Zhenjuan Liu and Thanasis Stengos, "Non-linearities in Cross Country
Growth Regressions: A Semiparametric Approach", Journal of Applied
Econometrics, Vol. 14, No. 5, 1999, pp. 527-538.

There are 2 data files, which came from the King and Levine data base (QJE,
CVIII, 717-737). They contain the following variables:

1: decbas1.dat (258 x 6)
        Col. 1: country index
        Col. 2: dummy 1960 = 1, 0 otherwise
        Col. 3: dummy 1970 = 1, 0 otherwise
        Col. 4: dummy 1980 = 1, 0 otherwise
        Col. 5: population growth
        Col. 6: gdpgrowth

2: decbas2.dat (258 x 4)
        Col. 1: investment/gdp
        Col. 2: real gdp in 1960
        Col. 3: schooling enrollment rate
        Col. 4: country index

These files are in DOS format and are zipped in the file ls-data.zip.