gesisdata: Reproducible Retrieval of GESIS Data Archive Datasets

Frederick Solt

2020-06-26

The GESIS Data Archive makes available thousands of invaluable social scientific surveys, including, among many others, the ALLBUS, the European Values Survey, the Eurobarometer, and the International Social Survey Program. Researchers taking advantage of these datasets, however, are caught in a bind. The archive’s terms and conditions bar dissemination of downloaded datasets to third parties. But to ensure that one’s work can be reproduced, assessed, and built upon by others, one must provide access to the raw data one employed.

The gesisdata package cuts this knot by providing programmatic, reproducible access to specified GESIS datasets from within R for registered users.

Setup

When used interactively, the gesis_download function will ask for the login information required by GESIS: the registered user’s email, password, and the use to which the data will be put. After that information is input once, it will be entered automatically for any other download requests made in the same session. To change this contact information within a session, one may set the argument reset to TRUE when running gesis_download again, and the function will again request the required information.

An optional, but highly recommended, setup step is to add the information that GESIS requires to your .Rprofile as in the following example:

options("gesis_email" = "[email protected]",
        "gesis_password" = "password123!",
        "gesis_use" = 5)

The gesis_download function will then access the information it needs to pass on to GESIS by default. This means that researchers will not have to expose their info in their R scripts and that others reproducing their results later—given that they have registered as users with GESIS—will be able to execute those R scripts without modification. (They will, however, need to enter their own information either interactively or in their own .Rprofiles, a detail that should be noted in the reproducibility materials to avoid confusion.)

Use

The gesis_download function (1) simulates a visit to the GESIS log-in page, (2) enters the required information to sign in, (3) navigates to a specified dataset and downloads the dataset’s files, and, optionally but by default, (4) converts the dataset’s Stata-formated files to .Rdata format.

Datasets are specified using the file_id argument. GESIS uses a unique number to identify each of its datasets. This number consistently appears alongside the dataset’s name; it is also listed as the “Study Number,” and it can be found at the end of the dataset’s URL as well. For the cumulative Politbarometer, for example, the file id is ZA5100:

To reproducibly download this dataset:

gesis_download(file_id = "ZA5100",
               download_dir = tempdir()) # remember to specify a directory for your download

Multiple datasets may be downloaded from the same research area in a single command by passing a vector of ids to file_id. The following downloads the Politbarometer cumulative file along with Eurobarometer 84.4 and the ISSP Role of Government V:

gesis_download(file_id = c("ZA5100", "ZA6644", "ZA6900"),
               download_dir = tempdir()) # remember to specify a directory for your download

After the needed datasets (and, if available, their codebooks) are downloaded, the datasets are by default converted to .RData format and ready to be loaded into R using load() or rio::import().

politbarometer <- rio::import(file.path(tempdir(), "ZA5100", "ZA55100_v2-0-0.RData"))