discretise_border: Split the RD cut-off into borderpoints

In SpatialRDD: Conduct Multiple Types of Geographic Regression Discontinuity Designs

Split the RD cut-off into borderpoints

Description

Takes in a border in the form of a polyline (or borderpoints) and converts it into point data. These points are later used to run separate non-parametric RD estimations which eventually allows to visualise potential heterogeneous treatment effects alongside the cut-off.

Usage

discretise_border(
  cutoff,
  n = 10,
  random = FALSE,
  range = FALSE,
  ymax = NA,
  ymin = NA,
  xmax = NA,
  xmin = NA
)

Arguments

cutoff	sf object of the RD cut-off in the form of a line (not preferred, but also boundarypoints are possible)
n	the number of borderpoints to be created
random	whether they are randomly chosen (not desireable in most cases)
range	default = FALSE, if there is a specific range (N-S or E-W) for which the points are to be drawn (useful in order to exclude sparse borderpoints with little/no oberservations around because the non-parametric RD estimation will fail)
ymax	if range = TRUE: y coordinates
ymin	if range = TRUE: y coordinates
xmax	if range = TRUE: x coordinates
xmin	if range = TRUE: x coordinates

Value

an sf object with selected (and evenly spaced) borderpoints

Examples

borderpoints <- discretise_border(cutoff = cut_off, n = 10)

SpatialRDD documentation built on Aug. 8, 2023, 5:11 p.m.