[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: Propensity score matching in a panel

From   Jan Pettersson <[email protected]>
To   [email protected]
Subject   st: Propensity score matching in a panel
Date   Fri, 15 Jan 2010 16:06:59 +0100

Any help on the following would be greatly appreciated.

I have a panel with treated and controls (potential twins) in which treatment occurs in different years and twins should be found in the same year as treatment, so I cannot simply pool the data.

My first idea was to estimate propensity scores for each year separately (using 'pscore'), then adding the propensity scores together and thereafter estimating the att (using 'attnd') while taking the bootstrap sample from respective year using strata(year) as:
attnd outcome treat, pscore(mypscore) comsup boot strata(year).

An additional problem is that in some years only one individual is treated leading to a singleton treatment dummy.

Any comments on why this might be considered crazy and how to proceed?

Best wishes,
Jan Pettersson

*   For searches and help try:

© Copyright 1996–2024 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index