User’s Guide : EViews Fundamentals : Series Links
  
Series Links
The series link object (or link, for short) provides you with powerful tools for combining information from different workfile pages. Links provide an easy-to-use interface to a wide range of sophisticated data operations such as:
merging data from one workfile page into another
saving “by-group” summary statistics into a workfile page
matching observations between dated workfile pages
performing frequency conversion between regular dated workfile pages
Links operate both dynamically and on demand, so that the desired operation is performed only when needed, and is updated automatically whenever your data change.
You may find that working with links is in many ways similar to working with data tables in a relational database management system. Indeed, links have specifically been designed to provide much of the power of these sophisticated systems. But you need not have worked with such a system to take advantage of the power, ease-of-use, and flexibility associated with link objects.
Note that you may also use auto-series to work with data on other workfile pages. This method is easier than creating a link object, but more limiting (“Auto-series Across Pages”).
We begin with a discussion of basic link concepts that outlines the basic operations supported by links. In later sections we document the use of links in EViews.