Access to The Economist is available electronically through the ProQuest One Business (1992 - present; with pdf format - including charts and images - covering the past few years) and Gale Business Insights (full text coverage from 1988 - present; abstracts going back to 1965), however, that content is limited to HTML format (not pdf) which means charts and images may not be included.
Economist Historical Archive may also be accessed from the Boston Public Library through a BPL ecard and this resource provides a completely searchable copy of every issue of The Economist from 1843 to 2014. While Boston University also has access to many years of older content through microfilm, it is much easier to access it through the Economist Historical Archive.