N Parameters

We are using data from Gerber, Green, and Larimer (2008) to figure out which type of postcard is most effective. We do not know if we can assume Unconfoundedness. We modeled primary_06, variable indicating whether the participant voted in the 2006 primary election, and the type of postcard they recieved. People who have been voting in the past are more likely to vote again. We know that the “Neighbors” type of postcard is the best, with a bit of uncertainty.

\[y_{i} = \beta_{0} + \beta_{1} age\_z + \beta_{2}male_i + \beta_{3}civic\_duty_i + \\ \beta_{4}hawthorne_i + \beta_{5}self_i + \beta_{6}neighbors_i + \\ \beta_{7}Sometimes\ vote_i + \beta_{8}Always\ vote_i + \\ \beta_{9}civic\_duty_i Sometimes\ vote_i + \beta_{10}hawthorne_i Sometimes\ vote_i + \\ \beta_{11}self_i Sometimes\ vote_i + \beta_{11}neighbors_i Sometimes\ vote_i + \\ \beta_{12}civic\_duty_i Always\ vote_i + \beta_{13}hawthorne_i Always\ vote_i + \\ \beta_{14}self_i Always\ vote_i + \beta_{15}neighbors_i Always\ vote_i + \epsilon_{i}\]