Mark book error? page 4- 45 (c-hat 1.127)???

[lyanneb]

I am working through the Mark book and I ran into a snag in Ch. 4, specifically in section 4.5 "Uncertainty and parameter values: a brief introduction to model averaging" (Page 4- 45).

I have followed the instructions twice and gone back, but can't figure out where and why I was supposed to put in the c-hat value of 1.127. I have figured out how, but I would like to know why it was added. If I follow the instructions without that c-hat value I can't replicate the results in the text or tables from that point forward.

The only information about c-hat is in the next chapter. Am I missing something here?

Thanks in advance.

[cooch]

I am working through the Mark book and I ran into a snag in Ch. 4, specifically in section 4.5 "Uncertainty and parameter values: a brief introduction to model averaging" (Page 4- 45).

I have followed the instructions twice and gone back, but can't figure out where and why I was supposed to put in the c-hat value of 1.127. I have figured out how, but I would like to know why it was added. If I follow the instructions without that c-hat value I can't replicate the results in the text or tables from that point forward.

The only information about c-hat is in the next chapter. Am I missing something here?

Thanks in advance.

You must be using an old(er) version of Chapter 4 (since current chapter 4, page 45 - dated May 6, 2009 - makes no mention of c-hat) - in early incarnations, a few errors (of a sort) like you describe crept in following the amalgamation of old chapter 4 and 6. I thought I'd eliminated most of those sorts of minor errors.

If you want the latest and greatest version of 'the book' (including chapter 4), simply download

http://www.phidot.org/software/mark/doc ... k_book.zip

[lyanneb]

Groan...You're right. I don't know how that happened because I downloaded it from the same site June 27.

I've printed Ch 4-7. In an effort to save some trees, would you recommend re-printing other chapters other than 4 and 6?

Thanks again for your help.

[cooch]

Groan...You're right. I don't know how that happened because I downloaded it from the same site June 27.

I've printed Ch 4-7. In an effort to save some trees, would you recommend re-printing other chapters other than 4 and 6?

Thanks again for your help.

Actually, I don't recommend printing anything. I recommend reading everything onscreen. In the modern era of decent monitors, there is less and less justification to kill trees. The old argument of 'I just need a paper copy' is not particularly sustainable in the modern era. I digress...

More to the point, I make semi-frequent 'tweaks', less frequent 'major changes'. The former I generally upload as individual chapters when I make the changes. The only indication you'll have is a new 'compile' time stamp in the lower right-hand corner of the first page of a given chapter.

Major changes involve two things: (i) upload of the individual changed chapter(s), and (ii) re-collation of the entire book (the single PDF file version of the book; all 800+ pages of it). Re-collating the book, re-indexing it, and generating normal portrait and landscape versions take a bit of time, so I don't do it very often. About once every couple of months. So, the individual chapters are always the most recent, with the fully collated book often lagging behind a bit (i.e., no reflecting all the changes to one or more individual chapters).

The usual (preferred) strategy I recommend to people who have found what they think is an error is to check their version against the version of that chapter that is online. If the putative error is also in the online version, then post a notice of it.

[lyanneb]

Ok, thanks for the advice.
Cheers.