Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 487
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:
Inflation fears on the rise as one-year outlook in Fed survey hits highest level since May 2023
SpaceX’s plans to buy more Nvidia GPUs is keeping Jim Cramer bullish on the chip stock
Barclays sees big haircare gains for this consumer stock as shoppers prioritize self-care
Scrolling alternatives for Samsung Android?
Movie: Queen Margot
Movie: Digger
The Great British Bake Off: Biscuit Week
Line of Fire: A Bigger Picture
Lanterns: Dirt and Stars
Snowpiercer: Bell the Cat Rewatch