Lagged effects between variables

[Ruby Ji]

Dear INLA experts,

I have developed a model that considers the effect of "y" on "e". The model formula is as follows:

form <- y ~ -1 + y.b0 + e.b0 +
 
  f(year.y, model="rw1", scale.model=TRUE, constr=TRUE) +
  f(sy, model=spde) +
 
  f(year.e, model="rw1", scale.model=TRUE, constr=TRUE) +
  f(se, model=spde) +
  f(year.ey, copy="year.y", fixed=FALSE) +
  f(sey, copy="sy", same.as="year.ey", fixed=FALSE) 

Now, I want to explore the lagged effect of "y" on "e". That means, I am interested in determining whether "y" from the previous year could impact "e" in the current year. Is it possible to model this effect?

Thanks,

Ruby
 

[Håvard Rue]

you can have

y ~ y

you just need to index the rhs differently, like

y ~ yy

data=data.frame(y,yy=c(0,y[-length(y)]))

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Håvard Rue
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