Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 408
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:
Bessent's bond gambit aimed at calming markets is instead stirring inflation worries
Ken Griffin says Citadel unwound more than 80% of risk tied to Situational Awareness portfolio
Trump admin taps former JPMorgan Chase exec Matt Zames to advise Social Security agency
Bitcoin surges 22% for the week as investor optimism floods back
Movie: American Doctor
Star Trek: Strange New Worlds: Level-Five Transporter Accident
Book: The Lives Of The Muses: Nine Women & the Artists They Inspired
Stargate SG-1: Sentinel Rewatch
Six investors reveal the biggest market risks — and one strategy they agree on
U.S., Canada fail to reach a tariff deal, deepen trade war