healthcare.antitrust (version 0.1.5)

div_calc: Diversion Ratio Calculator

Description

Calculates provider-level diversion ratios, once cells have been defined.

Usage

div_calc(
  data,
  cell = "cell",
  provider_id = "provider_id",
  provider = "provider",
  sys_id = "sys_id",
  focal_sys_id = NULL,
  party_ind = "party_ind",
  count = "count",
  dropDegenerateCell = TRUE,
  hosp_id = NA,
  hospital = NA
)

Value

A list with two components. The first component, provider_level, is a matrix giving provider-level diversions from party providers to all other providers The second object, sys_level, is a matrix that aggregates party providers to systems, thus giving diversions from party systems to all other providers

Arguments

data

Dataset of patient choices, with required variables: cell, provider_id, hospital, sys_id, party_ind, count. Use other function arguments to indicate alternative variable names to the default names.

cell

Name of variable specifying cell to which each observation has been allocated. Default variable name is cell. Can be created by cell_defn function.

provider_id

Name of variable specifying (numeric) provider identifier. Default variable name is provider_id.

provider

Name of variable specifying (string) provider name. Default variable name is provider.

sys_id

Name of variable specifying (numeric) system identifier. Default variable name is sys_id.

focal_sys_id

numeric; list of sys_id's specifying systems of interest for which diversions will be calculated from. For a merger, this will typically be the system identifies of the merging parties.

party_ind

deprecated; use focal_sys_id instead.

count

Name of variable indicating the number of admissions represented by the observation. Set = 1 for every row if each observation represents one admission.

dropDegenerateCell

logical; specifies how to treat cells with a 100 percent within-system share. If TRUE, observations in degenerate, 100 percent share cells will be ignored in the diversion ratio calculation. If FALSE, any such individuals will be assigned to the outside option, but still included in the denominator, so that the inside-option diversion will total less than 100 percent.

hosp_id

deprecated; use provider_id instead.

hospital

deprecated; use provider instead.

Details

For system-to-system diversions, set provider_id and provider equal to corresponding system-level identifiers. Diversions then reflect that patients are not allowed to divert to within-system alternative providers

For more details see the example vignette by typing: vignette("semipar_example", package = "healthcare.antitrust")

Examples

data(discharge_data, package = "healthcare.antitrust")

list1 <- c("drg","age","zip5")
layers <- list(list1)
th <- 15
discharge_data$count <- 1

outList <- cell_defn(discharge_data,th,layers)
D0 <- outList$assigned

out <- div_calc(D0, provider_id = "hosp_id", provider = "hospital",
          focal_sys_id = c(1,5))