Discover and read the best of Twitter Threads about #proact

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Gallup recently put the popularity of unions at 62 percent—a 15-year high. #1u #proact #hr2474
The @WSJ reported that 2018 was the biggest year for collective action in three decades. Teachers from West Virginia to Arizona. Google employees. Workers in every sector and every region are embracing the transformational power that comes from joining together in common cause.
@MIT found that half of non-union workers would vote to join a union today if given the chance. That’s more than 60 million Americans.
Read 12 tweets
Inspired by a question from @Econdoor , a #tweetorial about instrumental variables and the exclusion restriction.

#econtwitter #epitwitter #FOAMed
First, instrumental variables and causal graphs:

An instrument is a special type of variable that is associated (causally or otherwise) with the exposure you’re interested in.

The directed acyclic graph (DAG) below shows the basic required structure.
There are three key requirements for a variable to be an instrument:
•it is associated with the exposure
•it is not associated with the outcome EXCEPT through exposure
•it does not share any causes with the outcome (ie unconfounded).

We have these 3 properties in our DAG👇🏼
Read 26 tweets

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