Tag Archives: Reader Comments
RD News
Help is at hand from Calonico, Cattaneo, and Titiunik Three (3) new Stata commands, no less! rdrobust: new robust, bias-corrected confidence intervals rdbwselect: bandwidth selection this way and that rdbinselect: Automated binwidth selection for those figs where you’re not doing any smoothing
Signs of aging …
From: Martin Van der Linden In chapter 1 page 6, you mention the case of the effect of start age on results in school as and example of fundamentally unidentified questions. Do you mean that what cannot be assessed experimentally is the very effect of starting school later because a student who starts school at […]
Our Chicago Connection
http://theincidentaleconomist.com/wordpress/dont-forget-the-t-shirt/ Thanks Austin!
Fixed effects (DD) and LDV bracketing example
On p. 246, we reference Guryan (2004) as a scenario where DD and lagged dependent variables methods bracket the causal effect of interest (see also Section 5.4) . . . except that the editors and/or referees wrote that out of Guryan’s script. This argument does appear, however, in his 2001 working paper, available here
Published June 8, 2012 | Also tagged Corrections, difference-in-differences, Questions | Leave a comment
Testing DD
Jessie asks: Is there a nonparametric (or parametric) test that can be used to test whether the treatment and control group are similar in difference-in-difference before the treatment occurs? For example, in the Card-Krueger minimum wage example (Figure 5.2.1), would there be a test to check whether the trend in the employment rate was statistically […]
QOB Qonfusion
Ilyssa wonders Question: In Table 4.1.1 (p. 124), how are there 30 instruments in Column 8 rather than 27 (= 3 qob dummies * 9 year of birth dummies)? Why indeed? There are still 3 QOB main effects. JA
Imbens and Angrist Discover LATE
… in the the Andean foothills, Chile, November 2011
Hey baby, what’s your name?