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DS4PS / cpp-525-fall-2020

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Lab 2 Coefficients Meaning #7

Closed Niagara1000 closed 3 years ago

Niagara1000 commented 4 years ago

HI Prof @Dselby86 and @lecy ,

Can I please get an explanation of the variables/coefficients in this table? I am super lost and running out of time. I read through all the material for this week, and I am still stuck, and I don't know why. :(

I am attaching the picture below. This is part of Lab 2 where we analyze the effects of greening on vandalizing acts.

Screen Shot 2020-10-26 at 9 42 25 PM



Reference: https://ds4ps.org/pe4ps-textbook/labs/diff-in-diff-lab.html

Dselby86 commented 4 years ago

Intercept is the Average number of calls at the start of the study Treatment is the effect of being in the treatment group, but have not received the treatment Post Treatment is the effect of being in the control group during the Post-Treatment Period DIff in Diff is the effect of being in the treatment and having received the treatment

lecy commented 4 years ago

Just remember that the mean of each group is constructed by adding coefficients, so most cannot be interpreted directly:

image