17.871 Spring 2012 Group Projects: Further Guidance Assignment summary Working with your assigned group, answer the question posed to you. Each of the questions can be answered with regression analysis, and I would prefer to see at least one regression reported in your presentation. For your presentations, please e-mail me the slides you will use well in advance of class, so that I can ensure that they will load on my computer, and so that I can spot any obvious major problems, with the content or the length. For your paper, e-mail a copy to me by 5:00 pm on Friday, March 16 (as specified in the original assignment). Also, attach a Stata do-file and your data file that will reproduce the analysis you report. Grading rubric The following is the distribution of points for how the assignment will be graded: - Writing/Organization - 30 points - Lit. Review - 15 points - Data Collection - 15 points - Data Analysis - 20 points - Data Presentation - 20 points Presentation You should be able to make your presentation using five slides. Here they are: 1. Research question Pose your question What is the current state of academic thinking about your question? Develop a hypothesis about one key explanatory variable Explain why it’s important to democracy, public policy, etc. 2. Research design (methodology: usually regression) Describe dependent variable, key explanatory variable, control variables (justify the controls) Descriptive statistics (recode all to 0-1, present means and sds) 3. Bivariate relationship for key variable Scatter plot for continuous variables, box plots or crosstabs for nominal variables, label axes, label data points2 Present and interpret bivariate coef. (include a sentence on the slide), put regression line on scatter plot 4. Present and interpret multivariate regression coefficients Raw Stata output is okay, but only this time! Does adding the control variables to your regression change the results? Why? Interpret the coefficient with a sentence on the slide. Interpret SER (include a sentence on the slide!) 5. Conclusion What’s the most important inference? What are the policy implications or implications for democracy? How strong of an inference can we draw? Problems? Alternative explanations? - Internal validity? (Nonrandom selection and reverse causation) - External validity? Please practice your presentations and ensure that you are under 20 minutes! (Fifteen minutes is best. I won’t complain if you do a 10-minute presentation, if it covers all the bases.) Please bring copies of your slides for everyone in class. Finishing group projects can be difficult interpersonally. A surprisingly useful trick is to be kind in all your interactions with group
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