Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 224
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:
Wall Street and Main Street face off next week with Nvidia, consumer earnings. Here's what's ahead 
Why J&J thinks its new psoriasis pill could be one of its biggest drugs ever
Sundheim's D1 Capital bought several tech stocks last quarter — with one big exception
Trump says China and Taiwan should 'both cool it'
What are the current weather conditions in northern BC, AB, or SK?
ISO: Good board games for 2 people to play outside while waiting in line
What is this week's meal prep? Please share a recipe
Book: The Player of Games
For better or worse, investors are living through Trump’s stock market. Here's why
This federal program trains older workers. The Trump administration wants to cut it