Tagged Questions
2
votes
2answers
130 views
Causality, omitted variable bias
This might be a basic question, but I want to be sure that what I'm doing is right. I have a model that suggests that variable X causes both Y and Z. When I regress Y on X, or Z on X, I get positive ...
0
votes
2answers
84 views
Do we need Overlap/Common Support in case of a parametric regression?
If I want to make a causal statement based on selection on observables. One typically assumes "Common Support" (/"Overlap") - which means that for any value of the confounding variables X a unit i can ...
3
votes
2answers
180 views
How to avoid the problem of two-way causality?
I am studying the effect of social capital on households' income. I am doing multiple regression to estimate this effect. For this, I have households' income as dependent variable and social capital ...
6
votes
4answers
801 views
Why use control variables in differences-in-differences?
I have a question on the differences-in-differences approach with the following standard equation:
$$
y= a + b_1\text{treat}+ b_2\text{post} + b_3\text{treat}\cdot\text{post} + u
$$
where treat is a ...
3
votes
3answers
481 views
How much sub-questions impact one ordinal question in a survey
I have a variable NPS which is an item on a survey, the answer format is ordinal, 0 to 10.
Then there are sub-questions on the same survey, some are ordinal, some are categorical.
I would like to ...
