Wooldridge Source: Economic Report of the President, 2007, Tables B-4 and B-42. Data loads lazily.
data('okun')A data.frame with 47 observations on 4 variables:
year: 1959 through 2005
pcrgdp: percentage change in real GDP
unem: civilian unemployment rate
cunem: unem - unem[_n-1]
https://www.cengage.com/cgi-wadsworth/course_products_wp.pl?fid=M20b&product_isbn_issn=9781111531041
410, 444
str(okun)
#> 'data.frame': 47 obs. of 4 variables:
#> $ year : int 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 ...
#> $ pcrgdp: num 7.1 2.5 2.3 6.1 4.4 ...
#> $ unem : num 5.5 5.5 6.7 5.5 5.7 ...
#> $ cunem : num NA 0 1.2 -1.2 0.2 ...
#> - attr(*, "time.stamp")= chr "25 Jun 2011 23:03"