Functions for use with the practicals in Davison and Hinkley (1997).
nested.corr(data, w, t0, M) lik.CI(like, lim)
nested.corr is meant for use with the double bootstrap
in practical 5.5 of Davison and Hinkley (1997).
lik.CI is meant for use with practicals 10.1 and 10.2 of
Davison and Hinkley (1997).
Davison, A. C. and Hinkley, D. V. (1997) Bootstrap Methods and Their Application. Cambridge University Press.