Revisiting The Bell Curve Debate Regarding the Effects of Cognitive Ability on Wages



Table 3: Independent variable is Log of Hourly Wage Rate (Hausman-Taylor Analysis)

3A

3B

3C

3D

3E

Regression Model

HT

HT

HT

HT

HT

Time Period

1979-1994

1994-2002

1979-1994

1994-2002

1979-1994

Number of Observations

96300

32067

96300

32067

81544

Time-Invariant Endogenous

General Intelligence

0.277**

0.275**

0.243**

0.243

0.265*

(0.094)

(0.133)

(0.088)

(0.134)

(0.109)

Black*test

-0.247

0.153

-0.181

0.197

-0.163

(0.291)

(0.236)

(0.271)

(0.236)

(0.233)

Hispanic*test

-0.137

-0.125

-0.057

-0.101

-0.108

(0.081)

(0.101)

(0.076)

(0.105)

(0.105)

Male*test

-0.073

0.065

-0.068

0.093

-0.051

(0.059)

(0.108)

(0.055)

(0.108)

(0.068)

Time-Invariant Exogenous

Black

0.077

0.921**

0.499

1.398**

0.636**

(0.337)

(0.200)

(0.332)

(0.336)

(0.241)

Hispanic

0.343**

0.429**

0.921**

0.588*

0.952**

(0.106)

(0.125)

(0.140)

(0.279)

(0.141)

Male

0.153**

0.106**

0.096

0.470*

0.074

(0.036)

(0.044)

(0.085)

(0.218)

(0.094)

Time-Variant Endogenous

Education

0.091**

0.053**

0.105**

0.077**

0.106**

(0.003)

(0.007)

(0.005)

(0.013)

(0.005)

Black*edu

-0.031**

-0.034

-0.032**

(0.008)

(0.019)

(0.008)

Hispanic*edu

-0.046**

-0.013

-0.047**

(0.008)

(0.020)

(0.008)

Male*edu

0.005

-0.027

0.005

(0.006)

(0.016)

(0.007)

Time-Variant Exogenous

Job Tenure

0.050**

0.023**

0.050**

0.023**

0.050**

(0.001)

(0.002)

(0.001)

(0.002)

(0.002)

Job Tenure2

-0.002**

-0.001**

-0.002**

-0.001**

-0.002**

(1.21E-04)

(9.96E-05)

(-1.21E-04)

(-9.99E-05)

(-1.27E-04)

Labor Market Exp

0.095**

0.073**

0.095**

0.073**

0.093**

(0.001)

(0.004)

(0.001)

(0.004)

(0.001)

Labor Market Exp2

-0.002**

-0.001**

-0.002**

-0.001**

-0.002**

(6.81E-05)

(1.24E-04)

(-6.82E-05)

(-1.24E-04)

(-7.27E-05)

Married

0.028**

0.005

0.027**

0.005

0.030**

(0.004)

(0.010)

(0.004)

(0.010)

(0.005)

Children

-0.014**

-0.001

-0.014**

-0.001

-0.013**

(0.002)

(0.005)

(0.002)

(0.005)

(0.003)

Urban

0.060**

0.005

0.060**

0.005

0.066**

(0.007)

(0.008)

(0.007)

(0.008)

(0.008)

Local Unemployment

-0.005**

-0.003**

-0.005**

-0.003**

-0.005**

(0.001)

(0.001)

(0.001)

(0.001)

(0.001)

Constant

-0.203**

0.406**

-0.351**

0.094

-0.389**

(0.066)

(0.114)

(0.079)

(0.181)

(0.093)

standard errors in parentheses; *significant at 5 percent level ** significant at 1 percent level

28



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