After recently having to think critically about the value of various R packages for social science research, I realized that others might find value in a post on “musthave” R packages for social scientists. After the immensely popular post on this topic for Python packages a followup seemed appropraite. If you conduct social science research but are desperately clinging onto your SAS, SPSS or Matlab licenses; waiting for someone to convince you of R’s value, please allow me to be the first to try.
R is a functional programming language that allows for seamless data exploration, manipulation, analysis and visualization. The community using and supporting the language has exploded over the last several years, which has lead to the development of several immensely useful packages, many of which have direct application in the social sciences. Below are the R packages I use on a weekly/daily/monthly basis (in no particular order) and highly recommend to any R users; new or old.
Zelig
Put simply, Zelig is a onestop statistical shop for nearly all regression model specifications. Using a uniform syntax across model types, and several extremely useful plotting functions, the package’s autor Gary King (Political Science and Statistics at Harvard University) calls Zelig “everyone’s statistical software,” which is a very accurate description. if there is one R package that every social scientist should have it is Zelig!
Download Zelig
ggplot2
One of the advantages of R as a functional language is it contains a set of convenient base functions for plotting data. While useful when exploring a dataset, they are–for lack of a better word–ugly, and this is where ggplot2 comes in. Using the Grammar of Graphics manifesto as a guide, creator Hadley Wickham designed ggplot2 to “take the good parts of base and lattice graphics and none of the bad parts,” and he succeed. This is the premier R package for conveying your analysis visually.
Download ggplot2
Statnet/igraph
I have combined the two competing network analysis packages in R into a single bullet because each has its strengths and weaknesses, and as such there is value in leaning and using both. The igraph package approaches network analysis from the mathematics/physics/graph theoretic perspective, including several advanced metrics and random graph models. In contrast, Statnet was primarily designed for social science, and its primary advantage is the inclusion of a series of functions for estimating and testing ERGM/p* graph models.
Download igraphDownload Statnet
plyr
Also brought to you by R guru Hadley Wickham, the plyr package assist reachers in the least glamorous aspect of their work—data manipulation and cleaning. One of R’s great advantages is its ability t handle very large datasets, and plyr is there to help you break these large data problems into smaller and more manageable pieces.
Download plyr
Amelia II
Also developed by Gary Kind, Amelia II contains a sets of algorithms for multiple imputation of missing data across a wide range of data types, such as survey, time series and cross sectional. As missing data problems are ubiquitous in social science research the functions contained in this package provide a powerful solution to these issues.
Download Amelia II
nlme
This package is used to fit and compare Gaussian linear and nonlinear mixedeffects models. For those examining complex time series data with various correlation structures the nlme provides a number of options for fits, tests and plotting.
Download nlme
SNOW/Rmpi
Unlike newer version of Python, the current build of R does not contain native functionality for distributing jobs across highperformance computing clusters. The SNOW and Rmpi packages provide this functionality, and are highly recommended to any researcher with access to an HPC environment running R.
Download SNOWDownload Rmpi
xtable/apsrtable
Both of these packages convert R summary results into LaTeX/HTML table format. The xtable package is a general solution, while the apsrtable package, developed by fellow political science grad student Michael Malecki, will output tables in the APSR format&mdas;for those of you fortunate enough to need to use this format.
Download xtableDownload apsrtable
plm
Got panel data? If so, you need plm, which contains all of the necessary model specifications and tests for fitting a panel data model; including specifications for instrumental variable models.
Download plm
sqldf
As I stated, R is great for dealing with large datasets; however, occasionally you will encounter a dataset so large that it can grind R’s base I/O functions to a halt. As the name suggests, the sqldf packages overcomes this by allowing uses to perfrom SQL statements directly on R data frames, greatly increasing efficiency.
Download sqldf
I hope that you will explore and use the packages above that you do not already have familiarity with. To those who have never used R and/or have an irrational phobia of the language, let this list provide the appropriate motivation. Also, to those R experts out there, I welcome any suggestions for more useful R packages for the social science inclined!
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