MROZ.RAW: Wage Offer Data
In ssmrob: Robust Estimation and Inference in Sample Selection Models

Description Usage Format References Examples

Sample of 753 observations, with 325 truncated observations.

1	data(MROZ.RAW)

A data frame with 753 observations on the following 22 variables.

inlf: Logical, TRUE if in labor force.
hours: Hours worked by wife in 1975.
kidslt6: Number of young children, 5 year or younger.
kidsge6: Number of children greater than 6 years of age.
age: Wife's age.
educ: Education level in years.
wage: Average hourly earnings in 1975.
repwage: Wife's wage reported at the time of the 1976 interview.
hushrs: Husband's hours worked in 1975.
husage: Husband's age.
huseduc: Husband's education in years.
huswage: Husband's wage in 1975.
faminc: Family income in 1975.
mtr: Marginal tax rate facing the wife.
motheduc: Wife's mother's education in years.
fatheduc: Wife's father's education in years.
unem: Unemployment rate in county of residence.
city: Logical, TRUE if live in large city.
exper: Wife's labor market experience in years.
nwifeinc: Non-wife income, households's total money minus wife's labor income.
lwage: Wife's log-wage.
expersq: Wife's squared experience.

Mroz , T.A. (1987) The Sensitivity of an Empirical Model of Married Women's Hours of Work to Economic and Statistical Assumptions. Econometrica, 55, p. 765-799.

Wooldridge, J.M. (2002) Econometric Analysis of Cross Section and Panel Data, Cambridge MA: MIT Press.

1 2	data(MROZ.RAW) summary(MROZ.RAW)

Loading required package: sampleSelection
Loading required package: maxLik
Loading required package: miscTools

Please cite the 'maxLik' package as:
Henningsen, Arne and Toomet, Ott (2011). maxLik: A package for maximum likelihood estimation in R. Computational Statistics 26(3), 443-458. DOI 10.1007/s00180-010-0217-1.

If you have questions, suggestions, or comments regarding the 'maxLik' package, please use a forum or 'tracker' at maxLik's R-Forge site:
https://r-forge.r-project.org/projects/maxlik/
Loading required package: robustbase

Attaching package: 'robustbase'

The following objects are masked from 'package:miscTools':

    colMedians, rowMedians

Loading required package: mvtnorm
Loading required package: MASS
      inlf            hours           kidslt6          kidsge6     
 Min.   :0.0000   Min.   :   0.0   Min.   :0.0000   Min.   :0.000  
 1st Qu.:0.0000   1st Qu.:   0.0   1st Qu.:0.0000   1st Qu.:0.000  
 Median :1.0000   Median : 288.0   Median :0.0000   Median :1.000  
 Mean   :0.5684   Mean   : 740.6   Mean   :0.2377   Mean   :1.353  
 3rd Qu.:1.0000   3rd Qu.:1516.0   3rd Qu.:0.0000   3rd Qu.:2.000  
 Max.   :1.0000   Max.   :4950.0   Max.   :3.0000   Max.   :8.000  
                                                                   
      age             educ            wage           repwage         hushrs    
 Min.   :30.00   Min.   : 5.00   Min.   : 0.000   Min.   :0.00   Min.   : 175  
 1st Qu.:36.00   1st Qu.:12.00   1st Qu.: 0.000   1st Qu.:0.00   1st Qu.:1928  
 Median :43.00   Median :12.00   Median : 1.625   Median :0.00   Median :2164  
 Mean   :42.54   Mean   :12.29   Mean   : 2.375   Mean   :1.85   Mean   :2267  
 3rd Qu.:49.00   3rd Qu.:13.00   3rd Qu.: 3.788   3rd Qu.:3.58   3rd Qu.:2553  
 Max.   :60.00   Max.   :17.00   Max.   :25.000   Max.   :9.98   Max.   :5010  
                                                                               
     husage         huseduc         huswage            faminc     
 Min.   :30.00   Min.   : 3.00   Min.   : 0.4121   Min.   : 1500  
 1st Qu.:38.00   1st Qu.:11.00   1st Qu.: 4.7883   1st Qu.:15428  
 Median :46.00   Median :12.00   Median : 6.9758   Median :20880  
 Mean   :45.12   Mean   :12.49   Mean   : 7.4822   Mean   :23081  
 3rd Qu.:52.00   3rd Qu.:15.00   3rd Qu.: 9.1667   3rd Qu.:28200  
 Max.   :60.00   Max.   :17.00   Max.   :40.5090   Max.   :96000  
                                                                  
      mtr            motheduc         fatheduc           unem       
 Min.   :0.4415   Min.   : 0.000   Min.   : 0.000   Min.   : 3.000  
 1st Qu.:0.6215   1st Qu.: 7.000   1st Qu.: 7.000   1st Qu.: 7.500  
 Median :0.6915   Median :10.000   Median : 7.000   Median : 7.500  
 Mean   :0.6789   Mean   : 9.251   Mean   : 8.809   Mean   : 8.624  
 3rd Qu.:0.7215   3rd Qu.:12.000   3rd Qu.:12.000   3rd Qu.:11.000  
 Max.   :0.9415   Max.   :17.000   Max.   :17.000   Max.   :14.000  
                                                                    
      city            exper          nwifeinc            lwage        
 Min.   :0.0000   Min.   : 0.00   Min.   :-0.02906   Min.   :-2.0542  
 1st Qu.:0.0000   1st Qu.: 4.00   1st Qu.:13.02504   1st Qu.: 0.8165  
 Median :1.0000   Median : 9.00   Median :17.70000   Median : 1.2476  
 Mean   :0.6428   Mean   :10.63   Mean   :20.12896   Mean   : 1.1902  
 3rd Qu.:1.0000   3rd Qu.:15.00   3rd Qu.:24.46600   3rd Qu.: 1.6036  
 Max.   :1.0000   Max.   :45.00   Max.   :96.00000   Max.   : 3.2189  
                                                     NA's   :325      
    expersq    
 Min.   :   0  
 1st Qu.:  16  
 Median :  81  
 Mean   : 178  
 3rd Qu.: 225  
 Max.   :2025