COUNTER defines how this should work, see specifically points d. and e
below ( from p.32 under Return codes and time filters, at
http://www.projectcounter.org/r3/Release3D9.pdf)

"c. All users' double-clicks on an http-link should be counted as only 1
request. The time
window for occurrence of a double-click should be set at 10 seconds
between the first and
the second mouse-click.
There are a number of options to make sure that a double click comes
from one and the
same user:
1. where only the IP address of a user is logged that IP should be taken
as the field to
trace double-clicks
2. when a session-cookie is implemented and logged, the session-cookie
should be used
to trace the double-clicks.
3. when user-cookies are available and logged, the user-cookie should be
used to trace
double-clicks
4. when the username of a registered user is logged, this username
should be used to
trace double-clicks.
The options 1 to 4 above have an increasing level of reliability for
filtering out double-clicks:
option 1 has the lowest level of precision (and may lead to under
reporting from the vendor
perspective) while with option 4 the result will be optimal.

d. The downloading and rendering of a PDF takes longer than the
rendering of an HTML
page. Therefore requests by one and the same IP/username/session- or
user cookie for
one and the same pdf should be counted as a single request if these
multiple requests
occur within a 30 seconds time window. These multiple requests may also
be triggered by
pressing a refresh or back button on the desktop by the user.

e. When two requests are made for one and the same article within the
above time limits (10
seconds for HTML, 30 seconds for PDF), the first request should be
removed and the
second retained. Any additional requests for the same article within
these time limits should
be treated identically: always remove the first and retain the second.
(For further
information on the implementation of this protocol, see Appendix D:
Guidelines for
Implementation)"


Does anyone know how this is monitored?  

Andrea
********************************
Andrea Imre
Electronic Resources Librarian
Southern Illinois University Carbondale
Morris Library
605 Agriculture Dr
Carbondale, IL 62901
phone: 618-453-4339
fax:  618-453-3452
e-mail: [log in to unmask]





-----Original Message-----
From: [log in to unmask]
[mailto:[log in to unmask]] On Behalf Of Crawshaw, Lesley
A
Sent: Thursday, July 09, 2009 6:25 AM
To: [log in to unmask]
Subject: RE: [lib-stats] Cost per use

Hi Chan,

It is a very interesting question.

However, I understood that the COUNTER standard prevented this possible
hyping of usage. I understood that if the html was the first full text
content accessed followed by the downloading of the full text pdf that
this usage would only count once not twice.

Could someone more expert in COUNTER advise me if this is incorrect?

Cheers
Lesley


Lesley Crawshaw
Knowledge &  Business Intelligence Consultant
Learning and Information Services
University of Hertfordshire
Tel: 01707 284662

Joint List Owner: [log in to unmask]

-----Original Message-----
From: [log in to unmask]
[mailto:[log in to unmask]] On Behalf Of Hana Levay
Sent: 08 July 2009 21:58
To: [log in to unmask]
Subject: Re: [lib-stats] Cost per use

Hi Chan,

At University of Washington we've been starting to look at cost per use
for html or pdf downloads, versus total downloads.

When you look at various platforms, they might for example force the
user to view the HTML before downloading the PDF, and so artificially
raise downloads for HTML uses.

We've tried finding cost per use for PDF only, and also tried PDF + 15%
of the HTML downloads. We use 15% as a baseline, but have seen HTML
percentages range from 4% to 122% of the PDF downloads.  Using 15% as a
baseline, one e-journal package went from $0.67 cost per use up to $1.09
cost per use.

This is still very much in the experimental stage, and isn't affecting
decisions at this time. But it is an interesting question.

Hana

Chan Li wrote:
> Hello,
>
> I have a general question for this group. When you study the full-text
> download usage for your resources or calculate the cost per use, are
you
> counting PDFs only or all downloads including HTMLs and PDFs? I think
> that the cost per use for some packages might be so different between
> counting only PDF uses and counting both.
>
> Any advices would be helpful,
> Chan
>
> Chan Li
> Data Analyst
> California Digital Library
> University of California, Office of the President
> Tel: 510.987.9796
> Email: [log in to unmask]
>
>
> -----Original Message-----
> From: [log in to unmask]
> [mailto:[log in to unmask]] On Behalf Of Celeste
Feather
> Sent: Tuesday, July 07, 2009 12:27 PM
> To: [log in to unmask]
> Subject: Re: [lib-stats] Cost per use
>
> Our OhioLINK consortium multi-publisher journal collection last year
had
>
> an average DL cost of $4.00. The range was from $2 to $26. Needless to
> say, in these times those publisher packages at the high end of the
> range are not looked at very favorably.
>
> Celeste
>
> Lancaster, Charla Michelle wrote:
>> Good Afternoon everyone!
>>
>> As I look at how we are using our online collection in terms of
>> downloads, I'm wondering if anyone has decided upon a threshold in
>> which your library has determined the cost outweighs the benefits of
>> retaining an online database or e-journal. I realize many factors go
>> into the ultimate decision, but some sort of guidance on a monetary
>> amount would be useful. While $50.00 per download is too high, is
>> $10.00? $2.00?
>>
>> I would be interested in hearing what your library has done in this
> area.
>> Thanks!
>>
>> Charla
>>
>> Charla Lancaster
>>
>> Collection Development Specialist
>>
>> Indiana University
>>
>> Wells Library E-1052
>>
>> 1320 E. 10th St.
>>
>> Bloomington, IN 47405
>>
>> Phone: 812-856-6842
>>
>> Fax: 812-855-8068
>>
>