Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 296
I'm trying to show a summation for observations i to n, starting with i = 1, that is only applied when another variable (treatment) is equal to 0. What's the correct notation for that?

The idea that I'm trying to turn into mathematical notation is "Each control unit in a given stratum has an uncorrected weight equal to (the unit's survey weight divided by the sum of all survey weights of control units in that stratum) multiplied by (the sum of all survey weights of treatment units in that stratum)," if that helps for context. I feel very self-conscious asking this question; please be kind.
Number of Comments
Please click Here to read the full story.
 
Other Top and Latest Questions:
Trump says 'everybody's profiting' from recent market rallies — but it’s mostly the 1%
Why Jim Cramer says investors should 'want to own' this industrial stock
Autonomous drone startup Quantum Systems raises $1.2 billion as investors pile into defense
Jeff Bezos' family office backed five AI startups in June
Google loses fight over record $4.7 billion EU antitrust fine
Book: The Sword of the Lictor
Movie: The Last Viking
Movie: Voicemails for Isabelle
Movie: The Way Back
Led by Buc-ee’s and new rival Dolly Parton, America’s gas station chains are in a mega-sizing era