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Hi there is a very minor typo in the 4th line of the 3rd code chunk in section 3.6
gam should be glm (in order to get a pval of 0.647)
Great book and package by the way!
Claire

shipley_psem3 <- psem(
gam(x2 ~ s(x1), data = dat2, family = gaussian),
glm(x3 ~ x2, data = dat2, family = poisson),
gam(x4 ~ x2, data = dat2, family = poisson), #should be glm
glm(x5 ~ x3 + x4, data = dat2, family = binomial)
)

Are there plans in the works to get a DOI for the book or the repository? Do you know of any papers citing the work?

I find myself using this book quite a bit and want to be sure you're properly credited!

The Spartina genotype SEM example has below.C as the response and belowCN as the predictor

Hi! In Chapter 3.4 you go over the Log-Likelihood chi-squared test and make reference to a function LLchisq() , which I presume should be in your piecewiseSEM package, but I don't see it in there (or in any other R package) and am not able to run it. Very nice book by the way, thanks for this resource!