Nothing
#### gen_a_finish fn ####
gen_a_finish <- function(a_res, my_estimand, wts){
if(my_estimand == "ATE"){
U1 <- stats::rnorm(a_res$n1)*sqrt(a_res$ve1) + a_res$b1*a_res$Rstar_1 +
a_res$es*(1-a_res$pi)
U0 <- stats::rnorm(a_res$n0)*sqrt(a_res$ve0) + a_res$b0*a_res$Rstar_0 -
a_res$es*a_res$pi
U <- rep(NA, a_res$n)
ind <- a_res$ind
U[ind] <- U1
U[-ind] <- U0
a <- rep(NA, a_res$n)
a[ind] <- 1 / wts[ind] + (1 - (1 / wts[ind])) *
(1 / exp(-a_res$es^2 * (1 - 2 * a_res$pi) / 2 + a_res$es * U[ind]))
a[-ind] <- 1 / wts[-ind] + (1 - (1 / wts[-ind])) *
(1 / exp(a_res$es^2 * (1 - 2 * a_res$pi) / 2 - a_res$es * U[-ind]))
} else if(my_estimand == "ATT"){
U0 <- stats::rnorm(a_res$n0)*sqrt(a_res$ve0) + a_res$b0*a_res$Rstar_0 -
a_res$es*a_res$pi
U <- rep(NA, a_res$n)
ind <- a_res$ind
U[ind] <- 1
U[-ind] <- U0
a <- rep(NA, a_res$n)
a[ind] = 1
a[-ind] = exp(-a_res$es^2 * (1 - 2 * a_res$pi) / 2 + a_res$es * U[-ind])
} else{
stop("OVtool currently only works under the ATE or ATT setting.")
}
return(a)
}
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