# Chapter 9 Dynamic linear models

Dynamic linear models (DLMs) are a type of linear regression model, wherein the parameters are treated as time-varying rather than static. DLMs are used commonly in econometrics, but have received less attention in the ecological literature . Our treatment of DLMs is rather cursory—we direct the reader to excellent textbooks by and for more in-depth treatments of DLMs. The former focuses on Bayesian estimation whereas the latter addresses both likelihood-based and Bayesian estimation methods.

A script with all the R code in the chapter can be downloaded here. The Rmd for this chapter can be downloaded here.

### Data

Most of the data used in the chapter are from the MARSS package. Install the package, if needed, and load:

library(MARSS)

The problem set uses an additional data set on spawners and recruits (KvichakSockeye) in the atsalibrary package.