Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 434
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:
Tehran won’t surrender to the U.S., Iranian President Pezeshkian says, as India's Modi urges dialogue and peace
Here are the 2 big things we're watching in this week's stock market
Goldman picks China healthcare stocks for a post-AI trade
A Fed hike next week seems certain after the latest inflation data. Here's what's ahead
Taxing high earners to help fund Social Security gains bipartisan attention — what it could mean for benefits
Book: The Dream Hotel
Snowpiercer: A Single Trade Rewatch
What is the name for the relaxation/sleep music I'm looking for?
Any recommendations of what to do in Paris.
I Customized KingMedia & Q2A – My AlGhorba.com Project + Free Help for Q2A Users