card {sampcompR}R Documentation

card

Description

This data, which originates from D. Card (1995) was released in the Wooldridge R-Package. Sadly the wooldridge package (Shea 2023) was archived on CRAN on the 3rd of December 2024. As we use it, e.g., in our examples to show how our package works, we also added it to our package, so we can further use it. Further we cite the original description of the wooldrigde package. Wooldridge Source: D. Card (1995), Using Geographic Variation in College Proximity to Estimate the Return to Schooling, in Aspects of Labour Market Behavior: Essays in Honour of John Vanderkamp. Ed. L.N. Christophides, E.K. Grant, and R. Swidinsky, 201-222. Toronto: University of Toronto Press. Professor Card kindly provided these data. Data loads lazily.

Usage

data('card')

Format

A data.frame with 3010 observations on 34 variables:

Notes

Computer Exercise C15.3 is important for analyzing these data. There, it is shown that the instrumental variable, nearc4, is actually correlated with IQ, at least for the subset of men for which an IQ score is reported. However, the correlation between ⁠nearc4`` and ⁠IQ⁠, once the other explanatory variables are netted out, is arguably zero. At least, it is not statistically different from zero. In other words, ⁠nearc4‘ fails the exogeneity requirement in a simple regression model but it passes, at least using the crude test described above, if controls are added to the wage equation. For a more advanced course, a nice extension of Card’s analysis is to allow the return to education to differ by race. A relatively simple extension is to include black education (blackeduc) as an additional explanatory variable; its natural instrument is blacknearc4.

Used in Text: pages 526-527, 547

Source

https://www.cengage.com/cgi-wadsworth/course_products_wp.pl?fid=M20b&product_isbn_issn=9781111531041

References

Shea J (2023). wooldridge: 115 Data Sets from "Introductory Econometrics: A Modern Approach, 7e" by Jeffrey M. Wooldridge. R package version 1.4-3, https://CRAN.R-project.org/package=wooldridge.

Examples

 data("card")
str(card)

[Package sampcompR version 0.3.0 Index]