Search found 7 matches

by NicV
Wed Aug 21, 2013 4:30 am
Forum: Econometric Discussions
Topic: Help interpreting second differences
Replies: 1
Views: 2806

Help interpreting second differences

Dear all, Panel unit root testing shows me that most of my variables suffer from non-stationarity, and are first-difference stationary. A couple of my variables however are second-difference stationary. In have included a screenshot below for reference. Here you can see that I have twice differenced...
by NicV
Wed May 22, 2013 3:00 am
Forum: Econometric Discussions
Topic: Panel data, fixed or random effects estimation?
Replies: 2
Views: 9691

Re: Panel data, fixed or random effects estimation?

With fixed effects you can control for variables that are unobservable or for which you don't have data. It's a way to avoid omitted variable bias in your estimation. You use cross-section fixed effects if you think there are omitted variables that vary across entities (countries, companies, persons...
by NicV
Wed May 22, 2013 2:39 am
Forum: Econometric Discussions
Topic: Fixed effects - subsamples instead of dummy variables
Replies: 1
Views: 1178

Re: Fixed effects - subsamples instead of dummy variables

Anyone?
I tried several econometrics textbooks, but couldn't find anything on it.

Thanks in advance for your help!
by NicV
Thu May 16, 2013 4:30 am
Forum: Econometric Discussions
Topic: Beginner - Different multiple regression problems
Replies: 3
Views: 1880

Re: Beginner - Different multiple regression problems

Regarding logs: in its basic form it depends on what kind of (interpretation of) output you want. Using logs both sides will give you elasticities, which may be more realistic than levels both sides as log-log would e.g. say that if GDP grows with 1%, the gold price increases with 0.5% per ounce as ...
by NicV
Tue May 14, 2013 3:30 am
Forum: Econometric Discussions
Topic: large time series database
Replies: 1
Views: 1075

Re: large time series database

The Maddison Project could help you find some of the data you are looking for: http://www.ggdc.net/maddison/maddison-project/home.htm
by NicV
Tue May 14, 2013 3:20 am
Forum: General Information and Tips and Tricks
Topic: How to structure panel data in order to use it in a model
Replies: 1
Views: 2886

Re: How to structure panel data in order to use it in a mode

Regarding your financial crisis dummy, a very helpful thread on dummy variables is the following: viewtopic.php?t=3840&f=4

So for your model you could create a dummy using the following code:

Code: Select all

series fincris = @recode(@year>2008, 1, 0)
by NicV
Sat May 11, 2013 7:16 am
Forum: Econometric Discussions
Topic: Fixed effects - subsamples instead of dummy variables
Replies: 1
Views: 1178

Fixed effects - subsamples instead of dummy variables

Dear all, I'm aware that I cannot use non-time-varying variables such as gender in cross-section fixed effects. I would, however, still like to check for such differences in my panel (in my case checking for differences between country subgroups like Latin America and Sub-Saharan Africa). Would it b...

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