Simulated Data from Shipley (2009)
shipleyA data frame with 1900 observations and 9 variables:
a numeric code giving the site from which the observation comes
a numeric code giving the tree from which the observation comes
the latitude of the site
the year in which the observation was taken
the Julian date when the bud burst occurs
the number of degree days when bud burst occurs
the increase in diameter growth of the tree
the probability of survival until the next year (used only for the simulation)
a binary value (1 = tree lived the following winter, 0 = tree died the following winter)
Shipley, B. (2009). Confirmatory path analysis in a generalized multilevel context. Ecology, 90(2), 363-368. doi:10/bqd43d