class: center, middle, inverse, title-slide # 400 Level Info Night ## Econ 474 - Fall 2021 ### Marcelino Guerra ### April 14, 2021 --- # Beyond correlation on social sciences <div id="htmlwidget-3a9a2bd5af7648de1de7" style="width:1100px;height:500px;" class="plotly html-widget"></div> <script type="application/json" 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The goal is to have a strategy that makes the groups choosing different paths as similar as possible The best way to find answers to causal questions is through randomized trials. However, that can be expensive, time consuming and (sometimes) unethical **The causal effect of CoronaVac on** 1. Number of symptomatic Covid-19 Cases 2. Disease severity * 9,823 participants (healthcare professionals) received two shots: 4,953 in the vaccinated group, and 4,870 in the placebo group * The random assignment and the large number of participants make the vaccinated and the placebo group, on average, very similar - you are comparing apples to apples! ] .pull-right[  **Source**: Palacios et al. * 253 confirmed COVID-19 cases in the cohort: 85 among the vaccinated group, 168 among the placebo group. 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