Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 540
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:
Kylian Mbappé faces China backlash as sponsors cut ties over viral meme
Early third-quarter earnings show a 'resilient' U.S. consumer, with signs of strain
I just bought this pharma stock for its next generation of blockbuster drugs — and its dividend
Polymarket faces renewed CFTC probe over U.S. access to offshore platform
Oil prices rise as Houthi attacks on Saudi Arabian refinery raise supply worries
Chart: Anthropic's cash pile towers over nearly every U.S. company
'Bad time to troll': Binance cofounder Changpeng Zhao asks Elon Musk for 'respect' after post about bitcoin hack
Intel heads for worst day on Wall Street in more than 50 years on weak guidance
Movie: Absurd
Special Event: Rifftrax: PLAN 9 FROM OUTER SPACE