Why would someone copyright a web page? The same reason as some would copyright anything else: to prevent another person from taking an authors work and calling it their own, and to allow the author to profit (or otherwise benefit) from his/her original efforts.
So, for example, suppose I wrote a detailed discussion of some arcane academic
topic such as a review and evaluation of goodness-of-fit indices in structural
equation modeling. And then suppose I wanted to use that as a basis for a later
journal article or book chapter on the topic, since, like all research-oriented
academics, my career advancement is heavily influenced by my publication track
record. Then suppose the article was rejected, because someone else had taken
my words and already published them, perhaps changing them a little to make
it look less obvious. How would you feel?
It should be noted that under copyright law, most work is
automatically considered the property of the author even without a
specific copyright notice; the inclusion of such notices is provided
as a reminder to discourage copying. So you can go after someone who
steals your work even if you dont say "Copyright © 1996
Pat Jones."
The copyright law of the United States (and other developed
countries) allows for the doctrine of "fair use," which is
particularly broad for academic research and scholarship. You can
read it, quote it, and use it to prepare other materials. For
example, much of the work Ive done in these pages on structural
equations has been by reading through stacks of copyrighted books and
journal articles, and such compilation, summary and synthesis are
considered "fair use."
The difference between fair use and plagiarism should be a matter of
common sense, and generally people know when theyre abusing it.
But if youre not sure, please feel free to ask.
In addition to fair use, with regards to these particular web pages, I grant these additional rights to my work:
A word of caution on linking: these pages are subject to change
and may be moved or renamed, so the URL you include on your web page
may (as with references to any other site) someday become
obsolete.
To minimize such problems, I will attempt to maintain permanency of
URLs within two guidelines:
So the links
are (relatively) permanent, while links such as
are more likely to become obsolete.
If you link to any of these pages, please send me an E-mail
letting me know what youve linked to, and Ill try to let
you know if something changes.
Of course, as with all the other web pages Ive written, I
welcome your comments, questions and feedback on this discussion of
copyright.