Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 527
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:
I just bought this pharma stock for its next generation of blockbuster drugs — and its dividend
Stock futures are mixed as traders await Fed decision, Big Tech earnings: Live updates
Trump administration may let more Russian diesel onto market, energy secretary tells CNBC
Jim Cramer warns investors not to get fooled by the latest AI stock rally
Trump jokes $5,000 would buy 'a hamburger and maybe a small dessert' at Mar-a-Lago as cost of living looms over midterms
Amazon's anti-tokenmaxxing memo says engineers should be pickier about using AI
Trump says Iran war will end 'when I want it to' as costs reportedly balloon to $47 billion
Chart: Anthropic's cash pile towers over nearly every U.S. company
St. Louis Fed's Musalem: Another rate hike needed 'soon'
Movie: Primetime