations are based on the respondents who were employed and not enrolled in 2009 and 2012, respectively. Variables for demographics, institutional control and selectivity, and academic performance are listed in Appendix table A.2. Postgraduation experience includes work experience and its squared term, working hours per week, relatedness of colleges majors with occupations, and whether the student has a post-bachelor's (BA) degree.

*p < 0.1; **p < 0.05; ***p < 0.01.

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