Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 531
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:
Polymarket faces renewed CFTC probe over U.S. access to offshore platform
Trump administration may let more Russian diesel onto market, energy secretary tells CNBC
Trump jokes $5,000 would buy 'a hamburger and maybe a small dessert' at Mar-a-Lago as cost of living looms over midterms
Wednesday's big stock stories: What’s likely to move the market in the next trading session
Oil prices rise as Houthi attacks on Saudi Arabian refinery raise supply worries
Art and other things in cans
St. Louis Fed's Musalem: Another rate hike needed 'soon'
Chevron and Exxon hit all-time highs as refining profits soar in reaction to Iran and Ukraine wars
Treasury Department announces new Series I bond rate of 5.51% for the next six months
Movie: Dogra Magra