Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 275
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:
Analysis: Chairman Kevin Warsh’s task forces are the key to understanding the new Fed
Financials have the market's deepest bench of near-breakouts
Can you get a loan for a wedding? The do's, don'ts and alternatives
Mr. Queen: Full season
A Man on the Inside: Group Project
Star City: Dark Forest
Separating hobby and work
Stock futures rise as Fed hints at possible rate hike in 2026; Kospi hits over 9,000 for the first time: Live updates
China to return as major oil buyer in August, JPMorgan says, naming its top stock picks
Google Gemini co-lead Noam Shazeer leaves for OpenAI