The Tobit Model

The tobit model is one of those models that is so neat in theory, but rarely seen in practice.
I wrote a short R script to show the benefits of the tobit model, here is the outcome:

You can download the R-script here.

Interesting instrument

Figlio, D. (2007): “Boys named Sue: Disruptive children and their peers,”
Education Finance and Policy, 2(4), 376–39

- Uses the fraction of boys with feminine names as an instrument for disruptive classroom behavior.

I’m back…

and my objective is to provide procrastination for economists out there… And maybe some latex support as well. Let me start with a brilliant photo from the Social Sciences Library at the University of Copenhagen. Taken at the smokers corner:

The art has unfortunately been removed now.

a short note for a useful excel macro

Yesterday I wanted to make a scatterplot with excel, but this brilliant program is not able to put labels on the dots (unless you are really bored and want to assign each one manually). It is quite easy to find a macro for this problem if you search for it, but I find most of them way too complicated. And yestreday I was not able to find or recreate the one I once used, but now I managed. So here it is (and next time I know where to look for it):

Sub AddLabels()
Dim RngLabels As Range
Dim Ser As Series
Dim i As Long
If TypeName(Selection) = “Series” Then
Set Ser = Selection
Set RngLabels = Application.InputBox(prompt:=”Select the label range:”, Type:=8)
Ser.HasDataLabels = True
For i = 1 To Ser.Points.Count
Ser.Points(i).DataLabel.Text = RngLabels(i)
Next i
Else
MsgBox “Select a series”
End If
End Sub

I did not write it myself but don’t know where I have copied it from (but many thanks to the original author). For openoffice users I can happily say, that you don’t need a macro, the program is clever enough to have this function…