PSID2: Panel Study of Income Dynamics

In ssmodels: Sample Selection Models

Panel Study of Income Dynamics

Description

The data come from the Panel Study of Income Dynamics, years 1981 to 1992 (also contains earnings data from 1980). The sample consists of 579 white females, who were followed over the considered period. In total, there are 6,948 observations over the 12-year period (1981-1992). This data frame contains the following columns:

• id: Individual identifier

• year: Survey year

• age: Calculated age in years (based on year and month of birth)

• educ: Years of schooling

• children: Total number of children in family unit, ages 0-17

• s: Participation dummy, =1 if worked (hours>0)

• lnw: Log of real average hourly earnings

• lnw80: Log earnings in 1980

• agesq: Age squared

• children_lag1: Number of children in t-1

• children_lag2: Number of children in t-2

• lnw2: Log of real average hourly earnings

• Lnw: Log of real average hourly earnings

Usage

PSID2

Format

An object of class data.frame with 6948 rows and 13 columns.

Source

http://simba.isr.umich.edu/

References

\insertRef

semykina2013estimationssmodels

\insertRef

ssmrobssmodels

\insertRef

sampleSelectionssmodels

Examples

data(PSID2)
attach(PSID2)
hist(Lnw)
selectEq <- s ~ educ+ age+ children+ year
outcomeEq <- Lnw ~ educ+ age+ children
HCinitial(selectEq,outcomeEq, data = PSID2)
#Note that the estimated value of rho by the two-step
#method is greater than 1
summary(HeckmanGe(selectEq,outcomeEq, 1, 1, data = PSID2))

ssmodels documentation built on Oct. 4, 2022, 5:06 p.m.