Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 257
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:
Hidden beneath AI chips, Chinese-made circuit boards raise national security concerns in U.S.
Tire giant Pirelli vows legal action as short seller alleges ‘close relationship’ with Russia
SoftBank shares plunge over 11% amid broader tech sell-off
As Honeywell Aerospace readies for its stand-alone debut, its CEO is forecasting big growth
Interesting Quiet/Lesser Known Places To Go In Europe
Widow's Bay: Your Baggage
Book: Against the Gods: The Remarkable Story of Risk (1996)
Investors can 'buy' SpaceX early with Coinbase perpetual futures on pre-IPOs
Amazon engineers in Seattle slam employer for building AI data centers while laying off 30,000 staffers
Flesh-eating screwworm is confirmed in the U.S., officials say