Course Materials
Required Books
Gujarati, Damodar. 2014. Econometrics by Example. 2nd ed. Bloomsbury Academic.
Kellstedt, Paul M. and Guy D. Whitten. 2013. The Fundamentals of Political Science Research. 2nd ed. New York, NY: Cambridge University Press.
A Comment on Assigned Quantitative Methods Books and Graduate-Level Methods Instruction
The decision on required books are made months in advance of the actual semester. I have the following two-pronged perspective to graduate-level methods instruction. One, the student should read and read widely. Two, no one reading will be sufficient to learn quantitative methods and students will need a bricolage approach to make sense of the material. The assigned books generally serve two purposes. Kellstedt and Whitten (2013) is a gentler text, aimed more at communicating the underlying concepts. Gujarati (2014) will be more about implementation.
I want to add a few recommended books the students may find useful, at least because I found them incredibly useful myself. I highly recommend the Gelman and Hill (2007) book in particular. I owe much to this book (and my own stubborn persistence in teaching myself quantitative methods) even if much of the implementation they offer looks dated relative to recent advances in R
(see also: Gelman et al., 2020). I also strongly recommend reading the Ziliak and McCloskey (2008) book to better appreciate what quantitative methods cannot tell us and how easy it is to misinterpret what these methods are doing for us as researchers. Interested students should first look at these books at the library or on Google Preview and decide if they’d like to learn from these. I have e-versions of almost all these books that I can share as well.
R and RStudio
This course is built around the R
programming language. Students should download this free software programming language at cran.r-project.org and install it on their personal computer. Binaries are available for Windows and Mac (even Linux, if that is the weapon of choice for the student).
-
The
R
scripts I provide are designed to work on the student’s computer with minimal maintenance. I will make this clear in each particular script. -
I strongly encourage students to contact me to learn about the language. I will assume that not discussing
R
with me means the student is fluent with the software. -
Consider getting a graphical user interface (GUI) front-end for
R
to learn it better. I recommend RStudio, available for free atposit.co
. Do note there is a paid option of RStudio that you do not want. The paid version is for servers. You want the basic open source integrated development environment (IDE). This is free. Do not pay for anything related to R or Rstudio since you do not need whatever product is available for purchase.
I published a beginner’s guide to using R
in 2014 when I first started to teach courses that forced students to use the R
programming language. I have since streamlined the R
requirements for this class, making that guide somewhat dated. You will need to install the following packages, which I illustrate here with the R
commands to install them.
install.packages("tidyverse") # for most things workflow
# ^ This is a huge installation. It should take a while.
install.packages("stevedata") # for toy data sets to use in-class
install.packages("stevemisc") # for some helper functions
install.packages("stevethemes") # for optional theme elements
install.packages("stevetemplates") # OPTIONAL, for preparing reports
install.packages("lmtest") # for model diagnostics
install.packages("sandwich") # for assorted var-cov matrix tweaks
install.packages("modelsummary") # for preparing regression tables.
The aforementioned R
packages are not exhaustive of all packages a student may use this semester, and I reserve the right to ask students to install additional packages along the way (though these requests will ideally be rare). I will make this clear in each lab session and problem set.
The {tidyverse}
package will easily be the most time-consuming package to install, and the one most likely to give some students a potential problem during the course of its installation. In the strictest sense of the word “mandatory”, this package is not “mandatory”. It is possible to achieve the same results of this package by using either other packages in R or some functions that are default in R. However, not using this singular package—itself a wrapper for package for dozens of other R packages—would require the student to either download and install other R packages or require the student to learn code that is much less legible and intuitive than {tidyverse}
code. Downloading and installing {tidyverse}
is ultimately worth the effort, especially for beginners.
Based on experience, students may expect the following issues if the installation of this package results in an installation error (“non-zero exit status”), contingent on their operating system.
- Mac: You probably need to update Xcode. Xcode is a developer tool suite for Apple, and many of the
{tidyverse}
packages require access to developmental libraries that, to the best of my understanding, are available in Xcode. In all likelihood, you’re a first-time user who has not had to think about software development (and so you haven’t updated Xcode since you first got your Macbook). You might have to do that here. - Windows: The Windows corollary to Xcode is Rtools, which you don’t have installed by default (because it’s not a Microsoft program, per se). You’ll need to install it. First, take inventory of what version of R you have (for the university’s computer labs, it should be 4.0.5). Go to this website and download the version of Rtools that corresponds with the version of R you have. Just click through all the default options so that it can install.
- Linux: If you self-select into being a Linux user, you are aware of the consequences of your actions and that you may need to install various developmental libraries by yourself. The saving grace is that R packages that fail to install for the absence of developmental libraries they need will explicitly tell you what libraries you need, which are (practically) always in your package manager for you to install. This will very much depend on what particular distribution of Linux you’re using. If your distribution of Linux is a fork of Debian, I have this guide for you based on my trials and tribulations over the years.
- Chromebook: Students who self-select into Linux know what they signed up for, but students who have Chromebooks do not know they signed up for Linux. Read this guide to further assist you. It is understandable that students purchase Chromebooks for university education because they anticipate only needing something with a keyboard that is capable of checking email and writing documents. It is unfortunate that Chromebooks are lousy computers for situations like this. Students may want to invest in a free posit Cloud account if this is the situation in which they find themselves. Apparently, the language studio has R and RStudio installed on their computers.