diff --git a/01_import.R b/01_import.R
index 66585c8..6965ced 100644
--- a/01_import.R
+++ b/01_import.R
@@ -35,5 +35,7 @@ source("functions.R")
 
 # Import data
 load("Datasets/seq_marital_1540.RData")
+
+# Download and import this file from the official CFPS website
 cfps2018_familyroster <- read_stata("Datasets/cfps2018_familyroster.dta") %>%
   mutate_all(funs(replace(., . < 0, NA)))