Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 310
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:
Movie: Death at a Funeral
Led by Buc-ee’s and new rival Dolly Parton, America’s gas station chains are in a mega-sizing era
Most prediction market contracts have low volume, leaving users exposed to volatility and bots
Jeff Bezos' family office backed five AI startups in June
U.S. closes 2022 probe into 695,000 Tesla vehicles over unexpected braking
Tesla stock sinks 7% despite strong deliveries report
What became of the youngest Agees?
What's the Frequency? Recommend me some radio!
Star City: Plow Deep
My bra keeps touching me. It's too hot for this.