July 2015
Intermediate to advanced
351 pages
10h 2m
English
Content preview from Exposure-Response Modeling
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Confounding bias and caus al inference in exposure–response modeling 233
is a confounding factor and it controls the exposure di via a logistic model.
The ER model is fitted by simple LS, IP W with exac t and estimated weights,
respectively.
> nsimu=10000
> male=rep(0:1,nsimu/2)
> pi=1/(1+exp(male))
> di=rbinom(nsimu,1,pi)
> yi=di+male+rnorm(nsimu)
> pdi=predict(glm(di~male))
> pwei=ifelse(di==1,pdi,1-pdi)
> wei=ifelse(di==1,pi,1-pi)
> lm(yi~di)
Coefficients:
(Intercept) di
0.5716 0.7959
> lm(yi~di,weight=1/wei)
Coefficients:
(Intercept) di
0.4816 1.0383
> lm(yi~di,weight=1/pwei)
Coefficients:
(Intercept) di
0.4827 1.0360
The following table shows the mean and SD of the three estimates (IPW1 and
IPW2 are estimates with e xact and e stimated propensity, respectively) ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.