jblumstein's comments

jblumstein | 8 years ago | on: Selection bias is the most powerful force in education

You say it better than I do. Agreed it's an extreme selection bias, just want to point out that it's slightly different than the one de Boer seemed to be pointing out.

jblumstein | 8 years ago | on: Selection bias is the most powerful force in education

Yah. It's weird that de Boer argues selection bias is in play in SAT participation between MS (3%) and CT (88%) when 100% of MS high schoolers take the ACT. That seems to be what's happening here: the kids in MS taking the SAT in addition to the ACT are the ones aiming for elite schools.

jblumstein | 9 years ago | on: Ask HN: What is the biggest untapped opportunity for startups?

Agreed. Interestingly, it seems McDonalds ends up being the physical space that plays this role for a lot of older folks, both in urban areas (Koreans in Queens, NYC) and rural areas (Chris Arnade has done a lot of interesting documenting of this phenomenon).