## Search found 7 matches

Wed Aug 21, 2013 4:30 am
Forum: Econometric Discussions
Topic: Help interpreting second differences
Replies: 1
Views: 3433

### 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...
Wed May 22, 2013 3:00 am
Forum: Econometric Discussions
Topic: Panel data, fixed or random effects estimation?
Replies: 2
Views: 10366

### 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...
Wed May 22, 2013 2:39 am
Forum: Econometric Discussions
Topic: Fixed effects - subsamples instead of dummy variables
Replies: 1
Views: 1571

### Re: Fixed effects - subsamples instead of dummy variables

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

Thu May 16, 2013 4:30 am
Forum: Econometric Discussions
Topic: Beginner - Different multiple regression problems
Replies: 3
Views: 2412

### 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 ...
Tue May 14, 2013 3:30 am
Forum: Econometric Discussions
Topic: large time series database
Replies: 1
Views: 1488

### Re: large time series database

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: 3391

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

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

Code: Select all

series fincris = @recode(@year>2008, 1, 0)
Sat May 11, 2013 7:16 am
Forum: Econometric Discussions
Topic: Fixed effects - subsamples instead of dummy variables
Replies: 1
Views: 1571

### 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...