Nothing
suppressMessages(require(dplyr))
sample_names_data <- c("jane", "jane", "madison", "madison")
sample_years_ssa <- c(rep(c(1930, 2010), 2))
sample_years_ipums <- c(rep(c(1830, 1880), 2))
sample_names_df <- tibble(names = sample_names_data,
years = sample_years_ssa)
sample_names_df_big <- bind_rows(sample_names_df, sample_names_df)
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