Grunfeld: Grunfeld's Investment Data
In plm: Linear Models for Panel Data

Description Format Details Note Source References See Also Examples

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

A data frame containing :

firm: observation
year: date
inv: gross Investment
value: value of the firm
capital: stock of plant and equipment

total number of observations : 200

observation : production units

country : United States

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.

Online complements to Baltagi (2001):

https://www.wiley.com/legacy/wileychi/baltagi/

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

Online complements to Baltagi (2013):

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

\insertRef

BALT:01plm

\insertRef

BALT:13plm

\insertRef

GRUN:58plm

\insertRef

KLEI:ZEIL:10plm

website accompanying the paper with various variants of the Grunfeld data: https://www.zeileis.org/grunfeld/.

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

## 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)