To access Datastream, you must first create an LSEG Workspace account (formerly Refinitiv). After you have done that, please email lippincott@wharton.upenn.edu to request access. The Lippincott librarians will confirm that Datastream access has been added to your account.
After your account has been set up, download the LSEG Workspace for Desktop application. This includes the platform software and the Excel add-in. Once installed, you will see a Refinitiv tab/ribbon in Excel. Click Sign in and use the same user ID/password as for the regular LSEG Workspace for Students application. The Excel plug-in is only available for Windows.
Once you've logged in, click the Datastream Formula button to open up the series and datatypes entry window. Select the Filter icon next to the Series/Lists box to open up the Datastream Navigator to locate data series.
Some Datastream series are available via WRDS (see access details).