Blog Archives

Three Questions about a Matrix of Coefficient Plots

July 4, 2012
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It's Independence Day in the U.S., so I am taking the day off, but I received the following request for advice and thought I'd pass it along to my readers. I wonder if you could help – I am trying to create 9 different coefficient plots , which repr...

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An Improvement to Coefficient Plots

July 3, 2012
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I recently posted about coefficient plots, discussing my approach and providing some example R code to create the graphs. I had the good fortune of hearing Amanda Driscoll give a talk recently, and she made a small, but really nice … Continue rea...

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Coefficient Plots in R

June 30, 2012
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One popular trend in presenting results is the "coefficient plot," an alternative to the table of regression coefficients. I am seeing this a little more often in political science research and have received a few requests for code, so I … Contin...

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Why You Shouldn’t Conclude "No Effect" from Statistically Insignificant Slopes

June 16, 2012
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It is quite common in political science for researchers to run statistical models, find that a coefficient for a variable is not statistically significant, and then claim that the variable "has no effect." This is equivalent to proposing a research &#8...

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Multiply Imputing an Outcome Variable

October 12, 2011
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Some scholars suggest that multiply imputing an outcome variable is incorrect. I use intuition and simulation to argue that multiply imputing outcomes can drastically improve estimates, even in the case of non-ignorable missingness. Continue reading &#...

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Using Inkscape to Post-edit Labels in R Graphs

September 26, 2011
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I discuss how to use Inkscape to easily shift around labels on graphs produced in R. Continue reading →

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R Code for Bow Tie Plots

August 22, 2011
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Earlier, I discussed the nice properties of bow tie plots for visualizing and understanding inferences from simple randomized treatment experimental designs. R code to quickly create these plots is available here. You can use the command source("htt...

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