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 comparision of various Grunfeld data sets in use.