Grunfeld {plm} | R Documentation

## Grunfeld's Investment Data

### Description

A balanced panel of 10 observational units (firms) from 1935 to 1954

total number of observations : 200

observation : production units

country : United States

### Usage

    data(Grunfeld)

### Format

A data frame containing :

firm

  observation

year

  date

inv

  gross Investment

value

  value of the firm

capital

  stock of plant and equipment

### Note

The Grunfeld data as provided in package `plm` is the same data as used in Baltagi (2001), see Examples below.

NB:
Various versions of the Grunfeld data circulate online. Also, various text books (and also varying among editions) and papers use different subsets of the original Grunfeld data, some of which contain errors in a few data points compared to the original data used by Grunfeld (1958) in his PhD thesis. See Kleiber/Zeileis (2010) and its accompanying website for a comparison of various Grunfeld data sets in use.

### Source

Online complements to Baltagi (2001):

http://www.wiley.com/legacy/wileychi/baltagi/ http://www.wiley.com/legacy/wileychi/baltagi/supp/Grunfeld.fil

Online complements to Baltagi (2013):

http://bcs.wiley.com/he-bcs/Books?action=resource&bcsId=4338&itemId=1118672321&resourceId=13452

### References

Baltagi, Badi H. (2001) Econometric Analysis of Panel Data, 2nd ed., John Wiley and Sons;
accompanying website http://www.wiley.com/legacy/wileychi/baltagi/.

Baltagi, Badi H. (2013) Econometric Analysis of Panel Data, 5th ed., John Wiley and Sons;
accompanying website http://bcs.wiley.com/he-bcs/Books?action=resource&bcsId=4338&itemId=1118672321&resourceId=13452.

Grunfeld, Yehuda (1958) The Determinants of Corporate Investment, Ph.D. thesis, Department of Economics, University of Chicago.

Kleiber, C./Zeileis, A. (2010) “The Grunfeld Data at 50”, German Economic Review, 11(4), pp. 404–417, http://dx.doi.org/10.1111/j.1468-0475.2010.00513.x;
website accompanying the paper with various variants of the Grunfeld data: http://statmath.wu-wien.ac.at/~zeileis/grunfeld/.

### See Also

For the complete Grunfeld data (11 firms), see `Grunfeld`, in the `AER` package.

### Examples

    ## Not run:
    # Compare plm's Grunfeld data to Baltagi's (2001) Grunfeld data:
      data("Grunfeld"", package="plm")
      Grunfeld_baltagi2001 <- read.csv("http://www.wiley.com/legacy/wileychi/
        baltagi/supp/Grunfeld.fil", sep="", header = FALSE)
      library(compare)
      compare::compare(Grunfeld, Grunfeld_baltagi2001, allowAll = T) # same data set

    ## End(Not run)

[Package plm version 1.6-6 Index]