Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 419
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:
Broadcom debt deal expected to reach upwards of $70 billion, sources say
Pentagon fires U.S. military newspaper leadership
Bitcoin surges 22% for the week as investor optimism floods back
International student enrollment falls amid tighter U.S. visa policies, reports show
Gift ideas for a 6 year old engineer!
Book: Red Dragon
Movie: Police, Adjective
Movie: Handsome Guys
Dow surges 500 points Friday, but index posts back-to-back weekly losses
Six investors reveal the biggest market risks — and one strategy they agree on