Thanks for presenting! The paper uses PCA to decompose the factors that explain the variation across counties. Since PCA finds a linear combination of defined variables, it is not easy to interpret. I am wondering the reason to choose PCA rather than other feature selecting method.
Thanks for presenting! The paper uses PCA to decompose the factors that explain the variation across counties. Since PCA finds a linear combination of defined variables, it is not easy to interpret. I am wondering the reason to choose PCA rather than other feature selecting method.