Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 528
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:
Early third-quarter earnings show a 'resilient' U.S. consumer, with signs of strain
Polymarket faces renewed CFTC probe over U.S. access to offshore platform
Amex Platinum and Business Platinum add Airbnb perks, but lodging credit rules are tightening
Jim Cramer warns investors not to get fooled by the latest AI stock rally
How investors can position ahead of the Fed's next policy decision
SK Hynix shares jump 11% after record quarterly profit, outperforming broader market
Neil Young sues Trump committee for $10M for playing 'Rockin' in the Free World' at rally
How should I word these emails to sell my deceased husband's domain?
Israel election appears to have no clear winner with Netanyahu, opponent Eisenkot far short of majorities
Treasury Department announces new Series I bond rate of 5.51% for the next six months