Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 235
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:
Weekend in Austin, TX without rental car, good idea or not?
Asia’s rich fear losing the family fortune — but many still have no succession plans, survey shows
Nokia doesn’t make phones anymore. So how does it make billions?
New: Earn up to 90,000 bonus points with these limited-time Southwest credit card offers
The ECB is in a bind over rate hikes — the private sector could be doing the bank's job for it
Tesla Robotaxi fleet in Texas less than one-tenth size of Waymo's, filings reveal
I was at the exclusive launch of Ferrari's new EV that sent the stock tumbling. But there may be light at the end of the tunnel
Is there a (cheaper) hack for this biofeedback thing?
Movie: Backrooms
Disney's ABC files early broadcast licenses renewal 'under protest' against the FCC