Interpretation of lme output with correlation structure specification

Hi Andrew,

Thanks for your response.

I had just one more question. I was using a nested random effect and the output looks like follows:

Random effects:
Formula: ~1 | year
        (Intercept)
StdDev: 0.001158148

Formula: ~1 | month %in% year
        (Intercept) Residual
StdDev:    7.551615  3.77298