Scope and Methods

Columbia University

Sam Frederick

Scope and Methods

Columbia University

Sam Frederick

Date Slides Topics Data
May 22 Intro to R Setting working directory and RProjects; RScripts and RMarkdown files; basic functions in R
May 24 Intro to R Basic functions in R; types of data in R; reading data into R
May 31 Types of Data in R Types of Data in R; conditional logic 2020 Campaign Finance Data *
June 2 Intro to dplyr Overview of key functions in dplyr (filter, select, mutate, and joins)
June 5 Intro to ggplot Plotting in ggplot; creating visual summaries of 1, 2, 3, and more variables
June 7 Intro to t-tests Law of Large Numbers; Central Limit Theorem; Confidence Intervals; Hypothesis Testing
June 12 Tables, Chi-Squared Tests, and Correlation Coefficients Making tables in R; applying survey weights; Chi-Squared Tests; Correlations CES 2020 Example **
June 14 Intro to Regression Causality; Confounding variables/Omitted Variables Bias; Bivariate Regression; Multivariate Regression; Making nice regression tables

Regression Data

Regression Data (with Confounder) ***

June 21 Dummy Variables, Dot-and-Whisker Plots, and Predictions Dummy/indicator variables in regression; creating visual summaries of regression models; making predictions from regression models
June 23 Interaction Effects and Marginal Effects Understanding and interpreting interaction effects; estimating and visualizing interactions; estimating marginal effects in R
* Note: Preliminary data from the Federal Elections Commission, should not be relied upon for analysis
** Data are a random sample of 1,000 from the 2020 CES Common file.
*** Data are simulated (fake) data for illustrating regressions and confounding/omitted variables bias.