get.matrix.adjacency: Create any firm-firm (FF) matrix for common ownership or...

In FinNet: Quickly Build and Manipulate Financial Networks

Create any firm-firm (FF) matrix for common ownership or board interlocks

Description

Function to create a firm-firm (FF) matrix based on ownership or board interlocks:

Usage

get.matrix.adjacency(
  ...,
  who = c("managers", "owners"),
  ties = 3,
  id_as_firm_name = NULL,
  Matrix = NULL,
  self_ties = FALSE
)

Arguments

...	Either multiple objects of class firm or a list of such objects
who	Whether to extract the 'managers' or the 'owners' (minimum unambiguous string)
ties	Type of ties to create. Defaults to 2; for other possible values, see details.
id_as_firm_name	Whether to use the ticker as the firm's name. Defaults to TRUE if all firms' id is neither NULL nor NA.
Matrix	Whether to use the Matrix package. Defaults to TRUE when any matrix in the pipeline contains more than 10,000 cells and the package is installed.
self_ties	Whether to allow self-ties (a 'loop' in graph theory). Defaults to FALSE.

Details

The possible values of ties and their effect relative to the value of who are:

binary or 0 for binary ties. Namely:

• for owners: 1 if there is at least one common owner, 0 otherwise;

• for managers: 1 if there is at least one common manager, 0 otherwise.

naive, or 1 for 'naively' valued ties. Namely:

• for owners, the number of common owners;

• for managers, the number of common managers.

share or 2 (the default) for 'normalised' tie values. Namely:

• for owners, the share of i's owners who are also amongst j's owners;

• for managers, the share of i's managers who are also amongst j's managers.

Value

A matrix object of class financial_matrix(possibly using the Matrix package)

Author(s)

Telarico, Fabio Ashtar

See Also

FF

Other Internal matrix (de)constructrs: extract.matrix(), get.matrix.adjacency.both(), load.Matrix()

FinNet documentation built on Oct. 31, 2024, 5:07 p.m.