Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 391
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:
The two 'HALO' stocks that haven't left Josh Brown's list since being added earlier this year
Hayden Panettiere, who starred in ‘Heroes’ and ‘Nashville,’ dies at 36
Depleted strategic oil reserve nears level that raises concerns about damage to caverns, operations
Medicaid estate recovery -- questions
Movie: Normal
Meta faces ‘astronomical’ consequences as legal fight reaches critical moment in California
Stanley Druckenmiller loaded up on Amazon and chip stocks before July rout
Supreme Court again rejects Trump bid to overturn E. Jean Carroll verdict
Nvidia financing initiative follows SEC guidance that takes sponsors off the hook for data center investments
Chart analyst says it's time to hedge. The typical midterm election year turbulence starts this week