Read the section “4.4. Robustness checks” of this article.What aspects do the robustness checks cover in this article?
A.
The coefficients on log English across the different estimation methods.
B.
The consequences of using different bilateral measures of English proficiency
C.
The issue that the possibility that the mean TOEFL score might be associated with the size of the pool of examinees in each country, which could in turn affect the results of our regression analysis.